| Abajo fleabane | 5 |
| Abert's buckwheat | 1 |
| Acacia | 1 |
| Acacia mistletoe | 2 |
| Acuminate onion | 19 |
| Acute cinquefoil | 2 |
| African mustard | 9 |
| Akali bulrush | 1 |
| Alaska bog orchid | 1 |
| Alaska bog-orchid | 1 |
| Alaska draba | 2 |
| Alaska willow | 1 |
| Alaska wormwood | 1 |
| Alberta draba | 1 |
| Alberta whitlowgrass | 1 |
| Alcove bog-orchid | 2 |
| Alcove columbine | 8 |
| Alcove goldenrod | 6 |
| Alcove solidago | 1 |
| alderleaf mountain mahogany | 5 |
| Alder-leaf mountain mahogany | 3 |
| Alder-leaf mountain-mahogany | 1 |
| Aleppo pine | 1 |
| Alfalfa | 1 |
| Alfalfa, lucern | 3 |
| Alka;I weed | 1 |
| Alkali Bulrush | 2 |
| alkali buttercup | 1 |
| Alkali cordgrass | 2 |
| Alkali mallow | 1 |
| Alkali sacaton | 3 |
| Alkali saccaton | 2 |
| Alkali weed | 1 |
| Aloysia | 2 |
| alpine arnica | 1 |
| Alpine avens | 1 |
| Alpine azalea | 1 |
| Alpine Bearberry | 1 |
| Alpine bentgrass | 3 |
| alpine biscuitroot | 4 |
| Alpine bistort | 5 |
| Alpine bladderpod | 2 |
| Alpine bladderwort | 1 |
| Alpine bluegrass | 3 |
| Alpine Buttercup | 9 |
| Alpine chickweed | 1 |
| Alpine clover | 1 |
| Alpine collomia | 4 |
| Alpine collomia, creeping collomia | 1 |
| alpine dustymaiden | 1 |
| Alpine fescue | 11 |
| Alpine feverfew | 1 |
| Alpine foxtail | 3 |
| Alpine golden buckwheat | 1 |
| Alpine groundsel | 1 |
| Alpine hyalineherb | 3 |
| Alpine milkvetch | 4 |
| Alpine mountainsorrel | 1 |
| alpine oreoxis | 3 |
| Alpine ovina | 1 |
| Alpine paintbrush | 1 |
| Alpine pepperplant | 1 |
| alpine pussytoes | 7 |
| alpine sagebrush | 4 |
| Alpine sandwort | 4 |
| Alpine saxifrage | 1 |
| Alpine shooting star | 1 |
| Alpine shootingstar | 4 |
| Alpine shooting-star | 1 |
| Alpine sweet-vetch | 1 |
| Alpine timothy | 10 |
| Alpine waterleaf | 1 |
| Alpine willowgrass | 1 |
| Alpine willowherb | 7 |
| Alpine wintergreen | 3 |
| Alpine yellowcress | 1 |
| Alsike clover | 1 |
| Althaea, Rose of Sharon | 1 |
| Althea, Rose-of-Sharon | 1 |
| Alyssum | 2 |
| American aborvitae | 1 |
| American beech | 1 |
| American bistort | 14 |
| American brooklime | 2 |
| American brookline | 6 |
| American bugseed, tickseed | 1 |
| American elm | 1 |
| American false candytuff | 1 |
| American hazelnut | 1 |
| American hop | 6 |
| American licorice | 2 |
| American Linden | 1 |
| American mannagrass | 5 |
| American pasqueflower | 1 |
| American plum | 2 |
| American pokeweed | 2 |
| American red currant | 1 |
| American redbud, Judas tree | 1 |
| American slough grass | 1 |
| American sloughgrass | 1 |
| American speedwell | 8 |
| American sycamore | 2 |
| American thorow wax | 1 |
| American vetch | 21 |
| Amur maple | 2 |
| Anderson's larkspur | 8 |
| Anderson's lycium | 3 |
| Annual bluegrass | 4 |
| Annual catchfly | 7 |
| Annual paintbrush | 6 |
| annual rabbitsfoot grass | 2 |
| Annual samphire | 2 |
| Annual townsendia | 14 |
| Annual wheatgrass | 4 |
| Annual wire lettuce | 1 |
| Annual wirelettuce | 8 |
| antelope goldenbush, deer goldenbush | 2 |
| Antelope Island skeletonplant | 1 |
| Apache plume | 10 |
| Apetalous catchfly | 1 |
| Apline bistort | 1 |
| Apricot | 1 |
| Aquarius paintbrush | 4 |
| Aquarius penstemon | 2 |
| Arabian grass | 5 |
| Arapaho sedge | 3 |
| Arboles milkvetch | 1 |
| arctic aster | 3 |
| Arctic bluegrass | 4 |
| Arctic chamomile | 1 |
| Arctic Dock | 1 |
| Arctic draba | 1 |
| Arctic groundsel | 2 |
| Arctic locoweed | 1 |
| Arctic meadowrue | 1 |
| Arctic poppy | 2 |
| Arctic sandwort, alpine sandwort | 1 |
| Arctic willow | 3 |
| Arctic willow or rock willow | 2 |
| Arctic willowherb | 1 |
| Argus gilia | 2 |
| Arid buckwheat | 4 |
| Arizona bladderpod | 1 |
| Arizona cypress | 5 |
| Arizona desert-thorn | 1 |
| Arizona four-nerve daisy | 3 |
| Arizona honeysweet, tidestromia | 10 |
| Arizona mountain dandelion | 4 |
| Arizona pincushion | 9 |
| Arizona rushpink | 4 |
| Arizona saltbush | 2 |
| Arizona skeletonplant | 1 |
| Arizona thistle | 1 |
| Arizona threeawn | 2 |
| Arizona three-awn | 1 |
| Arizona valerian | 1 |
| Arizona walnut | 1 |
| Arizona white oak | 1 |
| Arizona willow | 7 |
| Arizona wollybase | 1 |
| Arizona woollybase | 12 |
| Arizona wooly base | 1 |
| Arizona woolybase | 2 |
| Armed prickly poppy | 2 |
| Armed prickly-poppy | 11 |
| Arowleaf thelypody | 1 |
| Arroweed | 3 |
| arrowleaf balsamroot | 14 |
| Arrowleaf groundsel | 4 |
| Arrowleaf thelepody | 1 |
| Arrowleaf thelypody | 6 |
| Arrowleag thelypody | 1 |
| Arrowweed | 1 |
| Arroyo willow | 3 |
| Artic hairbell | 1 |
| Artic willow | 1 |
| arumleaf arrowhead | 1 |
| arumleaf arrowhead, arrowleaf | 5 |
| Arzona pine | 1 |
| Ashy cryptanth | 3 |
| Asian poppy | 1 |
| Asparagus | 3 |
| aspen fleabane | 15 |
| Asy cryptanth | 1 |
| Atkinson's golden tickseed | 1 |
| Autumn willowherb | 8 |
| Autumn willow-herb | 1 |
| Awapa fleabane | 3 |
| Awnless spikemoss | 5 |
| Aztec clover | 1 |
| bachelor buttons, garden cornflower | 1 |
| Back's sedge | 1 |
| Badlands phacelia | 1 |
| Bailey's ivesia | 1 |
| Bailey's rabbitbrush | 1 |
| Baird's camissonia | 1 |
| Bald cypress | 1 |
| Ballhead gilia | 9 |
| Balsam gorundsel | 2 |
| Balsam groundsel | 2 |
| Balsam poplar | 2 |
| Baltic rush | 1 |
| Bamboo orchid | 1 |
| banana yucca | 1 |
| Baneberry | 10 |
| Barbellate gentian | 2 |
| Barbey's larkspur | 6 |
| Barbey's willowherb | 1 |
| Barbwire Russian thistle | 3 |
| Barbwire Russian-thistle | 4 |
| Baren ground willow | 1 |
| Barneby's cryptanth | 3 |
| Barneby's paintbrush | 2 |
| Barnyard grass | 3 |
| Barren ground willow | 1 |
| Barrenground Willow | 4 |
| Basin aster | 1 |
| Basin fishook | 1 |
| Basin Jamesia | 2 |
| Basin pepperplant | 1 |
| Basin phlox | 2 |
| Basin Saltbush | 4 |
| Basin sandwort | 1 |
| basin-daisy | 1 |
| Bassia | 3 |
| Bastard toadflax | 22 |
| Beach dock | 1 |
| Beach knotweed | 1 |
| Beaded sedge | 10 |
| Beaked yellowcress | 2 |
| Bear River fleabane | 10 |
| Bearberry kinnikinnick | 1 |
| bearded cryptanth | 4 |
| Bearded flat sedge | 1 |
| Bearded sprangletop | 3 |
| beardless Mojave woodyaster | 2 |
| Beardless or creeping wildrye | 1 |
| Beardless rabbitsfoot grass | 1 |
| Beardlip penstemon | 1 |
| Beautiful blazing star | 1 |
| Beautiful blazingstar | 7 |
| Beautiful cinquefoil | 8 |
| beautiful fleabane | 3 |
| Beautiful or reddish sandwort | 1 |
| Beautiful sandwort | 1 |
| beautiful scorpionweed | 1 |
| Beautiful sedge | 3 |
| Beaver Dam milkvetch | 2 |
| Beaver Mountain groundsel | 1 |
| Beavertail cactus | 1 |
| Beaver-tip draba | 2 |
| Bebb willow | 2 |
| Bebb's willow | 6 |
| Bebb's Willow "Beaked Willow | 1 |
| Bebb's Willow, beaked willow | 1 |
| Beckwith's milkvetch | 9 |
| Beguiling cryptanth | 2 |
| Bent buckwheat | 5 |
| Bent milkvetch | 1 |
| Bentham's pincushion | 1 |
| Bent-nut cryptanth | 1 |
| Bergamont mint, lemmon mint | 1 |
| Bering chickweed | 7 |
| Bermuda grass | 2 |
| Berry picklypear | 1 |
| Berry pricklypear | 1 |
| betonyleaf brickellbush | 1 |
| bicknell milkvech | 1 |
| Bicknell milkvetch | 1 |
| Bicrenate cinquefoil | 7 |
| Bienneal evening primrose | 1 |
| biennial wormwood | 3 |
| Big galleta | 6 |
| Big Pine biscuitroot | 2 |
| Big saltbush | 2 |
| big sandreed | 3 |
| Big tree, Giant sequoia | 1 |
| Bigelow bluegrass | 1 |
| Bigelow ragged rock flower | 1 |
| Bigelow's bluegrass | 5 |
| Bigelow's false willow | 1 |
| Bigelow's four-o'clock | 2 |
| Bigelow's four-o-clock | 2 |
| Bigelow's linanthus | 5 |
| Bigelow's monkeyflower | 2 |
| Bigelow's sagebrush | 5 |
| bighead dustymaiden | 5 |
| Big-headed clover | 1 |
| bigleaf periwinkle | 4 |
| bigseed biscuitroot | 1 |
| bigtooth maple | 9 |
| Bilobed speedwell | 4 |
| Bindweed | 1 |
| Bipartite sedge | 1 |
| birchleaf buckthorn | 5 |
| Birdnest buckwheat | 1 |
| Bird's foot trefoil | 1 |
| Birds-foot trefoil | 1 |
| Bishop's milkvetch | 11 |
| Bitter dock | 2 |
| bitter fleabane | 6 |
| Bitterbrush | 5 |
| Bitteroot | 2 |
| Black alpine sedge | 2 |
| Black bindweed | 4 |
| Black crowberry | 1 |
| Black grama | 2 |
| Black gum, black tupelo | 1 |
| black hawthorn | 1 |
| black locust | 2 |
| Black locust, false acacia | 4 |
| Black medic | 2 |
| Black mustard | 4 |
| Black nightshade | 1 |
| Black raspberry | 1 |
| black sagebrush | 7 |
| Black twinberry | 11 |
| Black twin-berry | 1 |
| Black Willow | 1 |
| Blackbrush | 7 |
| Blackbrush lupine | 1 |
| Blackcreeper sedge | 6 |
| Blackened sedge | 3 |
| Blackfoot daisy | 2 |
| blackhead fleabane | 1 |
| Bladder sage | 2 |
| Bladder-pod | 1 |
| Bladder-sage | 5 |
| Bladder-sage, paperbag bush | 1 |
| Bladder-senna | 2 |
| Bleeding heart | 1 |
| Blister buttercup | 3 |
| Blister sedge | 2 |
| Blowout grass | 2 |
| Blue clematis | 4 |
| Blue elderberry | 12 |
| Blue flax | 11 |
| Blue grama | 6 |
| Blue gramma | 2 |
| Blue jacobsladder | 3 |
| Blue jacobs-ladder | 1 |
| Blue Jacobsladder, Western Jacobsladder | 1 |
| Blue lettuce | 2 |
| Blue lyme grass | 1 |
| Blue nodding locoweed | 1 |
| Blue phacelia | 2 |
| Blue spruce | 3 |
| Blue spurge | 2 |
| Blue vervain | 3 |
| Blue violet | 12 |
| Blue wildrye | 5 |
| Blue windflower | 1 |
| Blue wirelettuce | 1 |
| Bluebell | 1 |
| Bluebell bellflower | 1 |
| Bluebells of Scotland | 6 |
| Bluebell's of Scotland | 2 |
| Blueberry | 1 |
| Bluebunch wheatgrass | 9 |
| Bluedicks | 10 |
| Blue-eyed grass | 4 |
| Blue-eyed Mary | 17 |
| Bluejoint | 1 |
| Bluejoint reedgrass | 3 |
| Bluestem penstemon | 1 |
| Bluets | 1 |
| Blunt sedge | 2 |
| Blunt starwort | 2 |
| Bluntleaf sandwort | 1 |
| bluntseed sweetroot | 10 |
| Blur-eyed Mary | 1 |
| Blushing scale | 5 |
| Boarder lobelia | 1 |
| Bog Aster | 1 |
| Bog blueberry | 1 |
| Bog laurel | 3 |
| Bog violet | 11 |
| Bog yellowcress | 1 |
| Bolander's reedgrass | 1 |
| Bonneville saltbush | 1 |
| Booth's camissonia | 4 |
| Booth's evening-primrose | 1 |
| Booth's willow | 15 |
| Boreal locoweed | 2 |
| Boreal Sedge | 2 |
| Bottlebrush | 1 |
| Bottle-brush grass | 1 |
| Bottlebush | 1 |
| Bottlebush, desert trumpet | 2 |
| Bottlestopper, desert trumpet | 2 |
| Boublecomb draba | 1 |
| Bouncing-bet | 2 |
| Bouncing-bet, soapwort | 2 |
| boxelder | 9 |
| Bracken fern | 5 |
| Bracteate lousewort | 6 |
| Branch pepperplant | 3 |
| Branched birdsbeak | 1 |
| Branching groundsmoke | 5 |
| Brandegee's desert twinbugs | 3 |
| Brandegee's desertparsley | 3 |
| Brandegee's onion | 4 |
| Brandgee's onion | 1 |
| Breaks bladderpod | 1 |
| Breaks draba | 3 |
| Brewer's bittercress | 4 |
| brewer's cliffbrake | 3 |
| Brewer's cliff-brake | 1 |
| Brewer's monkeyflower | 1 |
| Brick scale | 3 |
| Bride's bonnet | 2 |
| Bridges evening-primrose | 2 |
| Bridges' penstemon | 1 |
| Brief penstemon | 8 |
| Brightwhite | 5 |
| Bristly Black Currant, prickly currant | 1 |
| bristly cryptantha | 1 |
| Brittle fern | 11 |
| Brittle or short spineflower | 1 |
| Brittle phacelia | 5 |
| Brittle pricklypear | 4 |
| Brittle-fern | 12 |
| Brnadegee's onion | 1 |
| Broad leafed gilia | 1 |
| broadleaf arnica | 7 |
| Broadleaf knotweed | 1 |
| broadleaf milkweed | 1 |
| Broadleaf penstemon | 1 |
| Broadleaf pepper plant | 1 |
| Broadleaf pepperplant | 2 |
| Broadleaf plantain | 1 |
| Broadleaf plantain, common plantain | 1 |
| Broadleaf rush | 1 |
| Broadleaf willowherb, dwarf fireweed | 1 |
| Broad-leaved cattail | 2 |
| Broadleaved clarkia | 1 |
| Broadlobe gilia | 3 |
| broadsheath desertparsley | 1 |
| Broad-winged pectocarya | 1 |
| Bronze evening primrose | 3 |
| Brook grass | 1 |
| Brook saxifrage | 14 |
| Brookgrass | 6 |
| Broom flax | 2 |
| Broom goroundsel | 1 |
| Broom groundsel | 6 |
| Broom seepweed | 3 |
| broom snakeweed, matchweed | 13 |
| Broomcorn panic | 1 |
| Broomcorn panic, hog millet | 2 |
| Broom-flax | 7 |
| Broomlike ragwort | 1 |
| Brown stipplescale | 1 |
| Brown-eyed primrose | 1 |
| Brown-eyed scale | 1 |
| Brownish sedge | 2 |
| Browse milkvetch | 7 |
| Bruneau mariposa | 1 |
| Bryony | 2 |
| Buckbean | 3 |
| Buckhorn cholla | 2 |
| Buckley's centaury | 2 |
| Buckthorn cholla | 2 |
| Bud sage | 4 |
| Budsage | 4 |
| Buffalo burr | 1 |
| Buffalo grass | 1 |
| Buffalobur | 3 |
| Bugloss | 1 |
| Bugseed, tickseed | 2 |
| Bulbous Bluegrass | 6 |
| bull thistle | 4 |
| Bunchberry | 2 |
| Bur bristlegrass | 2 |
| Bur buttercup | 4 |
| Burkwood's viburnum | 1 |
| Burnet | 5 |
| Burr bristlegrass | 1 |
| Burr buttercup | 4 |
| burrobush, winged ragweed | 8 |
| Bush arrowleaf | 2 |
| Bush muly | 1 |
| Bush penstemon | 2 |
| Bush penstemon, Gila penstemon | 1 |
| Bush trefoil | 2 |
| Bushy cord lichen | 2 |
| Bushy knotweed | 3 |
| Butter & eggs | 2 |
| Butterfly bush | 3 |
| butterfly milkweed | 3 |
| Butterfly wild buckwheat | 1 |
| Caespitose four-nerve daisy | 3 |
| Cainville thistle | 3 |
| Calder's bladderpod | 1 |
| California angelica | 1 |
| California bear-claw-poppy | 2 |
| California brickellbush | 6 |
| California brome, mountain brome | 1 |
| California buckwheat | 2 |
| California chicory | 2 |
| California cottonrose | 1 |
| California dalea | 1 |
| California gourd | 1 |
| California pinyon pine | 3 |
| California poppy | 2 |
| California tansy mustard | 1 |
| California tansymustard | 1 |
| California tansy-mustard | 12 |
| Calyx starwort | 2 |
| Camas | 1 |
| camphorweed | 1 |
| Canada bluegrass | 6 |
| Canada goldenrod | 1 |
| Canada rockcress | 1 |
| Canada thistle | 5 |
| Canada violat | 1 |
| Canada violet | 6 |
| Canada wildrye | 2 |
| Canadian burnet | 1 |
| Canadian horseweed | 5 |
| Canaigre | 1 |
| Canaigre dock, desert rhubarb | 4 |
| Canary grass | 2 |
| Canby's aster | 2 |
| Candelabra thelypody | 3 |
| Canoe milkvetch | 4 |
| Canyon grape | 2 |
| Canyon kentrophyta | 1 |
| Canyonlands biscuitroot | 1 |
| Canyonland's or Ive's woollybase | 1 |
| Canyonlands or Ives' woolybase | 1 |
| Canyonlands woollybase | 1 |
| Caone milkvetch | 1 |
| Capitate lousewort | 2 |
| Capitate sedge | 2 |
| Capitate waterleaf | 13 |
| Carbon cryptanth | 2 |
| Carbon cryptantha | 1 |
| Carmine gilia | 5 |
| Carpet bentgrass | 2 |
| Carpet bugle | 1 |
| Carpet phlox | 7 |
| carrot | 3 |
| Carruth's sagewort, Carruth's wormwood | 2 |
| Carson's Phacelia | 6 |
| Casey's corydalis | 3 |
| Cassia | 2 |
| Castle valley saltbrush | 2 |
| Castle Valley saltbush | 4 |
| Catchweed | 3 |
| catchweed bedstraw | 1 |
| Catclaw acacia | 2 |
| Catnip | 1 |
| Cattail | 1 |
| Cave primrose | 1 |
| Cave primrose, Easter flower | 1 |
| cave-dwelling primrose | 1 |
| Cedar Breaks fleabane | 2 |
| Cedar Breaks springparsley | 1 |
| Cedar canyon phlox | 1 |
| Cedar of Lebanon | 2 |
| Central pricklypear | 8 |
| Centranthus, red valerian | 1 |
| Cervice Penstemon | 1 |
| Chamber's twinpod | 14 |
| Chambers' twinpod | 5 |
| Chamisso's arnica | 1 |
| Chamomile | 1 |
| Charlock | 1 |
| charming woodyaster, Cisco woodyaster | 4 |
| chatterley's onion | 1 |
| Cheat grass | 1 |
| Cheatgrass | 5 |
| Cheatgrass, downy chess | 1 |
| Cheeses | 1 |
| Cheeses, common mallow | 2 |
| Cheeses, mallow | 2 |
| Cherry-laurel | 1 |
| Chia | 9 |
| Chickpea milkvetch | 1 |
| chicory | 4 |
| Chinaberry | 2 |
| Chinle phacelia | 3 |
| Chives | 3 |
| Chlorocrambe | 2 |
| chokecherry | 20 |
| Chufa flat-sedge | 2 |
| cicada milkvetch | 2 |
| Ciliate aster | 1 |
| Cinnamon fern | 1 |
| Circle-pod pea | 1 |
| Cisco aster | 1 |
| Claretcup | 9 |
| Claron pepperplant | 1 |
| Clavate willow | 1 |
| Clavate willowherb | 3 |
| Clay milkvetch | 2 |
| Clay verbena | 1 |
| Clear Creek fleabane | 1 |
| Cleavers common bedstraw | 2 |
| Cleavers, common bedstraw | 4 |
| cleftleaf scorpionweed | 1 |
| Cleft-leaved groundsel | 1 |
| Clement's goldenweed | 6 |
| Cliff needlegrass | 1 |
| Cliff rose | 3 |
| cliffdweller's cryptantha | 1 |
| Cliff-rose | 20 |
| Cloud sedge | 1 |
| Cloudberry | 1 |
| Clubpod camissonia | 3 |
| Cluster canceroot | 1 |
| Cluster cancerroot | 11 |
| clustered goldenweed | 1 |
| Coast goldenrod | 6 |
| Coast goldenweed | 1 |
| Cobweb milkvetch | 6 |
| cobweb-pod freckled milkvetch | 5 |
| Cocklebur | 3 |
| Coclebur | 1 |
| Coclkebur | 1 |
| Coin buckwheat | 1 |
| Colchita | 1 |
| Coliche milkvetch | 9 |
| Colonial bentgrass | 1 |
| Colorado bedstraw | 1 |
| Colorado bladderpod | 9 |
| Colorado cloumbine | 1 |
| Colorado columbine | 42 |
| Colorado Plateau bladderpod | 2 |
| Colorado Plateau blanketflower | 12 |
| Colorado Plateau cushion-daisy | 4 |
| Colorado rock-shield lichen | 1 |
| Colorado rubberweed | 12 |
| Colorado spiny milkvetch | 1 |
| Colorado xanthoparmelia lichen | 1 |
| Colton's milkvetch | 2 |
| Columbia groundsel | 1 |
| Columbia ragwort | 3 |
| Comfrey | 3 |
| Common alum-root | 2 |
| Common apple | 3 |
| common barlely | 1 |
| Common barley | 1 |
| Common bladderwort | 1 |
| common blanketflower | 4 |
| Common bleeding heart | 1 |
| Common borage | 1 |
| Common box | 1 |
| common burdock | 2 |
| common bur-sage, burrobush | 6 |
| Common cattail | 2 |
| common chickweed | 3 |
| common cowparsnip | 2 |
| Common dandelion | 5 |
| Common fig | 1 |
| Common fumatory | 1 |
| Common fumitory | 2 |
| Common gilia | 2 |
| Common gilia, lobeleaf gilia | 1 |
| Common globemallow | 34 |
| Common globmallow | 1 |
| Common ground cherry | 1 |
| Common groundcherry | 1 |
| Common ground-cherry | 1 |
| Common groundsel | 2 |
| Common haylineherb | 13 |
| Common horehound | 4 |
| Common horsechestnut | 1 |
| Common hyacinth | 1 |
| Common hyalineherb | 6 |
| Common juniper | 13 |
| Common lilac | 2 |
| Common mallow | 1 |
| Common marestail | 3 |
| Common monkey flower | 6 |
| Common monkeyflower | 2 |
| Common monkey-flower | 11 |
| Common oats | 1 |
| Common or western hoptree | 1 |
| common paintbrush | 36 |
| Common persimmon | 1 |
| Common plantain | 2 |
| Common powderhorn | 2 |
| Common pricklegrass | 3 |
| Common prickly pear | 1 |
| Common pricklypear | 2 |
| common ragweed | 2 |
| Common Reed | 3 |
| common rock goldenrod | 11 |
| Common rockcress | 6 |
| Common rush | 1 |
| Common sassafras | 2 |
| common scouringrush | 4 |
| Common silverweed | 5 |
| Common sliverweed | 1 |
| Common snapdragon | 1 |
| Common soil ruby | 2 |
| Common sowthistle | 2 |
| Common sow-thistle | 1 |
| Common spike rush | 1 |
| Common spikerush | 9 |
| Common stonecrop | 17 |
| Common sulfer flower | 1 |
| common sunflower | 5 |
| Common threadplant | 1 |
| Common threesquare | 10 |
| Common tulip | 4 |
| Common velvetgrass | 1 |
| Common western wildrye | 2 |
| common woolly sunflower | 6 |
| common yampah | 2 |
| common yarrow | 1 |
| Common yellowcress | 4 |
| Common yellowgrass | 1 |
| Common, alpine or Siberian smelowskia | 1 |
| Commonn paintbrush | 1 |
| Compact Camissonia | 4 |
| Compact nama | 1 |
| Conelike milkvetch | 1 |
| Constance's phacelia | 3 |
| Contra stoneseed | 10 |
| Cooper's dogweed | 1 |
| Cooper's hymenoxys | 2 |
| Cooper's lycium | 1 |
| Cooper's rubberweed | 2 |
| Copperweed | 3 |
| Cordroot beardtongue | 1 |
| Cordroot penstemon | 1 |
| Corn poppy | 3 |
| Corn speedwell | 2 |
| Corrugate phacelia | 15 |
| Corymbose canceroot | 1 |
| Corymbose cancerroot | 1 |
| Cottam's cinquefoil | 1 |
| Cottam's cinquifoil | 1 |
| cottonbatting plant | 1 |
| Cow clover, Wormskiold's clover | 1 |
| Cows tongue | 1 |
| coyote gilia | 7 |
| Coyote tobacco | 4 |
| Coyote willow | 3 |
| Coyote Willow, sandbar willow | 8 |
| Coyote, narrowleaf willow | 1 |
| crack willow | 3 |
| Cranesbill geranium | 1 |
| Cream buckwheat | 14 |
| cream narcissus | 2 |
| Creeping buttercup | 9 |
| Creeping jenny | 1 |
| Creeping lovegrass | 1 |
| Creeping Oregon grape | 1 |
| Creeping rushpea | 1 |
| Creeping rush-pea | 5 |
| Creeping spearwort | 4 |
| Creeping spikerush | 1 |
| Creeping woodsorrel | 1 |
| Crenulate phacelia | 7 |
| Creosote bush | 8 |
| crescent milkvetch | 15 |
| Cresent milkvetch | 2 |
| Cresoste bush | 1 |
| Crestrib morning glory | 2 |
| Crevice phacelia | 2 |
| Crisped pondweed | 1 |
| Cronquist's buckwheat | 1 |
| Cronquist's pale agoseris | 6 |
| Cronquist's stickleaf | 2 |
| Crowberry | 1 |
| Crown mockorange | 2 |
| Crownbeard | 1 |
| Crownvetch axseed | 1 |
| Cryptanth phacelia | 3 |
| Cuckoo flower | 2 |
| Cucumber root | 1 |
| Cucumber magnolia | 1 |
| Cucumber-root | 3 |
| Cultivated rye | 2 |
| Curled dock | 2 |
| Curled snow lichen | 1 |
| Curl-leaf mountain mahogany | 4 |
| Curl-leaf mountain-mahogany | 4 |
| Curl-leaf Mountain-mohogany | 1 |
| Curly dock | 1 |
| Curly grass | 1 |
| Curly sedge | 1 |
| curlycup gumweed | 7 |
| Curlygrass | 1 |
| Curve phacelia | 1 |
| Cushion buckwheat | 25 |
| Cushion cryptanth | 1 |
| Cushion draba | 1 |
| Cushion milkwort | 6 |
| Cushion milkwort, showy milkwort | 2 |
| Cushion paronychia | 1 |
| Cushion phlox | 13 |
| Cusick whitlowgrass | 2 |
| Cutleaf anemone | 3 |
| Cut-leaf anemone | 2 |
| Cutleaf anemone, Globe flower | 1 |
| Cutleaf anemone, globeflower | 3 |
| cutleaf balsamroot | 4 |
| Cutleaf coneflower | 2 |
| cutleaf fleabane, fernleaf fleabane | 20 |
| cutleaf gumweed | 1 |
| Cut-leaf mountain-mahogany | 1 |
| Cutleaf nightshade | 1 |
| Cut-leaf nightshade | 1 |
| Cutleaf synthris | 4 |
| Cutleaf synthyris | 1 |
| cutleaf waterparsinp | 5 |
| Cutleaf wildheliotrope | 1 |
| Cut-leaved anemone | 1 |
| Cut-leaved nightshade | 1 |
| Cutler's ephedra | 1 |
| Cutters ephedra | 1 |
| Cyote or narrowleaf willow | 1 |
| daffodil | 2 |
| Daggett penstemon | 4 |
| Dainty moonwort | 1 |
| Dakota verbena | 1 |
| Dalmatian toadflax | 1 |
| Dalmation toadflax | 7 |
| Dame's violat | 1 |
| Dame's violet, Sweet rocket | 1 |
| Dandelion camissonia | 3 |
| Dandelion cammisonia | 1 |
| Dandilion | 1 |
| Davidson's buckwheat | 1 |
| Davidson's buckwheat | 3 |
| Dawn redwood | 1 |
| Daylily | 1 |
| Day-lily | 1 |
| Dead nettle | 1 |
| Dead-nettle | 1 |
| Dear-brush | 1 |
| Death Valley phacelia | 2 |
| Deceptive groundsmoke | 7 |
| Decurved camissonia | 1 |
| Deep Creek cinquefoil | 2 |
| Deep Creek stickseed | 1 |
| Deep-Creek cinquefoil | 2 |
| Deep-Creek stickseed | 2 |
| deerbrush | 1 |
| deer-brush | 6 |
| Defective milkvetch | 3 |
| Deflexed rockcress | 1 |
| Delicate gilia | 1 |
| Dense lace-fern | 1 |
| Densecress | 6 |
| Dense-leaf whitlograss | 1 |
| Deseret milkvetch | 2 |
| Desert almond | 2 |
| Desert alyssum | 8 |
| Desert anemone | 5 |
| Desert bahia | 6 |
| Desert basindaisy | 1 |
| Desert beardtongue | 1 |
| Desert buckwheat | 1 |
| Desert chicory | 7 |
| Desert crater lichen | 1 |
| Desert dandelion, filiform malacothrix | 1 |
| Desert eucrypta | 2 |
| Desert firedot lichen | 1 |
| Desert groundsel | 9 |
| Desert holly | 4 |
| Desert lavender | 1 |
| Desert madwort | 1 |
| Desert mistletoe | 1 |
| Desert needlegrass | 6 |
| Desert nest-straw | 2 |
| desert olive | 3 |
| Desert olive, coyote bush | 1 |
| Desert peach | 4 |
| Desert peach, desert almond | 1 |
| Desert phlox | 15 |
| desert pincushion | 18 |
| Desert plume | 2 |
| Desert prince's plume | 1 |
| desert princes-plume | 1 |
| Desert rock pea | 1 |
| Desert rockcress | 1 |
| Desert salt grass | 1 |
| Desert saltgrass | 4 |
| desert seep-willow | 3 |
| Desert stickleaf | 6 |
| Desert sulphur lichen | 2 |
| Desert tobacco | 6 |
| Desert trumpet | 2 |
| Desert trumpet, bottlebrush | 2 |
| Desert violet | 1 |
| Desert wheatgrass | 3 |
| Desert willow | 6 |
| Desert wirelettuce | 2 |
| desert woollystar | 2 |
| desert yellow fleabane | 1 |
| desert-marigold | 8 |
| Desert-rue, turpentine bush | 3 |
| Despain's footcactus | 1 |
| Devil’s-claw cactus | 1 |
| devil's beggarticks | 1 |
| Devil's matchstick | 1 |
| devilsclub | 1 |
| Dewey's sedge | 1 |
| Diamond willow, glaucus willow | 1 |
| Diamond willow, Missouri willow | 2 |
| Diamondleaf saxifrag | 1 |
| Diamondleaf saxifrage | 7 |
| Different leaf sphaeromeria | 1 |
| Differentleaf sphaeromeria | 4 |
| Diffuse groundsmoke | 3 |
| Difuse groundsmoke | 1 |
| Diplotaxis | 3 |
| Distant phacelia | 1 |
| Ditch polypogon | 1 |
| Dog lichen | 1 |
| Dog rose | 5 |
| Dog tooth violet, glacier lily | 1 |
| Dogtooth violet | 3 |
| Dogtooth Voilet | 1 |
| Dogtooth-violet | 7 |
| Dorr's sage | 9 |
| Doublecomb draba | 10 |
| Double-comb draba | 2 |
| Doubtful knight's spur | 1 |
| Douglas campion | 1 |
| Douglas' campion | 7 |
| Douglas' catchfly | 1 |
| Douglas' champion | 1 |
| Douglas' dustymaiden | 29 |
| Douglas fir | 8 |
| Douglas fir dwarf misletoe | 1 |
| Dougla's knotweed | 1 |
| Douglas' knotweed | 8 |
| Douglas' sedge | 3 |
| Doveweed | 3 |
| Downy paintbrush | 1 |
| Drab buttercup | 13 |
| Draba milkvetch | 6 |
| Drooping woodreed | 2 |
| Drummond willow | 1 |
| Drummonds catchfly | 1 |
| Drummond's catchfly | 7 |
| Drummond's milkvetch | 4 |
| Drummonds rockcress | 1 |
| Drummond's rockcress | 11 |
| Drummond's rockcress, Canadian rockcress | 1 |
| Drummond's rush | 4 |
| Drummond's sedge | 1 |
| Drummond's willow | 5 |
| Drunnond's rockcress | 1 |
| Duchesne buckwheat | 1 |
| Duchesne milkvetch | 3 |
| Dugway cactus | 1 |
| dumbcane | 1 |
| dune rubber rabbitbrush | 2 |
| Dune scurfpea | 4 |
| Dunhead sedge | 3 |
| Dunhead sedge, hare sedge | 1 |
| Dunnhead sedge | 1 |
| Dusty penstemon | 6 |
| Dutch elm | 1 |
| Dwarf ninebark | 1 |
| dwarf alpine hawksbeard | 1 |
| Dwarf bilberry | 1 |
| Dwarf buckwheat | 3 |
| Dwarf castilleja | 1 |
| Dwarf clover | 1 |
| dwarf cottonrose | 1 |
| Dwarf cryptanth | 20 |
| Dwarf cryptantha | 1 |
| Dwarf draba | 2 |
| Dwarf draba, Carolina whitlow-grass | 1 |
| Dwarf fireweed | 1 |
| dwarf fleabane | 4 |
| Dwarf gilia | 9 |
| Dwarf gilia, eriastrum gilia | 2 |
| Dwarf goldenrod | 3 |
| Dwarf huckelberry | 2 |
| Dwarf huckleberry | 2 |
| Dwarf lewisia | 9 |
| Dwarf lupine | 12 |
| Dwarf lupine, rusty lupine | 3 |
| Dwarf lweisia | 1 |
| Dwarf mountain mahogany | 3 |
| Dwarf mountain ragwort | 1 |
| Dwarf Mountain-mahogany | 4 |
| Dwarf ninebark | 3 |
| Dwarf paintbrush | 7 |
| Dwarf panitbrush | 1 |
| Dwarf penstemon | 2 |
| Dwarf pondweed | 1 |
| Dwarf pygmaea | 1 |
| dwarf skyrocket | 1 |
| Dwarf spikerush | 1 |
| Dye cryptanth | 14 |
| Dyers Woad | 1 |
| Dyer's woad | 4 |
| Early coralroot | 1 |
| Early evening primrose | 4 |
| Early evening-primrose | 1 |
| Eastwood paintbrush | 2 |
| Eastwood's buckwheat | 1 |
| Eastwood's camisonia | 1 |
| Eastwood's camissonia | 5 |
| Eastwood's oak | 1 |
| Eastwood's paintbrush | 5 |
| Eastwood's sandwort | 12 |
| Eastwood's small fescue | 1 |
| Eaton's aster | 2 |
| Eaton's beardtongue | 10 |
| Eaton's fleabane | 34 |
| Eaton's penstemon | 15 |
| Eaton's penstemon, scarlet bugler | 1 |
| Eaton's thistle | 3 |
| Ebony sedge | 1 |
| Ebony spleenwort | 1 |
| Edible valerain | 4 |
| Edible valerian | 3 |
| Egg milkvetch | 1 |
| Egglestons Sedge | 1 |
| Eggleston's sedge | 3 |
| Eight-petal mountain avens | 1 |
| Ekman's pussytoes | 1 |
| Elegant columbine | 1 |
| elegant aster | 2 |
| Elegant cats ears | 1 |
| elegant cinquefoil | 1 |
| Elegant columbine | 1 |
| Elegant death camas | 14 |
| Elegant disc lichen | 1 |
| elegant hawksbeard | 1 |
| Elegant lupine | 7 |
| Elegant thelypody | 7 |
| Elephant head | 1 |
| Elephant-head | 12 |
| Elk sedge | 2 |
| Elk weed | 1 |
| Elko whitlograss | 1 |
| Elkweed | 8 |
| Ellen's buckwheat | 1 |
| Ellis' milkvetch | 5 |
| Ellis' stinking milkvetch | 1 |
| Elmer's cinquefoil | 2 |
| Elsinore buckwheat | 1 |
| Emory's rockdaisy | 1 |
| Emory's rock-daisy | 1 |
| Enchanters nightshade | 1 |
| Enchanter's nightshade | 1 |
| Engelmann hedgehog cactus | 1 |
| Engelmann hedgehog-cactus | 1 |
| Engelmann spruce | 1 |
| Engelmann's aster | 9 |
| Engelmann's fleabane | 9 |
| Engelmann's gentian | 5 |
| Engelmann's hedgehog-cactus | 1 |
| Engelmann's spruce | 3 |
| Engelman's gentian | 1 |
| Englemann's aster | 1 |
| English elm | 1 |
| English hawthorn | 1 |
| English plantain | 3 |
| English walnut | 2 |
| Entire mentzelia | 4 |
| Entireleaf mountain-avens | 2 |
| Erect avens | 1 |
| Escarpment milkvetch | 1 |
| Eschscholtz' buttercup | 4 |
| Eureka milkvetch | 6 |
| European bittersweet | 8 |
| European bur-reed | 1 |
| European mountain ash | 1 |
| European skullcap | 1 |
| European stickseed | 5 |
| European wintercress | 1 |
| Evening primrose | 1 |
| Evening snow | 1 |
| Explorer gentian | 5 |
| eyed gilia | 1 |
| Eyed spurge | 1 |
| Eyelash grass | 1 |
| Fairway or crested wheat grass | 1 |
| Fairy bells | 1 |
| Fairybells | 5 |
| Fairyduster | 1 |
| Fall buttercup | 2 |
| Fall squash | 1 |
| false agoseris, cutleaf agoseris | 14 |
| False buffalograss | 2 |
| False bugbane | 1 |
| False bug-bane | 2 |
| False flax | 2 |
| False flax, little pod false flax | 1 |
| False gilyflower | 1 |
| False hellebore, Skunk-cabbage | 3 |
| False nightshade | 1 |
| False nutsedge | 1 |
| False Solomon-seal | 7 |
| false willow | 3 |
| Falseflax | 3 |
| Fan ramalina, burning bush | 2 |
| Fathen saltplant | 2 |
| Father's penstemon | 6 |
| Feather finger grass | 1 |
| Feather fingergrass | 2 |
| Feather gilia | 3 |
| featherleaf springparsley | 1 |
| Fee's lipfern | 3 |
| Felwort | 3 |
| Fendler meadowrue | 2 |
| Fendlerbush | 2 |
| Fendler's bladderpod | 1 |
| Fendler's cryptanth | 4 |
| Fendler's euphorb | 18 |
| Fendler's lip fern | 1 |
| Fendler's meadowrue | 10 |
| Fendler's Mountain-lilac | 3 |
| Fendler's pennycress | 1 |
| Fendler's Sandwort | 6 |
| Fendler's springparsley | 4 |
| Fennel-leaf pondweed | 3 |
| Fern bush | 4 |
| Fern bush, Desert sweet | 3 |
| Fernald's northern rockcress | 3 |
| Fernbush | 3 |
| fernleaf licorice-root | 2 |
| Ferron milkvetch | 5 |
| Ferron milkvetch, Musinea milkvetch | 1 |
| Feverfew | 1 |
| Fewflower bog-orchid | 2 |
| Fewflower eriastrum | 2 |
| Fewflower wirelettuce | 4 |
| few-flowered pea | 8 |
| Few-seeded draba | 1 |
| Few-seeded whitlograss | 1 |
| fiddleneck | 1 |
| Field bindweed | 2 |
| Field brome | 3 |
| Field chickweed | 2 |
| Field dog-lichen | 2 |
| Field locoweed | 1 |
| Field milkvetch | 6 |
| field milkvetch, purple locoweed | 1 |
| Field mint | 9 |
| Field oxytrope | 1 |
| Field pennycress | 2 |
| Field pumpkin | 1 |
| field sagewort, boreal sagewort | 1 |
| field sagewort, field wormwood | 13 |
| Field sandbur | 1 |
| Field sowthistle | 2 |
| Field sow-thistle | 1 |
| fieldcress | 1 |
| Fieldmint | 1 |
| Figwort | 2 |
| Filiform malacothrix | 11 |
| Filiform pondweed | 1 |
| Fineleaf hymenopappus | 9 |
| Firecrackerbush | 1 |
| Firethorn | 1 |
| Fire-thorn | 1 |
| Fireweed | 13 |
| Fire-weed | 1 |
| firewheel | 2 |
| Firleaf penstemon | 3 |
| fivenerve little sunflower | 1 |
| Five-point bishop's cap | 2 |
| Fivestar miterwort | 2 |
| Fivetooth spineflower | 2 |
| flatspine bur ragweed | 7 |
| Flattened combseed | 2 |
| Flat-top draba | 2 |
| flat-top pussytoes | 6 |
| flat-topped buckwheat | 6 |
| Flax flower | 1 |
| Flaxflower | 4 |
| flaxleaf plains mustard | 1 |
| fleshy beardtongue | 1 |
| Fleshy penstemon | 6 |
| Fleur-de-lis | 2 |
| Flixweed | 4 |
| Flixweed, bed groundweed | 1 |
| Flixweed, bedground-weed | 1 |
| Flixweed, tansy-mustard | 1 |
| Floccose gilia | 2 |
| Flodman's thistle | 1 |
| Flood ladies tresses | 1 |
| Flooded adies tresses | 1 |
| Flower of an hour | 2 |
| Flowering cherry | 1 |
| flowering quince | 2 |
| Flower-of-an-hour | 2 |
| Fluff grass | 1 |
| Fluffgrass | 3 |
| Fluff-grass | 1 |
| Foetid sedge | 1 |
| foothill deathcamas | 1 |
| Foothills death camas | 8 |
| Four-angle mountain heather | 1 |
| Four-part dwarf gentian | 1 |
| fourwing saltbush | 2 |
| Four-wing Saltbush | 7 |
| Fowl bluegrass | 10 |
| Fowl mannagrass | 7 |
| Foxtail barley | 4 |
| Foxtail chess | 1 |
| Fragile fern | 1 |
| Fragrant honeysuckle | 1 |
| Fragrant sand verbena | 1 |
| Fragrant sand verbina | 1 |
| Fragrant sand-verbena | 22 |
| Fragrant shield-fern | 1 |
| Freckled milkvetch | 1 |
| Freemonts buckwheat | 1 |
| Freemont's buckwheat | 1 |
| Freemont's indigo bush | 1 |
| Freemont's phacelia | 1 |
| Fremont goosefoot | 1 |
| Fremont's buchwheat | 1 |
| Fremont's buckwheat | 11 |
| Fremont's chaffbush | 2 |
| Fremont's cottonwood | 6 |
| Fremont's goosefoot | 2 |
| Fremont's groundsel | 2 |
| Fremont's indigo bush | 2 |
| Fremont's indigo-bush | 4 |
| Fremont's indigo-bush or dalea | 1 |
| Fremont's indigo-bush, dotted dalea | 1 |
| Fremont's mahonia | 9 |
| Fremont's penstemon | 2 |
| Fremont's pepperplant | 4 |
| Fremonts phacelia | 1 |
| Fremont's phacelia | 12 |
| Fremont's pincushion | 4 |
| Fremont's syntrichopappus | 1 |
| fringe pod | 1 |
| Fringecup | 10 |
| Fringed brome | 5 |
| Fringed grass-of-parnassus | 4 |
| fringed thistle | 1 |
| fringepod | 1 |
| Frying pan prickly pear | 2 |
| fullstem | 6 |
| Funnel lily | 2 |
| Galleta | 2 |
| Galleta grass, curlygrass | 1 |
| Galleta or curly grass | 5 |
| Galleta or curlygrass | 1 |
| Galleta, curly grass | 1 |
| Galleta, curlygrass | 2 |
| Gambel oak | 6 |
| Gambel's oak | 2 |
| Gambel's oak, scrub oak | 1 |
| garden parsley | 1 |
| Gardner's saltbush | 3 |
| Garrett's beardtongue | 1 |
| Garrett's bladderpod | 1 |
| Garrett's penstemon | 1 |
| Garrett's weedy milkvetch | 8 |
| Gay witche's hair | 1 |
| Gerer's willow | 1 |
| German-madwort | 1 |
| Geyer willow | 1 |
| Geyer's larkspur | 1 |
| Geyer's onion | 1 |
| Geyer's willow | 8 |
| giant biscuitroot | 5 |
| Giant blazingstar, beautiful blazingstar | 1 |
| Giant dropseed | 2 |
| Giant Lousewort | 2 |
| giant red Indian paintbrush | 1 |
| Giant sequoia | 1 |
| Gibralter candytuft | 1 |
| Gierisch's globemallow | 1 |
| Gilbert's yucca | 2 |
| Glaborus penstemon | 1 |
| Glabrate cinquefoil | 2 |
| Glabrous penstemon | 3 |
| Glacier lily | 2 |
| Glandular birch | 7 |
| Glandular bitterbrush | 1 |
| Glandular cinqefoil | 1 |
| Glandular cinquefoil | 15 |
| Glandular indigo bush | 1 |
| Glandular indigo-bush | 1 |
| Glandular indigobush, dotted dalea | 1 |
| Glandular willowherb | 4 |
| Glandweed | 1 |
| Glass milkvetch | 1 |
| Glaucus willow | 4 |
| Globe candytuff | 1 |
| Globe mallow | 1 |
| Glorious blazing star | 1 |
| Glorious blazingstar | 3 |
| Goats beard | 2 |
| Goatsbeard | 2 |
| gold cobblestone lichen | 1 |
| Golden bell forsythia | 1 |
| Golden buckwheat | 1 |
| Golden corydalis | 16 |
| Golden corydalis, scrambled eggs | 1 |
| Golden crownbeard | 1 |
| Golden cryptanth | 15 |
| Golden currant | 11 |
| Golden currant, Lewis' currant | 1 |
| Golden current | 2 |
| Golden dock | 2 |
| Golden draba | 4 |
| Golden gilia | 1 |
| Golden mariposa | 3 |
| Golden pea | 10 |
| Golden pea, buffalo bean | 1 |
| Golden pea, yellow pea | 2 |
| Golden pea, yellowpea | 1 |
| Golden rain tree | 1 |
| Golden sedge | 6 |
| Goldeneye cryptanth | 1 |
| Goldenrain tree | 1 |
| Goodding's tansyaster | 4 |
| Goodding's vervain | 2 |
| Gooding's vervain | 2 |
| Goodrich's fleabane | 1 |
| Goosberry-leaf globemallow | 1 |
| Goose grass | 1 |
| Gooseberry currant | 15 |
| Gooseberry globemallow | 1 |
| Gooseberry-leaf glabemallow | 1 |
| Gooseberry-leaf globemallow | 11 |
| Gooseberry-leaf globmallow | 2 |
| goosefoot violet | 1 |
| Goosefoot yellow violet | 3 |
| Gordon's buckwheat | 1
|
