Utah Valley University Herbarium


Accession # 15808 
Family - UVUAPG III FamilyCronquist FamilyA Utah Flora
Species Tetradymia canescens DC.
Common name   spineless horsebrush
Oliver Hansen   91  
Coll. Date 15 August 2010 
United States
Uinta County
Locality Uinta Mountains, NW slope of Cottonwood Mountain, FR072, ca. 4 miles N of Utah/Wyoming State line, E side of road;
     Elev.: 8821 ft. (2689 m.)
Habitat Notes sagebrush slope with perennial grasses. 
Climate NCDC temperatures, daily high (red), daily average (green) and daily low (blue), from 1970 to 2000 at this location.   NCDC average monthly precipitation from 1970 to 2000 at this location.
Latitude Longitude 41° 3'  27.54" N, 110° 21'  40.9" W
Datum WGS84 
Uncertainty Polygon diameter (with coordinate as origin): GPS
Georef. Notes This coordinate was obtained by a GPS unit and an error estimate was not recorded by the user. However due to the accuracy of most units, a polygon diameter between 25 and 250 meters could reasonably be assumed.
Voucher Senior Thesis Voucher for Henry's Fork and Vicinity Checklist, Block 19, northern Utah and southern Wyoming. 


Synonyms recognized by ITIS (bold taxon is currently accepted):

     Tetradymia canescens DC.

     Tetradymia canescens var. inermis (Rydb.) Payson

Common Name(s): gray horsebrush, spineless horsebrush.

Taxonomic Hierarchy: (ITIS TSN=38494, click for more information and references)

        Kingdom: Plantae
            Subkingdom: Tracheobionta
                Division: Magnoliophyta
                    Class: Magnoliopsida
                        Subclass: Asteridae
                            Order: Asterales
                                Family: Asteraceae
                                    Genus: Tetradymia
                                        Species: Tetradymia canescens


Available images of this specimen (click to view):
specimen image: 15808s1.jpg

Images of other samples of the same species:
specimen image: 02027s1.jpg 
specimen image: 02304s1.jpg 
specimen image: 03281s1.jpg 
specimen image: 04642s1.jpg 
specimen image: 09001s1.jpg 
specimen image: 11923c1.jpg 
specimen image: 11923d1.jpg 
specimen image: 11923s2.jpg 
specimen image: 15598s1.jpg 

Nearby Accessions

Other accessions in the database collected near this one:

Accession Name Dist., dir.
15721 Androsace septentrionalis      "pygmy-flowered rockjasmine" same section
15718 Antennaria dimorpha      "low pussytoes" same section
15732 Arabis holboellii      "Holboell's rockcress" 300 ft. NE
15805 Artemisia tridentata  var. vaseyana   "Vasey's big sagebrush" same section
15735 Astragalus argophyllus  var. martinii   "Martin's milkvetch" 300 ft. NE
15724 Astragalus spatulatus      "tufted milkvetch" same section
15807 Castilleja flava  var. flava   "yellow paintbrush" same section
15720 Cerastium arvense      "field chickweed" same section
15734 Delphinium nuttallianum      "meadow larkspur" 300 ft. NE
15723 Erigeron compositus  var. glabratus   "cut-leaf fleabane" same section
15806 Eriogonum umbellatum  var. majus   "sulphur-flowered wild buckwheat" same section
15736 Fritillaria atropurpurea      "leopard-lily" 300 ft. NE
15729 Mertensia fusiformis      "spindle-root bluebells" 300 ft. NE
15725 Oxytropis sericea  var. sericea   "white locoweed" same section
15722 Phlox multiflora      "mountain phlox" same section
15727 Pinus contorta  var. latifolia   "lodgepole pine" 324 ft. NW
15731 Poa fendleriana      "muttongrass" 300 ft. NE
15719 Poa secunda      "Sandberg's bluegrass" same section
15726 Selaginella densa      "lesser spikemoss" same section
15733 Senecio integerrimus  var. exaltatus   "Columbia ragwort" 300 ft. NE
15730 Shepherdia canadensis      "Canada buffaloberry" 300 ft. NE
15728 Viola nuttallii      "Nuttall's violet" 324 ft. NW


Nearby locations from the USGS Geographic Name Information System (GNIS) database:

Name County Dist., dir. Elevation (ft.) 7.5' Quad Name
Gourley Meadows (Flat) Uinta County, WY 2240 ft. SW 8600  Table Mountain 
Whiskey Spring (Spring) Uinta County, WY 1.6 mi. E 8770  Table Mountain 
Graham Reservoir Number 1 (Reservoir) Uinta County, WY 1.8 mi. NW 8452  Buck Fever Ridge 
Graham Dam (Dam) Uinta County, WY 1.8 mi. W 8455  Buck Fever Ridge 
Graham Reservoir (Reservoir) Uinta County, WY 1.8 mi. W 8455  Buck Fever Ridge 
Cottonwood Mountain (Summit) Uinta County, WY 2.2 mi. S 9321  Table Mountain 
Big Spring (Spring) Uinta County, WY 2.3 mi. NE 8741  Table Mountain 
Deadhorse State Hospital Camp (Locale) Uinta County, WY 2.8 mi. S 8931  Buck Fever Ridge 
Murray Ditch (Canal) Uinta County, WY 2.5 mi. NW 8317  Buck Fever Ridge 
Gilbert Creek (Stream) Uinta County, WY 2.3 mi. W   Bridger Lake 
Gilbert Creek (Stream) Summit County, UT 2.3 mi. W   Bridger Lake 
Deadhorse Park (Park) Uinta County, WY 3 mi. S 8888  Buck Fever Ridge 
Little Gilbert Creek (Stream) Uinta County, WY 2.7 mi. SW   Bridger Lake 
Little Gilbert Creek (Stream) Summit County, UT 2.7 mi. SW   Bridger Lake 
Slab Park (Park) Uinta County, WY 2.8 mi. SW 8744  Buck Fever Ridge 
Sage Creek Park (Flat) Uinta County, WY 3.4 mi. SE 9197  Table Mountain 
Rocky Springs (Spring) Uinta County, WY 3.8 mi. N 8019  Buck Fever Ridge 
Tipperary Dam (Dam) Uinta County, WY 3.6 mi. N 8196  Buck Fever Ridge 
Tipperary Reservoir (Reservoir) Uinta County, WY 3.6 mi. N 8196  Buck Fever Ridge 
Murray Reservoir (Reservoir) Uinta County, WY 3.6 mi. N 8196  Buck Fever Ridge 


Taxon Links for species Tetradymia canescens  DC.

CalPhotos, Berkeley Digital Library Project

CNPS Manual of California Vegetation Database

USDA Plants database
University of Washington Herbarium: Plants of Washington (images)

Texas A&M University: Image Library (images)

Lady Bird Johnson's Wildflower Center

Google Images

External link to this species in the UVU Herbarium:

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