Utah Valley University Herbarium


Accession # 15944 
Family - UVUAPG III FamilyCronquist FamilyA Utah Flora
Species Petrophytum caespitosum (Nutt.) Rydb.
Common name   rockmat
S. Hegji   161  
Coll. Date 27 September 2011 
United States
Tooele County
Locality Sheeprock Mountains, at the mouth of Harker Canyon;
     Elev.: 6576 ft. (2005 m.)
Habitat Notes Rocky hillside, burned-out Juniper forest, with low forbs, 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 39° 59'  25.66" N, 112° 28'  28.78" 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.


No synonyms recognized in the ITIS database.


Available images of this specimen (click to view):
specimen image: 15944a1.jpg specimen image: 15944b1.jpg specimen image: 15944c1.jpg specimen image: 15944d1.jpg
specimen image: 15944s1.jpg

Images of other samples of the same species:
specimen image: 04180s1.jpg 
specimen image: 04380s1.jpg 
specimen image: 04615s1.jpg 
specimen image: 05010s1.jpg 
specimen image: 07798s1.jpg 
specimen image: 08637s1.jpg 
specimen image: 11665d1.jpg 
specimen image: 11665s1.jpg 
specimen image: 12283a1.jpg 
specimen image: 12283b1.jpg 
specimen image: 12283s1.jpg 
specimen image: 12341s2.jpg 
specimen image: 12341a1.jpg 
specimen image: 12341b1.jpg 
specimen image: 12341c1.jpg 
specimen image: 12566s2.jpg 

Nearby Accessions

Other accessions in the database collected near this one:

Accession Name Dist., dir.
15925 Aconitum columbianum      "western monkshood" 1.5 mi. SE
15854 Alyssum desertorum      "desert madwort" 552 ft. SW
15897 Alyssum desertorum      "desert madwort" 561 ft. SW
15898 Amelanchier utahensis      "Utah serviceberry" 551 ft. SW
18079 Angelica wheeleri      "Wheeler's angelica" same section
15926 Aquilegia formosa      "western columbine" 1.5 mi. SE
15928 Arenaria lanuginosa      "spreading sandwort" 1.5 mi. SE
15940 Argemone munita      "flatbud pricklypoppy" 2274 ft. NW
18082 Aster ascendens      "western aster" 1.2 mi. SE
15911 Balsamorhiza sagittata      "arrow-leaf balsamroot" 1.1 mi. SE
15853 Cercocarpus ledifolius      "curl-leaf mountain mahogany" 533 ft. SW
15946 Chrysothamnus nauseosus  var. hololeucus   "gray-stem rubber rabbitbrush" 1.3 mi. SE
15852 Cymopterus longipes      "long-stalked spring parsley" 653 ft. W
18080 Epilobium halleanum      "glandular willowherb" same section
18086 Equisetum laevigatum      "smooth horsetail" 1.5 mi. SE
15896 Eremogone loisiae      "Lois' sandwort" 671 ft. W
15943 Eriogonum microthecum      "slender wild buckwheat" 370 ft. W
15947 Eriogonum racemosum      "redroot wild buckwheat" same section
15912 Erythronium grandiflorum      "yellow glacier-lily" same section
18081 Helianthus annuus      "common sunflower" 1.2 mi. SE
15909 Lithophragma glabrum      "bulbous woodland-star" 1.1 mi. SE
15910 Lithophragma parviflorum      "small-flowered woodland-star" 1.1 mi. SE
18084 Marchantia polymorpha     1.4 mi. SE
15945 Mentha arvensis      "wild mint" 1.5 mi. SE
15927 Mimulus guttatus      "common monkeyflower" 1.5 mi. SE
15895 Penstemon humilis  var. brevifolius   "short-leaf low beardtongue" 876 ft. NW
18078 Populus tremuloides      "quaking aspen" 2885 ft. S
18083 Ranunculus cymbalaria      "alkali buttercup" 1.4 mi. SE
15855 Salix       "willow" 788 ft. W
15899 Salix bebbiana      "Bebb willow" 788 ft. W
18085 Salix eriocephala  var. watsonii  1.5 mi. SE
15924 Sidalcea oregana      "Oregon checkerbloom" same section
18077 Symphoricarpos oreophilus      "mountain snowberry" 1991 ft. S
18076 Tetradymia canescens      "spineless horsebrush" 911 ft. SW
15908 Viola nuttallii      "Nuttall's violet" 1.1 mi. SE


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

Name County Dist., dir. Elevation (ft.) 7.5' Quad Name
Harker Canyon (Valley) Tooele County, UT 704 ft. E   Erickson Knoll 
Lion Hill (Summit) Tooele County, UT 1.5 mi. W 6890  Erickson Knoll 
Lion Hill Spring (Spring) Tooele County, UT 1.6 mi. W 6716  Erickson Knoll 
Dutch Peak (Summit) Tooele County, UT 2.5 mi. S 8816  Dutch Peak 
Sheeprock Mountains (Range) Tooele County, UT 2.8 mi. S 8114  Dutch Peak 
Wasatch National Forest-Vernon Division (Forest) Tooele County, UT 2.2 mi. E 6119  Dutch Peak 
Grove Hollow (Valley) Tooele County, UT 2.3 mi. E   Dutch Peak 
Black Peak (Summit) Tooele County, UT 3 mi. S 8882  Dutch Peak 
Stepladder Trough (Flat) Tooele County, UT 3 mi. NW 6086  Lookout Pass 
North Pine Canyon (Valley) Tooele County, UT 2.8 mi. NW   Erickson Knoll 
Greens Ridge (Ridge) Tooele County, UT 3.6 mi. S 8327  Dutch Peak 
Snow Hollow (Valley) Tooele County, UT 2.9 mi. E   Dutch Peak 
Benmore Experiment Station (Locale) Tooele County, UT 3.1 mi. NE 5975  Vernon 
Hilltop Mine (Mine) Tooele County, UT 3.1 mi. W 8816  Erickson Knoll 
Benmore Experimental Pastures (Flat) Tooele County, UT 3.6 mi. NE 5791  Vernon 
Benmore Guard Station (Locale) Tooele County, UT 3.2 mi. NE 5965  Vernon 
Rock Canyon (Valley) Tooele County, UT 3.1 mi. W   Erickson Knoll 
Benmore (Locale) Tooele County, UT 3.2 mi. NE 5965  Vernon 
Upper Pine Grove (Woods) Tooele County, UT 3.4 mi. SW 8140  Erickson Knoll 
Lower Pine Grove (Woods) Tooele County, UT 3.7 mi. SW 7740  Erickson Knoll 


Taxon Links for species Petrophytum caespitosum  (Nutt.) Rydb.

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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