Utah Valley University Herbarium


Accession # 12117 
Family - UVUAPG III FamilyCronquist FamilyA Utah Flora
Species Asclepias ruthiae Maguire
Common name   Ruth's milkweed
J.G. Harris   4154  
Coll. Date 12 May 2006 
United States
Emery County
Locality San Rafael Swell, Sids Mountain.
     Elev.: 6104 ft. (1861 m.)
Habitat Notes pinyon-juniper community, Carmel Formation, limestone. 
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° 5'  7" N, 110° 47'  43" 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.


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

     Asclepias uncialis ssp. ruthiae (Maguire) Kartesz & Gandhi

     Asclepias eastwoodiana Barneby
     Asclepias ruthiae Maguire
     Asclepias sanjuanensis Heil, J.M. Porter & Welsh
     Asclepias uncialis var. ruthiae (Maguire) E. Sundell

Common Name(s): Ruth's milkweed.

Taxonomic Hierarchy: (ITIS TSN=524889, click for more information and references)

        Kingdom: Plantae
            Subkingdom: Tracheobionta
                Division: Magnoliophyta
                    Class: Magnoliopsida
                        Subclass: Asteridae
                            Order: Gentianales
                                Family: Asclepiadaceae
                                    Genus: Asclepias
                                        Species: Asclepias uncialis
                                            Subspecies: Asclepias uncialis ssp. ruthiae


Available images of this specimen (click to view):
specimen image: 12117s1.jpg specimen image: 12117a1.jpg

Images of other samples of the same species:
specimen image: 01066s2.jpg 
specimen image: 03955s2.jpg 
specimen image: 06548s2.jpg 
specimen image: 09598s2.jpg 
specimen image: 10910s1.jpg 
specimen image: 10927s2.jpg 
specimen image: 10927f1.jpg 
specimen image: 12094b1.jpg 
specimen image: 12094a1.jpg 
specimen image: 12094s2.jpg 
specimen image: 12094c1.jpg 

Nearby Accessions

Other accessions in the database collected near this one:

Accession Name Dist., dir.
12112 Astragalus cymboides      "canoe milkvetch" same section
00385 Astragalus utahensis      "Utah milkvetch" 1.1 mi. W
00323 Castilleja scabrida  var. scabrida   "rough paintbrush" 1.1 mi. W
12113 Chamaechaenactis scaposa      "fullstem" same section
12115 Hymenoxys acaulis  var. arizonica   "Arizona four-nerve daisy" same section
12116 Physaria rectipes      "straight bladderpod" same section
12114 Streptanthus cordatus  var. cordatus   "heart-leaf twistflower" same section


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

Name County Dist., dir. Elevation (ft.) 7.5' Quad Name
North Salt Wash (Valley) Emery County, UT 0.9 mi. W   Short Canyon 
Virgin Spring Canyon (Valley) Emery County, UT 1 mi. E   Sids Mountain 
Wedge Pond Number 2 (Lake) Emery County, UT 1.5 mi. N 5978  Sids Mountain 
Wedge Pond Number 4 (Lake) Emery County, UT 2.6 mi. NE 6132  Sids Mountain 
Chalk Hills (Summit) Emery County, UT 3.1 mi. N 5758  Buckhorn Reservoir 
Sids Mountain (Summit) Emery County, UT 3.2 mi. S 6457  Sids Mountain 
Wedge Pond Number 1 (Lake) Emery County, UT 3.5 mi. N 5843  Buckhorn Reservoir 
Little Wedge Plateau (Plain) Emery County, UT 2.9 mi. W 5568  Sids Mountain 
Wedge Overlook (Locale) Emery County, UT 3.7 mi. N 5919  Buckhorn Reservoir 
Saddle Horse Canyon (Valley) Emery County, UT 3.2 mi. SW   The Blocks 
Cane Wash (Valley) Emery County, UT 3.5 mi. E   The Blocks 
Little Grand Canyon (Valley) Emery County, UT 3.6 mi. E   Sids Mountain 
Good Water Canyon (Valley) Emery County, UT 3.6 mi. E   Bottleneck Peak 
The Wedge Overlook (Locale) Emery County, UT 3.7 mi. NE 6178  Bottleneck Peak 
Fuller Bottom (Flat) Emery County, UT 3.8 mi. NW 5259  Sids Mountain 
Fuller Bottom Draw (Valley) Emery County, UT 4.1 mi. NW   Buckhorn Reservoir 
The Red Ledges (Cliff) Emery County, UT 4.6 mi. N 5496  Buckhorn Reservoir 
No Mans Mountain (Summit) Emery County, UT 4.5 mi. SE 6526  Bottleneck Peak 
Cloyds Pond (Lake) Emery County, UT 4.9 mi. N 5722  Buckhorn Reservoir 
McCarty Canyon (Valley) Emery County, UT 4.2 mi. SW   The Blocks 


Taxon Links for species Asclepias ruthiae  Maguire

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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