Utah Valley University Herbarium


Accession # 09181 
Family - UVUAPG III FamilyCronquist FamilyA Utah Flora
Species Asclepias subverticillata (A. Gray) Vail
Common name   horsetail milkweed
S.L. Welsh   27775  
   with N.D. Atwood, J. Spencer
Coll. Date 28 August 2000 
United States
Kane County
Locality Skutumpah Terrace, E of head of Johnson Canyon.
     Elev.: 6450 ft. (1966 m.)
Habitat Notes roadside alluvium. 
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 37° 20'  53" N, 111° 26'  45" W
Datum Not recorded
Uncertainty Not calculated


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

     Asclepias subverticillata (Gray) Vail

     Asclepias galioides auct. non Kunth

Common Name(s): horsetail milkweed, poison milkweed, W. whorled milkweed, western whorled milkweed, whorled milkweed.

Taxonomic Hierarchy: (ITIS TSN=30308, click for more information and references)

        Kingdom: Plantae
            Subkingdom: Tracheobionta
                Division: Magnoliophyta
                    Class: Magnoliopsida
                        Subclass: Asteridae
                            Order: Gentianales
                                Family: Asclepiadaceae
                                    Genus: Asclepias
                                        Species: Asclepias subverticillata


Available images of this specimen (click to view):
specimen image: 09181s2.jpg

Images of other samples of the same species:
specimen image: 06281s3.jpg 
specimen image: 06421s2.jpg 
specimen image: 11995d1.jpg 
specimen image: 11995s1.jpg 

Nearby Accessions

  There are no nearby accessions.


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

Name County Dist., dir. Elevation (ft.) 7.5' Quad Name
Dry Wash (Valley) Kane County, UT 3.9 mi. S   Petes Cove 
Whities Canyon (Valley) Kane County, UT 3.9 mi. S   Ship Mountain Point 
Dry Bench (Bench) Kane County, UT 3.4 mi. W 5259  Ship Mountain Point 
Needle Eye Canyon (Valley) Kane County, UT 4.3 mi. S   Needle Eye Point 
Button Canyon (Valley) Kane County, UT 4.2 mi. N   Collet Top 
Surprise Valley (Valley) Kane County, UT 3.7 mi. SE   Needle Eye Point 
Needle Eye Point (Cape) Kane County, UT 4.4 mi. S 5174  Needle Eye Point 
Drip Tank Canyon (Valley) Kane County, UT 4 mi. SW   Ship Mountain Point 
Bullberry Creek (Stream) Wayne County, UT 4.9 mi. SW   Government Point 
Shute Point (Cape) Kane County, UT 5.3 mi. S 5269  Needle Eye Point 
Caine Bench (Bench) Kane County, UT 4.6 mi. W 5309  Ship Mountain Point 
Cigar Creek Canyon (Valley) Kane County, UT 5.6 mi. N   Collet Top 
Window Sash Bench (Bench) Kane County, UT 5.5 mi. N 6290  Collet Top 
Needle Eye Water (Spring) Kane County, UT 5.7 mi. S 5305  Needle Eye Point 
Pilot Knoll (Summit) Kane County, UT 6.2 mi. SW 5624  Ship Mountain Point 


Taxon Links for species Asclepias subverticillata  (A. Gray) Vail

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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