Popular common name:
Wheel milkweed
Botanical Nomenclature:
Asclepias uncialis
Asclepias uncialis is a diminutive milkweed occurring in small colonies scattered along the eastern edge of the
southern Rocky Mountains. Occurrences are distributed in a westward trending arc from northeastern Colorado to
southeastern Arizona. Twenty extant occurrences within USDA Forest Service (USFS) Region 2 include one from the
Pawnee National Grassland and two from the Comanche National Grassland. Additional occurrences within Region
2 are known from Bureau of Land Management, Department of Defense, State of Colorado, and private lands. Ten
extant occurrences outside Region 2 are known from New Mexico, the Oklahoma panhandle, and Arizona. Decker, K. (2006, April 24). Asclepias uncialis Greene (wheel milkweed): a technical conservation assessment.
[Online]. USDA Forest Service, Rocky Mountain Region. Available: http://www.fs.fed.us/r2/projects/scp/
assessments/asclepiasuncialis.pdf [2024, October 25].
Unique Attributes of
Asclepias uncialis
1 Flower Color
Pink and White
2 Plant Height
<1 foot
3 USDA Zones
6b-8a
4 Bloom Timing
March, April, May
5 Light Preference
Full Sun
6 Soil Moisture
7 Soil Substraite
Sandstone derived from limestone or fine textured soil with fine rick chips. Not rocky soils. Level.
8 Ecoregion I/II
9 Soil Moisture
10 Difficulty Rank
🔴 Challenging
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