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Montana Field Guide

Montana Field Guides

Showy Milkweed - Asclepias speciosa


Global Rank: G5
State Rank: S5

Agency Status
USFWS:
USFS:
BLM:
MNPS Threat Rank:
C-value: 3

External Links






 
General Description
Rhizomatous. Stems simple, 50–100 cm. Herbage tomentose. Leaves opposite, ascending to spreading; blades lanceolate to ovate, sometimes cordate-based, 5–20 cm. Umbels of 10 to 40 flowers; peduncles 2–8 cm long. Flowers 15–25 mm high; sepals tomentose, 3–6 mm long; petals rose, 7–12 mm long, pubescent; gynostegium pinkish, glabrous, 2–4 mm high; hoods lanceolate, spreading, 8–15 mm long; horns exserted, strongly curved. Follicles erect to ascending, ovoid, tuberculate, tomentose, 5–10 cm long (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Species Range
Present
 


Range Comments
BC to MB south to CA, NM, TX and IL (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Summary of Observations Submitted for Montana
Number of Observations: 20

(Click on the following maps and charts to see full sized version) Map Help and Descriptions
Relative Density

Recency

 

(Observations spanning multiple months or years are excluded from time charts)



Habitat
Grasslands, meadows, fields, roadsides, marshes; plains, valleys (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

References
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Citation for data on this website:
Showy Milkweed — Asclepias speciosa.  Montana Field Guide.  .  Retrieved on , from