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Montana Field Guide

Montana Field Guides

Common Clammyweed - Polanisia dodecandra
Other Names:  Polanisia trachysperma


Global Rank: G5
State Rank: S4

Agency Status
USFWS:
USFS:
BLM:
MNPS Threat Rank:
C-value: 4

External Links






 
General Description
Glandular-hairy annual. Stems simple or branched below, 5–40 cm. Leaves petiolate, 3-foliolate; the leaflets narrowly elliptic, 1–5 cm long. Inflorescence with simple or 3-foliolate bracts. Flowers white to pink, slightly irregular; petals 5–11 mm long, clawed, the blade emarginate; sepals distinct, 2–3 mm long; stamens 12 to 27, ca. twice as long as petals. Fruit glandular-pubescent, broadly linear, 1–6 cm long, inflated, erect, short-stipitate (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Our plants are the western variety trachysperma (Torr.& A.Gray) H.H. Iltis

Species Range
Present
 


Range Comments
OR to QC south to CA, TX, MD and Mexico (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Summary of Observations Submitted for Montana
Number of Observations: 3

(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
Sparsely-vegetated, sandy to clayey soil of sagebrush and saltbush steppe, streambanks, roadsides; 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:
Common Clammyweed — Polanisia dodecandra.  Montana Field Guide.  .  Retrieved on , from