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Montana Field Guide

Montana Field Guides

Richardson's Bitterweed - Hymenoxys richardsonii


Global Rank: G5
State Rank: S4S5

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

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General Description
Caudex usually branched. Stems erect, often branched above, 5–20 cm. Herbage glandular-punctate, villous, sparsely so above the base. Leaves basal and cauline, 1–15 cm long; blades pinnately divided into 3 or 5 remote, linear segments. Heads 1 to 5; involucres 5–10 mm high; phyllaries villous, glandular, in 2 unequal series; outer lanceolate, united at the base; inner obovate, mucronate. Rays 8 to 14; ligules 7–15 mm long, glandular. Disk corollas 3–4 mm long, glandular. Achenes 2–3 mm long; pappus scales 5 to 6 (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Our plants are variety richardsonii.

Species Range
Present
 


Range Comments
AB, SK south to AZ, NM and TX (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Summary of Observations Submitted for Montana
Number of Observations: 88

(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
Usually barren, heavy soil of grasslands, sagebrush steppe, coniferous woodlands, barren slopes; 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:
Richardson's Bitterweed — Hymenoxys richardsonii.  Montana Field Guide.  .  Retrieved on , from