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Montana Field Guide

Montana Field Guides

Torrey Bitterweed - Hymenoxys torreyana
Other Names:  Tetraneuris torreyana

Potential Species of Concern

Global Rank: G4
State Rank: S3S4

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

External Links






 
General Description
Caudex branched, mat-forming. Stems simple, erect, scapose, 3–10 cm. Herbage punctate-glandular, villous on stem and leaf bases. Leaf blades narrowly oblanceolate, entire, 1–5, cm long. Heads solitary; involucres 7–11 mm high; phyllaries subequal, lanceolate to ovate, scarious-margined, glandular, villous. Ray ligules 7–11 mm long. Disk corollas 4–5 mm long, glandular. Achenes 3–4 mm long; pappus scales 5–7 (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Lesica (2012) treats this species in the genus Tetraneuris.

Species Range
Present
 


Range Comments
Carbon County, MT; WY, UT and CO (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Summary of Observations Submitted for Montana
Number of Observations: 35

(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
Open ridges and meadows at low to high elevations in the mountains, often on limestone-derived soil in juniper woodlands, mountain mahogany woodland, and cushion plant grasslands.

References
  • Additional ReferencesLegend:   View Online Publication
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    • Lesica, P. and P.L. Achuff. 1992. Distribution of vascular plant species of special concern and limited distribution in the Pryor Mountain desert, Carbon County, Montana. Unpublished report to the Bureau of Land Management. Montana Natural Heritage Program, Helena, MT. 105 pp.
    • Lesica, P., M. T. Lavin, and P. F. Stickney. 2012. Manual of Montana Vascular Plants. Fort Worth, TX: BRIT Press. viii + 771 p.
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Citation for data on this website:
Torrey Bitterweed — Hymenoxys torreyana.  Montana Field Guide.  .  Retrieved on , from