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Torrey Bitterweed - Hymenoxys torreyana
Other Names:
Tetraneuris torreyana
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 et al. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).
Lesica (2012) treats this species in the genus
Tetraneuris.
Species Range
Montana Range
Range Descriptions
Native
Range Comments
Carbon County, MT; WY, UT and CO (Lesica et al. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).
Observations in Montana Natural Heritage Program Database
Number of Observations: 67
(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.
Stewardship Responsibility
Based on the Montana Natural Heritage Program's latest
predicted habitat suitability model
| Total species' range in Montana |
3,203 km2 |
(<1% of Montana) |
Area predicted to have
some level of suitable habitat |
1,794 km2 |
(<1% of Montana) |
Stewardship responsibility for the predicted area of suitable habitat can be broken down as follows
| |
Total Suitable |
Moderate Suitability |
Low Suitability |
| Federal |
53% |
15% |
38% |
| State |
2% |
<1% |
2% |
| Local |
<1% |
|
<1% |
| Conservation Lands/Easements |
<1% |
|
<1% |
| Private/Tribal/Unknown |
44% |
1% |
43% |
See the Habitat Suitability for Biodiversity task in Map Viewer
for a more detailed look at stewardship responsibilities within a variety of local jurisdictions.
References
- Literature Cited AboveLegend:
View Online Publication- Lesica, P., M.T. Lavin, and P.F. Stickney. 2012. Manual of Montana Vascular Plants. Fort Worth, TX: BRIT Press. viii + 771 p.
- Additional ReferencesLegend: View Online Publication
Do you know of a citation we're missing?- 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. 2022. Manual of Montana Vascular Plants, Second Edition. Fort Worth, TX: BRIT Press. viii + 779 p.
- Web Search Engines for Articles on "Torrey Bitterweed"
