Tweedy's Gilia - Gilia tweedyi
Gilia sinuata var. tweedyi, Gilia inconspicua var. tweedyi
State Rank Reason (see State Rank above)
Gilia tweedyi is locally common on the south and west sides of the Pryor Mountains in the drainages of the Bighorn and Clarks Fork of the Yellowstone rivers and is also known from Beaverhead County.
Stems erect, 5–25 cm, usually branched above. Herbage loosely tomentose, stipitate-glandular especially above. Leaves: basal oblanceolate, 2–5 cm long, deeply pinnately lobed, lobes lance-linear, mucronate; cauline few. Inflorescence terminal, leafy-bracteate cymes with ascending pedicels. Flowers: calyx 3–5 mm long, purple spotted, swollen in fruit; corolla funnelform, blue, with a yellow throat, tube 4–5 mm long; lobes ca. 1 mm long. Capsule 4–5 mm long with several seeds per locule (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX)
Blooming in May and June.
OR to MT south to NV, ID and WY (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).
Observations in Montana Natural Heritage Program Database
Number of Observations:
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(Observations spanning multiple months or years are excluded from time charts)
Open, sandy soil in juniper woodlands, sagebrush and desert shrublands in the valleys and foothills.
As an annual, population sizes may undergo large annual fluctuations and may respond positively to light or moderate levels of disturbance.
- 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 Unpublished report to the Bureau of Land Management.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.
- Meier, G.A. 1997. The colonization of Montana roadsides by native and exotic plants. M.Sc. Thesis. Bozeman, MT: Montana State University. 45 p.
- Quire, R.L. 2013. The sagebrush steppe of Montana and southeastern Idaho shows evidence of high native plant diversity, stability, and resistance to the detrimental effects of nonnative plant species. M.Sc. Thesis. Bozeman, MT: Montana State University. 124 p.