Bractless Hedge-hyssop - Gratiola ebracteata
State Rank Reason (see State Rank above)
Rare and peripheral in Montana. Currently known from approximately a half-dozen wetlands along the Rocky Mountain Front and from a couple historical collections. Available data for the species are limited. However, threats to existing populations appear to be minimal. As an annual, population levels likely fluctuate widely from year to year.
Bractless Hedge-hyssop is a glabrous annual with an erect, simple or branched stem that is 5-15 cm high. The opposite, long-pointed, lance-shaped leaves are 1-4 cm long, have entire margins, and lack petioles. Long-stalked flowers arise from the leaf axils. The 5 long-pointed, lance-shaped sepals are often over 1 cm long. The white to yellow corolla is 5-7 mm long, has a short upper lip, and a 3-lobed lower lip. The seed capsule is globose and 4-5 mm high.
Flowering late June-August.
The calyx of Gratiola neglecta is subtended by 2 bracts and thus appears to have 7 lobes rather than 5; these lobes are rarely greater than 7 mm long.
BC, MT south to CA (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)
Drying mud around ponds in the foothills and on the plains.
- Additional ReferencesLegend: View Online Publication
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- Lesica, P. 1991. The Rare Vascular Plants of Pine Butte Swamp Preserve. Unpublished Report to the Nature Conservancy. 15 Pp.
- Lesica, P., M.T. Lavin, and P.F. Stickney. 2012. Manual of Montana Vascular Plants. Fort Worth, TX: BRIT Press. viii + 771 p.