E-Flora BC: Electronic Atlas of the Flora of British Columbia

Trichostema oblongum Benth.
mountain blue-curls (oblong bluecurls)
Lamiaceae (Mint family)

Introduction to Vascular Plants

© Curtis Bjork  Email the photographer   (Photo ID #21991)

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Distribution of Trichostema oblongum
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Species Information

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Annual herb from a taproot; stems 10-50 cm tall, simple or branched especially below, hairy, sometimes glandular, 4-angled.
Opposite, broadly elliptic, 1.5-5 cm long, 5-20 mm wide, length less than 4X width, tips rounded to somewhat pointed; stalks less than 5 mm long.
Inflorescence of short, one-sided, axillary clusters; corollas tubular, blue, the tube 2-3.5 mm long, curved gradually upward, 5-lobed, the lowest 2-3.5 mm long, the other 4 about equal and slightly more than 1/2 as long as the lowest; calyces 1.5-3 mm long, the teeth about equal, more than twice the length of tube, hairy, long-pointed.
Nutlets, 4, joined in lower 1/3, irregularly ridged.

Source: The Illustrated Flora of British Columbia

Habitat / Range

Moist to wet seepage slopes and disturbed areas in the lower montane zone; rare in SE BC, known only from the Castlegar area; S to NV and CA.

Source: The Illustrated Flora of British Columbia


The climate type for this species, as reported in the: "British Columbia plant species codes and selected attributes. Version 6 Database" (Meidinger et al. 2008), is not evaluated, unknown or variable.

Taxonomic and Nomenclatural Links

Additional Photo Sources

General References