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Trichostema Linnaeus. Blue Curls.

Contributed by R. Kevan Schoonover McClelland

Key to Trichostema

A genus of about 25 species, short-lived shrubs and annual and perennial herbs, of temperate North America (especially diverse in w. North America, with a second center of diversity in se. North America, primarily FL). The genus is divided into six sections, quite disparate in morphology and chromosome number, of which one (section Trichostema) is endemic to eastern North America (and centered in the Southeast), four are endemic to western North America (BC to Mexico, and especially California), and one (section Isanthus) is mainly eastern, but disjunct in w. NE and AZ (McClelland & Weakley 2023).

Ref: Harley et al. In Kadereit (2004); Lewis (1945); McClelland & Weakley (2019) In Weakley et al. (2019a); McClelland & Weakley (2023) In Weakley et al. (2023); McClelland, Weakley, & Poindexter (2023). Show full citations.

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image of plant© Floyd A. Griffith | Trichostema setaceum | Original Image ⭷


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