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Rare Plant Field Guide




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Photo Copyright © 1999 by S. Spackman

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Asteraceae (Sunflower Family)

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Synonym: Parthenium tetraneuris

Look Alikes: B. alpina has glabrous achenes and is only known from Weld Co. The three veins in the leaves of B. tetraneuris distinguish this species from similar cushion plants in its habitat.

Flowering/Fruiting Period: April-May/late May-June.

Habitat: Tops of cliffs and bluffs of a variety of rock types; in open pinyon-juniper stands. Elev. 4800-5600 ft.

Photo Copyright © 1999 by S. Spackman
Distribution: New Mexico and Colorado (Chaffee, Costilla, Fremont, Las Animas and Pueblo Cos.).

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References: Barneby 1947; O’Kane 1988; Peterson 1983d; Spackman and Floyd 1996.



Please send comments to: Colorado Natural Heritage Program
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