U.S. DEPARTMENT OF THE INTERIORBUREAU OF LAND MANAGEMENT
 
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Yellow-Twist Horsehair
(Bryoria tortuosa )
Parmeliaceae

Yellow-Twist Horsehair
Photo by Sylvia and Stephen Sharnoff

Description: A pendent, filamentous lichen, 4 to 12 inches (10-30 cm) long.  The color is dull, dark, reddish-brown to duskey yellow-brown or occasionally bright greenish yellow.  It frequently has tiny greenish-yellow strips.  Branches are uneven in diameter, strongly twisted and toruous, minutely pitted and often flattened; 0.4-1 mm in diameter.  This lichen looks like long, matted auburn hair.

Distribution: In California, it is found in the Northwestern California & Cascade Ranges Floristic Provinces.

Habitat: On trunks and branches of trees in well-lit, open stands, most prequently on oaks and pines, although it has been collected on a large variety of trees and shrubs.

Flowering Period: This species relies predominantly on thallus fragmentation, a form of vegetative propagation, for reproduction.

Similar Plants: Bryoria fremontii

Status: BLM Sensitive

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Field Office: Arcata, Redding

 
Last updated: 08-05-2010