top of page

Hypotrachyna crenata (Kurok.) Hale

Family :


Hale, Phytologia 28: 34. 1974

Basionym: Parmelia crenata Kurok. in Hale & Kurokawa, Contr. U.S. Nat. Herb. 36:  168. 1964

ID :


Thallus :

Loosely attached, growing over mosses on rocks, yellowish glaucous to light mineral gray (R), 3-6 cm. in diameter

Lobes :

irregularly branched, more or less imbricate, rounded at the tips, 1.5 - 5.0 mm. wide, 90-110µ thick, the margins crenate

Upper Side:

Smooth, without maculae

Isidia :

Moderately Isidiate, the isidia short, less than 0.5 mm. high, often branched

Lower Side :

Black, pale brown in a narrow zone at the tips, sparsely rhizinate, the rhizines black, sparsely to moderately branched

Medulla :


Not seen

Apothecia :

Ascospores :

Thallus K+ yellow; medulla K+ yellow, C - , KC - , P + pale orange, atranorine and stictic acid present

Chemistry :

bottom of page