Phaeophyscia hirsuta (Mereschk.) Essl.

Family :

Physciaceae

Esslinger, Mycotaxon 7: 302. 1978   

Basionym: Physcia hirsuta Mereschkowsky, Ann. Conserv. lard. Bot. Geneve 21: 181.  1919

ID :

BU/BRL/2022/032

Thallus :

Foliose, up to 3(-4) cm in diam., irregular to more often orbicular

Lobes :

Linear and discrete to often irregularly rounded and partly imbricate, 0.5-1(-1.5) mm broad, usually +flat, prostrate

Upper Side:

Gray to gray-brown or brown, commonly but very inconsistently maculate, with sparse to numerous multicellular cortical hairs (15-20 µm wide at base and tapered to a point, 50150 µm long) near the lobe ends, epruinose and without distinctive epinecral layer, sorediate

Isidia :

Finely to somewhat coarsely granular, only rarely becoming pseudocorticate and isidioid, infrequently bearing multicellular hairs like those on the lobe ends (but smaller), in primarily marginal and terminal soralia that are short to elongate and linear, plane to +reflexed or even labriform to capitate

Lower Side :

black, sometimes paler at the lobe ends, dull; rhizines: simple, black

Medulla :

Upper cortex: paraplectenchymatous, Medulla: white, Lower cortex : Paraplectenchymatous

Infrequent but sometimes numerous, up to 2 mm in diam., sessile; margin: entire or occasionally lobulate, usually with cortical hairs like those on the lobe ends

Apothecia :

Ellipsoid, 18-25(-28) x 7-12(-14) µm, Physcia-type

Ascospores :

All negative in cortex and medulla Secondary metabolites: none detected

Chemistry :