
Parmotrema mellissii (C.W. Dodge) Hale
Family :
Parmeliaceae
Hale, Phytologia 28: 337. 1974; Singh & Sinha 1994: 289.
Basionym: Parmelia mellissii C.W. Dodge, 1959
ID :
BU/BRL/2022/027
Thallus :
corticolous, saxicolous or terricolous, to 12 cm across;
Lobes :
4-15 mm wide, crenate or dissected, ciliate
Upper Side:
grey, emaculate, fissured, cortex flaking off in older parts
Isidia :
isidia marginal and submarginal, coralloid branched and ciliate or becoming sorediate (isidiate-sorediate)
Lower Side :
centrally black, narrow marginal zone brown to white mottled, nude
Medulla :
white, rarely ochraceous near lower cortex
rare, to 8 mm in diam., imperforate
Apothecia :
ascospores 17-25 x 10-16 µm; epispore 2 µm thick.
Ascospores :
Medulla (white part) K-, C-, KC+ red, P-; medulla (pigmented part) K+ purple. Alectoronic, a-collatolic acids present.
Chemistry :