Dirinaria aegialita (Afzel. ex Ach.) B.J.Moore

Family :

Physciaceae

Moore. Bryologist 71: 248. 1968

Basionym: Parmelia aegialita Afzelius in Acharius, Meth. Lich.: 191. 1803

ID :

BU/BRL/2022/004

Thallus :

Foliose, loosely appressed, up to 12 cm in diam., pinnately or sub pinnately lobate

Lobes :

Radiating, confluent, flat or convex but usually concave towards the lobe tips, rarely convex throughout, 0.2-3 mm wide, distinctly flabellate towards the lobe tips

Upper Side:

Gray, bluish gray, almost white or stramineous, slightly pruinose or without a pruina

Isidia :

Finally sorediate polysidiangia present, developing from isidia-like outgrowths, bursting open and revealing soredia, finally apically crateriform pseudocyphellae: distinct, laminal and marginal, usually restricted to the peripheral parts of the lobes, sometimes reticulately confluent 

Lower Side :

Black in center, paler towards lobe tips, erhizinate 

Medulla :

White, the lowest part often orange, especially towards the lobe tips 

Rare, laminal on thallus, 0.5-1.5 mm wide disc: black, slightly grayish pruinose but mostly without a pruina 

Apothecia :

Brown, 1-septate, ellipsoid, 16-22 x 7-9 µm Pycnidia: immersed in warts conidia: bacilliform, 4-5 x 0.8-1 µm

Ascospores :

Upper cortex K+ yellow, C-, KC-, P+ yellow; medulla upper and lower part K-, C-, KC-, P- Secondary metabolites: upper cortex with atranorin, medulla with divaricatic acid and few terpenes in low concentration

Chemistry :