Department of Botany,
Bharathiar University, Coimbatore - 641 046
Dirinaria applanata (Fée) D.D.Awasthi
Family :
Physciaceae
Awasthi & Agarwal. J. Indian Bot. Soc. 49: 135. 1970
Basionym: Parmelia applanata Fee. Essai Crypt. Ecorc. Offic. : 126. 1824
ID :
BU/BRL/2022/005
Thallus :
Foliose, appressed to agglutinated, loosely appressed at the lobe tips, up to 6 cm in diam., pinnately or sub pinnately lobate
Lobes :
Radiating, confluent, flat or convex, but sometimes concave towards the lobe tips, 0.5-2 mm wide, distinctly flabellate towards the lobe tips
Upper Side:
Gray, bluish gray or almost white, with a punctiform, rarely patchy white pruina or epruinose, sorediate
Isidia :
Farinose, in laminal, globose or elongated soralia pseudocyphellae: distinct, marginal, rarely also laminal, 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 sometimes orange, especially towards the lobe tips
Very rarely present, laminal on thallus, 0.5-1.5 mm wide disc: black, slightly grayish pruinose but mostly without a pruina
Apothecia :
Brown, 1-septate, narrowly ellipsoid, 15-22 x 6-8 µm Pycnidia: immersed in warts conidia: bacilliform, 3.5-5 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 :
