Parmotrema praesorediosum (Nyl.) Hale

Family :

Parmeliaceae

Hale, Phytologia 28: 338. 1974; Singh & Sinha 1994: 291. 

Basionym: Parmelia praesorediosa Nylander, Sert. Lich. Trop. Labaun, Singapore: 18. 1891

ID :

BU/BRL/2022/028

Thallus :

saxicolous or corticolous, adnate, to 10 cm across

Lobes :

5-8 mm wide, eciliate

Upper Side:

grey to darker, emaculate, soralia usually marginal, linear or crescent-shaped

Isidia :

soredia granular

Lower Side :

centrally black, narrow marginal zone lighter tan, nude

Medulla :

white

4 mm in diam., imperforate

Apothecia :

ascospores 15-21 x 7-10 µm

Ascospores :

Medulla K-, Co, KC-, Po. Protopraesorediosic, praesorediosic and fatty acids present

Chemistry :