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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 :
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