Ecological, Social and Commercial Role of Lichens in India with ...

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Acdemia Arena 2010, Supplement 0201 http://www.sciencepub.net 1a Thallus podetiate or pseudopodiate…………………………… 2 1b Thallus not podetiate, inflated…………………………………… Ramalina 2a Thallus podotia, pseudopotidia solid…………………………… 3 2b Thallus podetia or pseudopodia hollow, lacking central chondroid axis, poditia with squamules…………...…………… Cladonia 3a Thallus with a central chondroid axis within medulla………… Usnea 3b Thallus lacking central chondroid axis……………….………… 4 4a Thallus on rock, non-acidic soil or decaying debris…………… 5 4b Thallus on rock or wood, rarely on non-acidic soils, with sucate pseudocyphellae…………………………………………………. Sulcaria 5a 5b Thallus sterile, with distichous dendroid branches (pseudopodetia) and granular phyllocladia, cephalodia absent… Thallus fertile, pseudopodetia with brown to black terminal or lateral apothecia, cephalodia usually present…………………… Leprocaulon Stereocaulon Key to lichen species of Chopta 1 Thallus yellow, greenish yellow, yellow orange………………… 2 1a Thallus whitish or greenish grey, thin with calycin……………… Chryothrix sp 2 2a Thallus thin yellow without slight orange or greenish tinge or greenish yellow, granules minute 0.01-0.1 (0.2) mm diam, thallus K-, KC- or KC orange red P- or P+ orange……………………….. Thallus thick, vivid primary yellow, granules 0.1-0.2 mm diam, forming pulverulent mass, thallus K- or K+ fainting orange, C-, KC-, or KC+ red.............................................................................. C. candelaris C. chlorine 3 Scypni centrally proliferated……………………………………… Cladonia sp 3a Podetia with interior of scyphi open, axils olso open……………. C. squamosa 4 P+ red, primary squamules, 3X1.5 mm, persistent, podetia1oX70 (-130) mm tall, 1-2 mm in diam dichotomously or irregularly branched, cupless, apically attenuated, squamulles on podetia…… C. furcata 4a Podetia taller 20mm and above…………………………………… 5 5 Podetia 30-45mm tall, P+red, apices Subcorymbose……………... C. corymbescens 43
Acdemia Arena 2010, Supplement 0201 http://www.sciencepub.net 6 Thallus with tomentum of multicellular hyphal hairs, spore muriform…………………………………………………………... 7 7 Thallus isidiate……………………………………………………. 8 7a Thallus lacking isidia……………………………………………… 9 8 Thallus surafe distinctly wrinkled, bluish, lobes 3-9mm wide, isidia globular to clavate apothecia usually absent ………………. Leptogium papillosum 9 Whitish stiff trichomes present on thalline exciple………………. 10 9a Trichomes absent on thalline exciple…………………………… 11 10 11 11a 12 Apothecia sessile to constricted at base, upto 2mm diam trichomes robust and dense on exciple, thallus grey-brown to brown-black, lobes 8-12mm wide, spores 20-35X10-13µm……………………. Apothecia sessile to substipitate, up to 5 mm diam exciple thick, wrinkled with short trichomes, thick dark-brown to grey-black, lobes 3-20mm wide spores 25-34X8-12µm………………………. Apothecia stalk short, constricted, not lobular disc upto 4.5mm diam, thallus bluish-rgey to dark grey lobes 5-10 (-20) mm wide, smooth, spores 28-37X12-17µ……………………………………. Exciple complete (closed), variable in colour, totally black, lobia of exciple 4-12 sulcate at upper edge, sulcai black, nacked, not covered by hyphal tissue, lirellae emergent to dichotomously branched, spores 8-10 celled, 24-45X6-8µm……………………… L. trichophorum L. askotense L. pedicelatum Graphis sikkimensis 12a Exciple domidiate (deficient at base), black………………………. 13 13 Spores 8-16 celled, 25-50X4-9µm………………………………... G. scripta 14 Thallus leprose, granular, apothecia absent………......................... 15 14a Thallus leprose, granular, apothecia always present.. Lecanora sp1 15 Thallus K-, C-, PD………………………………………………… 16 16 16a Thallus having zeorin, greenish, granular without projecting hyphae …………………………………………………………... Thallus lacking zeorin, but having lecanoric like spot, which grey, with dense projecting hyphae…………………………………….. Lecanora sp2 17 Epihymenium of chlarotera type, zeorin absent………………….. 18 18 Thallus containing 2-0-methyl perlatoric acid apothecial disc pale 44 L. achroa
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