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

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Acdemia Arena 2010, Supplement 0201 http://www.sciencepub.net 3b Photobiont stratified, thallus eteromerous……………………… 4 4a Thallus corticated on both surfaces……………………………… 5 4b Thallus corticated in upper surfaces only……………………….. 6 5a Thallus cyphellate, cyphellae in lower surface………………... Sticta 5b Thallus lacking cephellae……………………………………… Lobaria 6a Apothecia marginal to submarginal, lower surface with veins & pascicalate rhizines…………………………………………….. Peltigera 6b Apothecia laminal, lower surface lacking veins………………… Parmelinella 7a Apothecia nephromoid on lobe ends, thallus cetrarioid…………. 8 7b Apothecia laminal or marginal, not nephromoid, thallus parmelioid or physcioid………………………………………… 11 8a Upper cortex containing usnic acid……………………………… 9 8b Upper cortex lacking usnic acid………………………………… 10 9a Apothecia mainly laminal, conidia bacillariform……………… Cetrariopsis 9b Apothecia mainly marginal & submarginal, conidia filiform….. Allocetraria 10a 10b Thallus erect, fruticose or sub fruticose, lobes canaliculate, lower surface without rhizomes, terricolous, conidia oblong citriform… Thallus adnate, foliose, lobes not canaliculate, lower surface normally with rhizomes, corticolous, lobe margins ciliate……… Cetrelia Cetrelia 11a Thallus parmelioid……………………………………………… 12 11b Thallus physioid………………………………………………… 22 12a Thallus pseudocyphellate……………………………………… 13 12b Thallus lacking pseudocyphellate……………………………… 14 13a 13b Thallus enaculate, pseudocyphellae punctiform, rhizines on lower surface reaching up to edge of lobes, medulla K+ red…… Thallus enaculate, pseudocyphellae punctiform, rhizines on lower surface not reaching up to edge of lobes, medulla K-…… Parmelia Punctelia 14a Thallus ciliate………………………………………………….. 15 14b Thallus lacking cilia…………………………………………… 21 41
Acdemia Arena 2010, Supplement 0201 http://www.sciencepub.net 15a Thallus with bulbate cilia along margins……………………… Bulbothrix 15b Thallus with simple cilia along margin………………………….. 16 16a Rhizines dichotomously branched……………………………… Hypotrachyna 16b Rhizines simple or squarrosely branched……………………… 17 17a Rhizines restricted in the central part of lower surface………… 18 17b Rhizines present throughout the lower surface………………… 19 18a 18b 19a Upper surface emaculate, or if maculate, maculae neither forming effigurate nor forming reticulate cracks……………… Upper surface white maculate, maculae forming reticulate cracks………………………………………………………….. Thallus lobes narrow, linearly elongate, canaliculate, dichotomous.................................................................................. Parmotrema Rimelia Everniastrum 19b Thallus lobes otherwise………………………………………… 20 20a 20b 21a Upper surface with effigurate maculae, cilia robust, Markedly tapered, commonly furcate, conidia pliform…………………… Upper surface emaculate or with spotted maculae, cilia slender, not markedly tapered, simple, conidial cylindrical or bifusiform Rhizomes simple to squarrosely branched, leaving a narrow bare marginal zone less than 2mm wide……………………………. Canomachlina Myelochora Canoparmelia 21b Rhizomes dichotomously branched up to margin……………… Hypotrachyna 22a Upper cortex composed of longitudinally disposed compact hyphae, as seen in VLS of thallus……………………………… Heterodermia 22b Upper cortex vertically disposed, conglutinate hyphae, cellular (paraplectinchymatous) in cross section in any direction……… 23 23a Hypothecium brown to dark brown…………………………… Pyxine 23b Hypothecium hyaline to yellow………………………………… 24 24a Thallus grey brown, K- (atranorin absent)……………………… Phaeophyscia 24b Thallus glaucous grey to grey, K+ Yyellow (atranorin present)… Group IV Physcia 42
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