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19.
Peltigera rufescens [reddish]. |
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This
Peltigera is very common in dry forests. It never seems to
produce apothecia, and the thallus is thick and rigid, gray-brown,
the lobes with upturned margins. The algal layer is blue-green,
hence the thallus does not become green when wet. A gray cobwebby
weft occurs on the younger parts of the thallus. The underside has
a network of raised veins, with white rhizines occurring along
them. |
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20.
Peltigera venosa [veiny]. |
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A neat
little Peltigera containing green algal cells, hence green
when wet. The apothecia are circular, on the ends of the broad
lobes. The underside of the thallus is white with conspicuous brown
veins. Commonly occurring on naked soil banks along trails and
forest roads. |
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