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Fo<br />
R<br />
Heterodermia hypochraea<br />
Heterodermia isidiophora<br />
C<br />
Fo<br />
Physciaceae<br />
Description Foliose. Lobes are slightly disjunct, convex, and ascending, with<br />
short lateral branches. The upper surface is whitish greenish grey and is uneven<br />
in thickness. The lower surface is yellow to orange. Isidia and soredia are absent.<br />
Apothecia are apically (tip) or subapically stipitate (stipe / stalk <strong>of</strong> anascomata,<br />
having a stipe or a stipes), margin <strong>of</strong> the thalline exciple is lobulate, inner surface<br />
<strong>of</strong> lobules pigmented. (refer the 2 nd picture).<br />
Status Rare. This species is restricted to few localities in <strong>Sri</strong> <strong>Lanka</strong>.<br />
Habitat Corticolous, seen on twigs in both humid and dry conditions. Above<br />
1000m, in wet upper montane forests.<br />
Locations Fishing hut - Peak Wilderness and Hunuwala Kanda- Matale district.<br />
Description Foliose. The thallus is corticolous and branched. The lobes are wide.<br />
The upper surface is greyish white, densely isidiate. Lower surface has a cortex<br />
and rhizines. Apothecia are not found in <strong>Sri</strong> <strong>Lanka</strong>n material.<br />
Status Common species.<br />
Habitat Found mostly on bark, but has also been occasionally observed on<br />
rocks. Above 900 m, in submontane to upper montane forests. Seen in moist,<br />
humid conditions.<br />
Locations Knuckles mountain region, Pattipola, Unulugala mountain peak,<br />
Fishing hut, Peak wilderness, and Kabaragala mountain.<br />
Physciaceae<br />
86 <strong>Fascinating</strong> <strong>Lichens</strong> <strong>of</strong> <strong>Sri</strong> <strong>Lanka</strong><br />
<strong>Fascinating</strong> <strong>Lichens</strong> <strong>of</strong> <strong>Sri</strong> <strong>Lanka</strong> 87
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