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Fo<br />
C<br />
Heterodermia japonica<br />
Heterodermia magellanica<br />
R<br />
Fo<br />
Physciaceae<br />
Description Foliose. The thallus is variable, irregular, and dichotomously lobate.<br />
Lobes sublinear, elongated, radiating, and widen towards the apices. The upper<br />
surface is greenish white, whitish to cream-coloured, and rarely brownish.<br />
Sorediate on lateral or terminal lobes, spreading along the lobe margin. The lower<br />
surface is white to brownish or bluish black, sparsely spotted with a brownish<br />
orange-red pigment towards the lobe apices. Rhizines are marginal and simple.<br />
Status Cosmopolitan. Widespread in tropical to subtropical areas, extending<br />
to warm temperate regions. Common in <strong>Sri</strong> <strong>Lanka</strong>, and is easily identified by<br />
the entangled mats <strong>of</strong> elongated linear lobes bearing long black cilia and the<br />
ecorticate lower surface.<br />
Habitat On tree trunks or on rocks in open and shady situations. Species is<br />
characterized by dull upper surface, “fan-like” lobe apices and a white to blackishviolet<br />
lower surface. Lobes become elongated in shady habitats, and develop<br />
long, black marginal rhizines.<br />
Locations Knuckles mountains, Matale, Nuwara Eliya, Kandy, Hakgala,<br />
Sabaragamuwa mountain region, Peak wilderness, Laxapana and Seven Virgin<br />
Mountains and roadside banks on the Haputale- Bandarawela Road.<br />
Description Foliose. The thallus is corticolous. The lobes are slightly disjunct<br />
or adjacent, more or less plane, and do not ascend, have short lateral lobes. The<br />
upper surface is greyish green. The lower surface is white. Isidia and soredia are<br />
absent. Apothecia are laminal, sessile to substipitate (short-stalked).<br />
Status Spotted in a few localities, but fairly uncommon. This species is easily<br />
identified by the greyish apothecia which look like a bunch <strong>of</strong> flowers and the<br />
black rhizine mat.<br />
Habitat Found growing especially on twigs and branches, in both moist and<br />
open, sunny places. Mostly found at forest margins.<br />
Locations Deenston, Corbet’s Gap, Riverston and Knuckles mountain <strong>of</strong> Knuckles<br />
mountain region and few places in Nuwara Eliya<br />
Physciaceae<br />
88 <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> 89
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