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34 CHAPTER 4 RESULTS 4.1 Lichen diversity Epiphytic lichens ...

34 CHAPTER 4 RESULTS 4.1 Lichen diversity Epiphytic lichens ...

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47<br />

Family LETROUIACEAE<br />

LETROUITAI Haf. & Bellem.<br />

Thallus crustose, pale yellow to greenish-yellow or orange-yellow.<br />

Photobiont green algae. Ascocarps apothecia, sessile, disc yellow-orange to orange<br />

or brownish, margin prominent, pale orange, generally lighter than disc, biatorine.<br />

Hymenium K+ purple or blue-violet. Paraphyses slightly branched and<br />

anastomosing. Aci 2-8-spored. Ascospores colourless, transversely septate, lensshaped<br />

locules.<br />

Letrouitia sp.1<br />

Letrouitia sp.2<br />

Figure <strong>4.1</strong>5 Letrouitia spp., scale bar = 1 mm<br />

Family LOBARICEAE<br />

LOBARIA (Schreber) Hoffm.<br />

Thallus foliose, lobes branched. Upper surface smooth, flat or wrinkled,<br />

scrobiculate. Soredia and isidia present. Photobiont green algae: Myrmecia or<br />

Trebouxia or blue-green algae: Nostoc or Scytonema. Lower surface tomentose,<br />

rhizines present. Ascocarps apothecia laminal on upper surface of thallus. Aci 8-<br />

spored, Peltigera-type. Ascospores colourless or pale brown, 1-7-septate, fusiform to<br />

elongated.

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