PDF - CES (IISc)

Thallus with Gloeocapsa gonidia.
Thallus crustaceous.
FAMILIES AND GENERA 333
Spores simple i. Pyrenopsis Nyl.
Spores i-septate 2. -Cryptothele Forss.
Thallus shortly fruticose
3. Synalissa Fr.
Thallus lobate, centrally attached 4. *Phylliscidium Forss.
Thallus with Chroococcus gonidia.
Thallus crustaceous 5. Pyrenopsidium Forss.
Thallus lobate, centrally attached 6. *Phylliscum Nyl.
Thallus with Xanthocapsa gonidia.
Thallus crustaceous.
Thallus non-corticate.
Spores simple.
Apothecia open, asci 8-spored 7. Psorotichia Forss.
Apothecia covered, asci many-spored 8. *Gonohymenia Stein.
Spores i -septate.
Apothecia closed 9. *Collemopsidium Nyl.
Thallus with plectenchymatous cortex 10. *Forssellia A. Zahlbr.
Thallus lobate, centrally attached.
Spores simple.
Thallus plectenchymatous throughout
u. *Anema Nyl.
Thalline tissue of loose hyphae
12. *Thyrea Massal.
Cortex of upright parallel hyphae 13. *Jenmania Wacht.
Spores i -septate.
Thalline tissue of loose hyphae 14. *Paulia Fe"e.
Thallus fruticose.
Thallus without a cortex 15. *Peccania Forss.
Thallus with cortex of parallel hyphae
XXXVIII. LlCHlNACEAE
16. *Phloeopeccania Stein.
The only family of lichens associated with Rivularia gonidia, the
trichomes of which retain their filamentous form to some extent in the
more highly developed genera; they lie parallel to the long axis of the
squamule or of the frond except in LicJiinella in which genus they are
vertical to the surface. The thallus may be crustaceous, or minutely foliose,
or fruticose; in all cases it is dark-brown in colour, and the gelatinous
character is evident in the moist condition. The best known British genus
is Licliina which grows on rocks by the sea.
The apothecia are more or less immersed in the tissue; in Pterygium and
Steinera they are open and superficial (the latter monotypic genus confined
to Kerguelen). They are also open in Lichinella and Homopsella^ both very
rare genera. The spores are colourless and simple except in Pterygium arid
Steinera where they are elongate, and i-3-septate.
Thallus crustaceous squamulose.
Apothecia immersed in thalline warts i. *Calothricopsis Wain.
Apothecia superficial, with thalline margin 2. *Steinera A. Zahlbr.
Apothecia superficial, without a thalline margin 3. Pterygium Nyl.