Lichens

Name: Lichens
Author: Smith, Annie Lorrain
Smith, Annie Lorrain
Lichens
Paraphyses branched and entangled or wanting.
    Perithecia opening above by stellate
     lobes                                   1. *Asteroporum Müll.-Arg.
    Perithecia opening by a pore.
    Spores variously septate.
      Spore cells cylindrical or cuboid.
      Spores colourless, elongate or
        ovate 1-5-septate                    2.  Arthopyrenia Massal.
      Spores colourless, filiform
        1-multi-septate                      3.  Leptorhaphis Koerb.
      Spores colourless, muriform            4.  Polyblastropsis A. Zahlbr.
      Spores brown, ovoid or elongate
        2-5-septate                          5.  Microthelia Koerb.
      Spore cells globose or lentiform,
        3-multi-septate                      6. *Pseudopyrenula Müll.-Arg.
  Paraphyses unbranched free.
    Spore cells cylindrical or cuboid.
    Perithecia beset with hairs              7.  *Stereochlamys Müll.-Arg.
    Perithecia naked.
      Asci disappearing; spores elongate
          multi-septate, colourless          8. *Belonia Koerb.
      Asci persistent.
        Spores simple, ellipsoid,
          colourless                         9. *Coccotrema Müll.-Arg.
        Spores elongate, 1-multi-septate,
          colourless                        10. Porina Müll.-Arg.
        Spores elongate, 1-multi-septate,
          brown                             11. Blastodesmia Massal.
        Spores muriform, colourless         12. *Clathroporina Müll.-Arg.
        Spores elongate, 2-3-septate,
          colourless                        13. Thelopsis Nyl.
    Spore cells globose or lentiform.
        Spores elongate, 1-5-septate,
          brown                             14. Pyrenula Massal.
        Spores muriform, brown              15. Anthracothecium Massal.


VIII. _PARATHELIACEAE_

This family is peculiar in that the perithecia open by a somewhat
elongate ostiole that slants at an oblique angle. The algal cells are
_Trentepohlia_. Genera and species are endemic in tropical or subtropical
regions of the Western hemisphere, though a species of _Pleurotrema_ has
been found in subantarctic America. They are corticolous and the thallus
is either superficial or embedded. The genera are arranged according to
spore characters:

  Spores elongate, 2- or more-septate.
      Spore cells cylindrical, colourless    1. *Pleurotrema Müll.-Arg.
      Spore cells globose-lentiform.
        Spores colourless                    2. *Plagiotrema Müll.-Arg.
        Spores brown                         3. *Parathelium Müll.-Arg.
  Spores muriform.
        Spores colourless                    4. *Campylothelium Müll.-Arg.
        Spores brown                         5. *Pleurothelium Müll.-Arg.


IX. _TRYPETHELIACEAE_
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Lichens

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