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The evaluation of characters in lichenized families, exemplified with the alectorioid and some parmelioid genera

In English

Författare

Summary, in English

Important characters in the classification of the lichenized familyAlectoriaceae (Lecanorales) are discussed and evaluated. A few associated genera presently accommodated in the familyParmeliaceae (Lecanorales) are also discussed. Characters in the asci and hamathecium are of major importance, but structural characters such as general thallus organization and anatomy of cortical layers must also be considered. Secondary chemical products, however, were not found to be decisive for the circumscription of this family. Only three genera, Alectoria, Oropogon, and Sulcaria, can be included, based mainly on the structure of the large, strongly amyloid asci; the rather large and darkly pigmented, thick-walled spores, usually few per ascus; and the structure of the anastomosing paraphysoids. Arguments are also given as to why the other alectorioid genera, i.e. Bryocaulon, Bryoria and Pseudephebe must be excluded from this family. Similarly developed ascus and hamathecial structures are also discussed in a few unrelated parmelioid genera: Cetrelia, Menegazzia, Parmelaria, and Parmelia.

Publiceringsår

1992

Språk

Engelska

Sidor

181-204

Publikation/Tidskrift/Serie

Plant Systematics and Evolution

Volym

180

Issue

3-4

Dokumenttyp

Artikel i tidskrift

Förlag

Springer

Ämne

  • Botany

Nyckelord

  • Ascomycotina
  • Lecanorales
  • Alectoriaceae
  • Parmeliaceae
  • asci
  • ascospores
  • hamathecium
  • anatomy

Status

Published

ISBN/ISSN/Övrigt

  • ISSN: 1615-6110