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Le Thalle, Les Apothecies Et Les Asques Du Peltigera Rufescens (Weis)Humb. (Discolichen, Peltigeracee)

Published online by Cambridge University Press:  28 March 2007

Marie-Agnes Letroutt-Galinou  and
R. Lallemant
Marie-Agnes Letroutt-Galinou
Affiliation:
Laboratoire de Botanique annexe, Faculty des Sciences, 1 rue Victor Cousin, Paris 5éme, France.
R. Lallemant
Affiliation:
partie d'un D.E.S. Paris 1969.
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Summary

The thallus of Peltigera rufescens has a cladomian structure. It is developed from axial filaments which are lodged in the veins and from which are developed several, short, ventral pleuridia and numerous well-developed, which are developed, dorsal ramifications.

The latter form the remainder of the thallus.

The ascocarps develop directly from a small number of marginal, dorsal pleuridia which form a well-delimited primordium from which is built up a primary corpus, similar to the type formed in graphidian and lecanorian species. To this is added a parathecial apparatus. Although this development is to be qualified lecanorian, certain peculiarities may be noted; these are a very long angiocarpic stadium in the course of which are built up a parathecioid envelope and a marginal crown, the characters of which are intermediate between those of primary and secondary elements.

The asci are bitunicate and ‘archaeascé’.

Type
Research Article
Information
The Lichenologist , Volume 5 , Issue 1-2 , October 1971 , pp. 59 - 88
Copyright
Copyright © British Lichen Society 1971

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