British Basidiomycetae: A Handbook to the Larger British Fungi (Classic Reprint) - Couverture souple

Rea, Carleton

Couverture souple

ISBN 10 : 1334005249 ISBN 13 : 9781334005244

Editeur : Forgotten Books, 2018

Synopsis

The digital edition of all books may be viewed on our website before purchase. Excerpt from British Basidiomycetae



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A propos du livre

Présentation de l'éditeur

In the larger fungi these spores are borne either to the exterior of a cell called the basidium or are contained within a sac-like cell called the ascus. Fungi with basidia constitute the BASIDIOMYCETAE, whilst those with asci are known as the ASCOMYCETAE. The present work deals only with the former group. The Basidiomycetae were, until quite recently, divided into two main groups, HYMENOMYCETAE and GASTEROMYCETAE :in the former the spores are freely exposed to the air at maturity, whilst in the latter they remain inclosed within the body of the fungus. The spores on germination either give rise to threads or hyphae (collectively known as the mycelium or spawn) or they produce secondary spores termed sporidiola which on germination develop the mycelium. This mycelium constitutes the vegetative portion of the fungus and consists of septate hyphae, in some cases with lateral outgrowths known as clamp connections which arise near the septa and connect two adjacent cells. The mycelium is either filamentous or forms cord-like strands. At their extremities the hyphae give rise to other hyphae which terminate in basidia, sterile paraphyses which act as spacing elements and in some cases other sterile cells termed cystidia. These elements together constitute the hymenium and generally form a homogeneous layer but in some of the Gasteromycetae the basidia are irregularly distributed as in Scleroderma. The tissue between the hymenial layers is known as the trama. The basidium may consist either of a continuous cell, or be longitudinally divided, or transversely septate. It is usually surmounted at the apex by short stalks, the sterigmata, which bear the spores; sometimes these are lateral or arise from the division of the transversely septate basidia: sometimes the spores are borne directly on the hyphae. In some genera long vesicular hyphae are present which traverse
(Typographical errors above are due to OCR software and don't occur in the book.)

Détails de l'édition

• Éditeur: Forgotten Books
• Date d'édition: 2018
• Langue: anglais
• ISBN 10: 1334005249
• ISBN 13: 9781334005244
• Reliure: Broché
• Nombre de pages: 820
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