Introduction to Fungi, Third Edition

STRUCTURE AND MORPHOGENESIS OF BASIDIOCARPS
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Fig19.6 Basidiocarp developmentin some Agaricales illustratedby longitudinal sections (after Reijnders,1963). (a) Clitocybeclavipes.
Gymnocarpic development. (b) Lentinus tigrinus. Secondary angiocarpy resulting from extension of hyphae from pileus margin and
stipe to enclose the previously differentiated hymenophore. (c) Stropharia semiglobata. Primary angiocarpy. Note the universal veil
enclosing the upper part of the primordium. In mature fruit bodies this becomes gelatinous.The hymenophore is also enclosed by a
partial veil. (d) Amanitarubescens.Tangential section. Note the break up of the universal veil to form scales on the surface of the
pileus.The gill chamber is enclosed by a partial veil.
or absent, specialized tissues or cells may arise
(see Fig. 19.4). In a study of the fine structure of
the sporophore of Agaricus campestris, Manocha
(1965) has shown that the stipe contains two
kinds of cells wide inflated cells and narrower
thread-like cells. A similar differentiation is
found in Coprinus cinereus (Moore, 1998). When
portions of stipe tissue are placed on suitable