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Article Title

Astraeus and Geastrum

Document Type

Research

Abstract

The genus Astraeus, based on Geastrum hygrometricum Pers., was included in the genus Geaster until Morgan9 pointed out several differences which seemed to justify placing the fungus in a distinct genus. Morgan pointed out first, that the basidium-bearing hyphae fill the cavities of the gleba as in Scleroderma; second, that the threads of the capillitium are long, much-branched, and interwoven, as in Tulostoma; third, that the elemental hyphae of the peridium are scarcely different from the threads of the capillitium and are continuous with them, in this respect, again, agreeing with Tulostoma; fourth, that there is an entire absence of any columella, and, in fact, the existence of a columella is precluded by the nature of the capillitium; fifth, that both threads and spore sizes differ greatly from those of geasters. For these reasons, Morgan stated that it is impossible accurately to define the genus Geaster and still place this fungus in it.

Publication Date

1951

Journal Title

Proceedings of the Iowa Academy of Science

Volume

58

Issue

1

First Page

97

Last Page

99

Copyright

© Copyright 1951 by the Iowa Academy of Science, Inc.

Language

EN

File Format

application/pdf

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