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Document Type

Research

Abstract

In studying Vallisneria spiralis abnormal ovules were often noted. The most frequent abnormality is the occurrence of symmetrical double or paired ovules. Upon a common funiculus are borne two nucelli each possessing an inner integument, the whole enclosed by a single outer integument (Figs. 1, 2, 3). Malformations occur rarely and most of them are sterile. In Fig. 7 is shown an ovule having normal integuments with some suggestion of doubling in the nucellus but with plain dominance by the functional or larger part.

Publication Date

1926

Journal Title

Proceedings of the Iowa Academy of Science

Volume

33

Issue

1

First Page

121

Last Page

124

Copyright

© Copyright 1926 by the Iowa Academy of Science, Inc.

Language

en

File Format

application/pdf

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