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Document Type

Research

Abstract

For morphological investigations the selection of material is of primary importance. This is especially significant in the comparative study of leaves since these organs may have marked differences in size and structure on a given branch or on a single twig. During development they are responsive not only to environmental conditions but also to factors operating within the plant. Trees often develop diminutive foliage and insertion of the dwarf leaf on the axis may be very close to others of larger growth. This anisophylly is pronounced in many plagiotropic shoots and may also be associated with basal-apical relations. Such dwarf leaves are common in Cercis Canadensis, especially on secondary branches. This paper takes up the dwarf, palmate leaf of Cercis in comparison with its sun and shade leaves of larger growth. These results are also compared with the findings of Obaton who studied the dwarf, pinnate leaves of several species. (Obaton, F., 1922, Revue Gen. de Bot. Vol. 34). The contrasting expressions in these two types of dwarf leaves are of special interest.

Publication Date

1942

Journal Title

Proceedings of the Iowa Academy of Science

Volume

49

Issue

1

First Page

117

Last Page

122

Copyright

© Copyright 1942 by the Iowa Academy of Science, Inc.

Language

EN

File Format

application/pdf

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