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Document Type

Research

Abstract

The Birch family as now understood, comprises six genera and about seventy-five species, mostly natives of the northern hemisphere. Some authors include this family with the Oak or Beech family under the name of Cupuliferae. The chief distinction is the arrangement of the pistillate flowers. The Birch family has the pistillate flowers in aments while the Oak family has the pistillate flowers subtended by an involucre which becomes a bur or cup in fruit.

Publication Date

1900

Journal Title

Proceedings of the Iowa Academy of Sciences

Volume

8

Issue

1

First Page

169

Last Page

177

Copyright

©1900 Iowa Academy of Science, Inc.

Language

en

File Format

application/pdf

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