Home > Iowa Academy of Science > Journals & Newsletters > Proceedings of the Iowa Academy of Science > Volume 14 (1907) > Annual Issue
Document Type
Research
Abstract
The study of the variation of the ray flowers of Rudbeckia hirta (cone flower) was taken up during the summer of 1906, at the suggestion of Dr. L. H. Pammel. The object of the study was to determine the amount of variation of the ray flowers, the variation for different localities, and any other facts that could be determined. Later, a study of Rudbeckia triloba and Helianthus grosse-serratus was taken up, with the same end in view, and that the different species might be compared.
Publication Date
1907
Journal Title
Proceedings of the Iowa Academy of Science
Volume
14
Issue
1
First Page
89
Last Page
106
Copyright
©1907 Iowa Academy of Science, Inc.
Language
en
File Format
application/pdf
Recommended Citation
Dudgeon, Winfield
(1907)
"A Study of the Variation of the Number of Ray Flowers of Certain Compositae,"
Proceedings of the Iowa Academy of Science, 14(1), 89-106.
Available at:
https://scholarworks.uni.edu/pias/vol14/iss1/9