In 1915 a record was started in which the date of the first appearance of flowers of our native and cultivated spring plants was kept. A preliminary report was made in 1918. The record now covers ten years and offers ample opportunity for study. Each spring from fifteen to forty students enrolled in some of the botany classes of Iowa Wesleyan College have worked at collecting and making the record. Collecting has been limited to Henry County and most of the specimens are secured within easy reach of Mount Pleasant. Only plants found growing in open ground out of doors have been used. Whenever there has been any doubt as to a flower being in bloom the dissemination of pollen has been made the test.
Proceedings of the Iowa Academy of Science
©1924 Iowa Academy of Science, Inc.
Jaques, H. E.
"A Ten Year's Phenological Record of the Spring Flowering Plants of Henry County,"
Proceedings of the Iowa Academy of Science, 31(1), 225-227.
Available at: https://scholarworks.uni.edu/pias/vol31/iss1/46