Each spring since 1915 a record has been kept of the date of appearance of the first fully opened flowers of our seed bearing plants found in Henry County. The spring of 1944 completed the thirtieth year of this record. The record is the result of a Spring Flower Contest among the students of the botany classes at Iowa Wesleyan College. The competition is usually keen, (Jaques, 1931), so although we are not insured that the very first plant in bloom was recorded, we do have one of the earliest. These plants are not considered in bloom until pollen is found on the anthers. The plants included in this thirty year record are both the native and cultivated plants that live out of doors throughout the winter, or are raised from seed in open ground out of doors. Errors in identification are cut to the minimum since all flowers listed have been brought into the laboratory where their identification by the student may be checked again by an instructor. The largest list of flowers reported up to May 28 was in 1934 when 517 different plants were listed. The average year runs around 350 species.
Proceedings of the Iowa Academy of Science
©1945 Iowa Academy of Science, Inc.
Jaques, H. E. and Hilleary, Doris
"A Thirty Year's Phenological Record of the Spring Flowering Plants of Henry County,"
Proceedings of the Iowa Academy of Science, 52(1), 149-152.
Available at: https://scholarworks.uni.edu/pias/vol52/iss1/18