It will not be necessary in this connection to refer to the literature. This may be obtained from such works as Herman 'Mueller and Darcy W. Thompson. In the identification of insects help was obtained from Prof. Osborn and Miss Beach.
Proceedings of the Iowa Academy of Sciences
©1893 Iowa Academy of Science, Inc.
Rolfs, Mary C.
"Notes on the Pollination of Some Liliaceae and a Few Other Plants,"
Proceedings of the Iowa Academy of Science, 1(Pt. 4), 98-100.
Available at: https://scholarworks.uni.edu/pias/vol1/iss4/30