The chromosome numbers of eight species of the Orchidaceae were reported last year. The purpose of this paper is to report seven more species. The material was collected in Minnesota and Massachusetts. The following numbers were found: Cypripedium hirsutum, 2n = 20; Habenaria blephariglottis, 2n = 42; H. clavellata, 2n = 42; H. dilatata, 2n = 42; H. Hookeri, 2n = 42; H. hyperborea, 2n = 42; and H. obtusata, 2n = 42. The size relationships are the same as in the species studied last year. The Cypripedium has very large chromosomes, and the Habenarias relatively very small ones.
Proceedings of the Iowa Academy of Science
©1933 Iowa Academy of Science, Inc.
Humphrey, L. M.
"The Somatic Chromosomes of Cypripedium hirsutum and Six Species of Habenaria,"
Proceedings of the Iowa Academy of Science, 40(1), 75-75.
Available at: https://scholarworks.uni.edu/pias/vol40/iss1/12