Aspen Bibliography

Sex Ratio and Hermaphroditism in a Natural Population of Quaking Aspen [Populus tremuloides]

Document Type

Article

Journal/Book Title/Conference

Minnesota Forestry Notes

Issue

55

Publication Date

1957

Abstract

The flowers of quaking aspen (Populus tremuloides Michaux) are borne in a characteristic scaly spike called an ament or catkin. Most references works consider the flowers to be typically imperfect (unisexual) and the species dioecious, i.e., with the pistillate and staminate flowers segregated such that individual trees are wholly female or male. Exceptions to this "normal" condition, particularly the occurrence of perfect (hermaphroditic or bisexual) flowers, have been observed on individual trees and reported from time to time. No systematic attempt to determine the frequency of sex abnormality in wild populations of quaking 'aspen was made until Santamour (3) reported a sex analysis of 67 seedling-origin trees native in north central Massachusetts.

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