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The Male Gametophyte of Dacrydium

Mary S. Young
Botanical Gazette
Vol. 44, No. 3 (Sep., 1907), pp. 189-196
Stable URL: http://www.jstor.org/stable/2466255
Page Count: 9
Subjects: Botany & Plant Sciences Biological Sciences Environmental Science
Find more content in these subjects: Botany & Plant Sciences Biological Sciences Environmental Science
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Abstract

1. There are two prothallial cells cut off from the main body of the spore. In Dacrydium Bidwillii usually only the second divides; in D. laxifolium and D. cupressinum both divide. 2. The generative cell divides by an anticlinal wall, one daughter cell functioning as a body cell and the other being sterile. In some cases both produce body cells. 3. The walls of the prothallial cells and the two generative daughter cells disappear. 4. The mature pollen grain contains the body cell and five or six free nuclei, according as the first prothallial cell has or has not divided.

Notes and References

This item contains 7 references.

Literature Cited
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