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The Reproductive Biology of Agavaceae: I. Pollen and Nectar Production in Four Arizona Agaves
William M. Schaffer and M. Valentine Schaffer
The Southwestern Naturalist
Vol. 22, No. 2 (Jun. 3, 1977), pp. 157-167
Published by: Southwestern Association of Naturalists
Stable URL: http://www.jstor.org/stable/3669806
Page Count: 11
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The rates and timing of nectar and pollen production in four species of agaves were studied. Two species (Agave palmeri and A. schottii) were found to be primarily nocturnal producers and additionally were shown to secrete relatively unconcentrated nectars. The remaining species (A. toumeyana and A. parviflora) produce nectar and pollen primarily during the daytime. The adaptive significance of these and related variations is discussed.
The Southwestern Naturalist © 1977 Southwestern Association of Naturalists