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Reproductive Biology of the Endangered Plant Clematis socialis (Ranunculaceae)
Margaret Timmerman-Erskine and Robert S. Boyd
The Journal of the Torrey Botanical Society
Vol. 126, No. 2 (Apr. - Jun., 1999), pp. 107-116
Published by: Torrey Botanical Society
Stable URL: http://www.jstor.org/stable/2997286
Page Count: 10
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Information on factors limiting reproduction in rare plants can aid formulation of management practices This study provided basic information about the reproductive biology of Clematis socialis Experiments determined the roles of pollination limitation, herbivory, predation of fruits (achenes), and resource availability in sexual reproduction. Hand pollination increased the frequency of acheneset, indicating that pollination frequency limited reproduction Treating plants with insecticide enhanced production of viable achenes, but resource modification treatments (addition of fertilizer, addition of water, clearing nearby herbaceous plants) did not significantly affect achene production A negative association was found between light levels and flower bud abortion, implying that low light levels increased bud abortion and limited reproductive success. Postmaturation achene predation by mice (Peromyscus sp) was intense Mice destroyed 30% of achenes placed in the field during a 1 wk period We concluded that sexual reproduction in C. socialis was limited by a combination of pollinator abundance, herbivory, low light levels, and post-maturation achene predation
The Journal of the Torrey Botanical Society © 1999 Torrey Botanical Society