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Facultative Autogamy in Synandra hispidula (Labiatae)

Philip D. Cantino
Castanea
Vol. 50, No. 2 (Jun., 1985), pp. 105-111
Published by: Allen Press on behalf of the Southern Appalachian Botanical Society
Stable URL: http://www.jstor.org/stable/4033136
Page Count: 7
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Facultative Autogamy in Synandra hispidula (Labiatae)
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Abstract

The breeding system of an Ohio population of Synandra hispidula was investigated. Flowering individuals were subjected to four pollination regimes: 1) isolation inside insect exclosures without further manipulation; 2) self-pollination by hand in a pollinator-free environment; 3) excision of anthers in a pollinator-free environment; 4) open-pollination (control). Regimes 2 and 4 yielded over 80% seed set and did not differ significantly, regime 1 yielded 46% seed set, and regime 3 resulted in no seed production. Synandra is self-compatible and capable of spontaneous autogamy. The rarity of this monotypic genus is not likely the result of poor pollination.

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