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The Reproductive Biology of Cyrtandra grandiflora (Gesneriaceae) on Oahu

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Title: The Reproductive Biology of Cyrtandra grandiflora (Gesneriaceae) on Oahu
Authors: Roelofs, Faith M.
Issue Date: Jul 1979
Publisher: University of Hawaii Press
Citation: Roelofs FM. 1979. The reproductive biology of Cyrtandra grandiflora (Gesneriaceae) on Oahu. Pac Sci 33(3): 223-231.
Abstract: In Cyrtandra grandiflora flowering is correlated with a relatively
dry period or with the associated increased sunlight that occurs about 3
months prior to flowering. Fruits are mature about 5 months after flowering.
Cyrtandra grandiflora is self-compatible and requires pollination for seed set.
Anthesis takes 7 days and exhibits marked protandry. The pollen is viable for
the entire 7 days; however, the gynoecia are receptive from the opening of the
stigma lobes on the fourth day until senescence. This overlap of sexual
maturity in the last 3 days of anthesis allows for animal-mediated autogamy.
No pollinator was observed, but a crawling, precinctive pollinator is suggested
which results in inbreeding, selfing, or the stimulus for agamospermy. Seed set
is prolific, with high germination rates, but seedlings are small and slowgrowing
and mortality is high in the field. Cyrtandra grandiflora studied here is
shown to have a stable, reproducing population.
ISSN: 0030-8870
Appears in Collections:Pacific Science Volume 33, Number 3, 1979

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