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Reproductive Biology of Asimina parviflora (Annonaceae)
Eliane M. Norman, Kathleen Rice and Steven Cochran
Bulletin of the Torrey Botanical Club
Vol. 119, No. 1 (Jan. - Mar., 1992), pp. 1-5
Published by: Torrey Botanical Society
Stable URL: http://www.jstor.org/stable/2996913
Page Count: 5
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Flowering and fruiting of the small flowered pawpaw, Asimina parviflora (Michx.) Dunal, was studied in central Florida to determine phenology, pollination, breeding system and germination. This species flowers from mid-February to the end of March. The protogynous flowers occasionally overlap in pistillate and staminate phases. Diptera are the main visitors to the flowers. Bagged flowers occasionally produce fruits (6.8% in 1984). In open-pollinated flowers 3.2% matured fruits in 1984, and 4.5% matured in 1987. Hand cross-pollinations resulted in 16% fruit-set in 1984 and 25% in 1987. Hand self-pollinations resulted in 10.4% fruit-set in 1987. Seed numbers per flower were significantly larger for cross pollinations. Of cross-pollinated seeds, 17.5% germinated; of open-pollinated, 10%; and of self-pollinated, 0%.
Bulletin of the Torrey Botanical Club © 1992 Torrey Botanical Society