Journal
PLANT BIOSYSTEMS
Volume 134, Issue 2, Pages 193-197Publisher
EDITRICE COMPOSITORI BOLOGNA
DOI: 10.1080/11263500012331358464
Keywords
breeding system; Helleborus bocconei; Helleborus foetidus; reproductive ecology; seed production; sympatric species
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The results of various types of manual and free pollination are reported in Helleborus bocconei and Helleborus foetidus, two sympatric species of the understorey of submediterranean woods that flower in January-March and are pollinated by bumble-bees of the genus Bombus. species were found to be partially self-compatible even if at different rates; geitonogamy seems to be more frequent in H. foetidus and spontaneous self-pollination does not usually occur for morphological reasons, and the species are not apomictic. Efficiency in seed production alter free pollination was very high indicating that in spite of harsh climatic condition, there were no limitations imposed by pollen or pollinators.
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