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Term Definition
Receptive stigma The time when pollen grains placed on the stigma by a pollinator are able to germinate and, thus, the nuclei they contain can potentially fertilize the egg which then has the chance to grow into an embryo, then become a seedling, and finally a reproductive plant itself. Stamens and stigma of a Bignoniaceae. Photos by S. A. Mori.
Stigma The apex of the style and the place where the pollen is carried to by pollination agents. The pollen grains germinate on the stigma and grow down the style to the ovule where a sperm from a pollen grain fertilizes an egg in an ovule. Punctiform, lepidote stigma of Lecythis retusa. Photo by N. P. Smith
Stigma The part of the gynoecium receptive to pollen usually located at the summit of the style. Complete flower. Drawing by B. Angell.
Stigma convoluted A stigma that appears to coiled or twisted. Convoluted stigma of Allantoma lineata. Photo by C. Carollo.
Stigma lined Lines found on the stigmas of at least some species of and . In this type of stigma shape the lines are clearly separated from other parts of the ovary. Stigma of Gustavia crassifolia sp. ined. Photo by S. A. Mori.
Stigma lobed A stigma divided into separate parts. Summit of an ovary of Grias peruviana. Photo by C. Carollo.
Stigma punctiform A stigma that is neither lobed or displays stigmatic lines. Punctiform, lepidote stigma of Lecythis retusa. Photo by N. P. Smith
Stigma surface lepidote A stigma with minute scales over its surface. Punctiform, lepidote stigma of Lecythis retusa. Photo by N. P. Smith
Stigma surface pubescent A stigma with septate trichomes covering what appears to be the receptive part of the stigma. Summit of an ovary of Couratari stellata. Photo by C. Carollo.