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Diplostigmaty
Diplostigmaty refers, in botany, to the presence of extra stigmas along the style. This condition is known from the genus ''Sebaea ''Sebaea'' is a genus of annual plants in the family Gentianaceae. Species occur in Africa, Madagascar, India, China, Thailand, Australia and New Zealand. The genus was paraphyletic and has been split in four genera: ''Exochaenium'', ''Klackenb ...''. It is thought to provide reproductive assurance. References {{Reflist Botany ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sebaea
''Sebaea'' is a genus of annual plants in the family Gentianaceae. Species occur in Africa, Madagascar, India, China, Thailand, Australia and New Zealand. The genus was paraphyletic and has been split in four genera: ''Exochaenium'', ''Klackenbergia'', ''Lagenias'' and ''Sebaea'' ''s.str.''. Synapomorphies for ''Sebaea s.str.'' include the presence of extra stigma along the style (called diplostigmaty) and the shape of the testa cells of the seeds. The name honors Albertus Seba (1665–1736), a Dutch pharmacist, zoologist and collector. Species include (non exhaustiv list): *'' Sebaea albens'' (L. f.) Roem. & Schult. *'' Sebaea albidiflora'' F.Muell. - white sebaea *'' Sebaea ambigua'' Cham. *'' Sebaea amicorum'' I.M. Oliv. & Beyers *''Sebaea aurea'' (L. f.) Roem. & Schult. *'' Sebaea bojeri'' Griseb. *'' Sebaea brachyphylla'' Griseb. *''Sebaea capitata'' Cham. & Schlechtdl. **'' var. capitata'' Cham. & Schlechtdl. **'' var. sclerosepala'' (Schinz) Marais *'' Sebaea chiron ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Botany
Botany, also called plant science (or plant sciences), plant biology or phytology, is the science of plant life and a branch of biology. A botanist, plant scientist or phytologist is a scientist who specialises in this field. The term "botany" comes from the Ancient Greek word (') meaning " pasture", "herbs" " grass", or "fodder"; is in turn derived from (), "to feed" or "to graze". Traditionally, botany has also included the study of fungi and algae by mycologists and phycologists respectively, with the study of these three groups of organisms remaining within the sphere of interest of the International Botanical Congress. Nowadays, botanists (in the strict sense) study approximately 410,000 species of land plants of which some 391,000 species are vascular plants (including approximately 369,000 species of flowering plants), and approximately 20,000 are bryophytes. Botany originated in prehistory as herbalism with the efforts of early humans to identify – a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stigma (botany)
The stigma () is the receptive tip of a carpel, or of several fused carpels, in the gynoecium of a flower. Description The stigma, together with the style and ovary (typically called the stigma-style-ovary system) comprises the pistil, which is part of the gynoecium or female reproductive organ of a plant. The stigma itself forms the distal portion of the style, or stylodia, and is composed of , the cells of which are receptive to pollen. These may be restricted to the apex of the style or, especially in wind pollinated species, cover a wide surface. The stigma receives pollen and it is on the stigma that the pollen grain germinates. Often sticky, the stigma is adapted in various ways to catch and trap pollen with various hairs, flaps, or sculpturings. The pollen may be captured from the air (wind-borne pollen, anemophily), from visiting insects or other animals (biotic pollination), or in rare cases from surrounding water ( hydrophily). Stigma can vary from long and sle ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Style (botany)
The stigma () is the receptive tip of a carpel, or of several fused carpels, in the gynoecium of a flower. Description The stigma, together with the style and ovary (typically called the stigma-style-ovary system) comprises the pistil, which is part of the gynoecium or female reproductive organ of a plant. The stigma itself forms the distal portion of the style, or stylodia, and is composed of , the cells of which are receptive to pollen. These may be restricted to the apex of the style or, especially in wind pollinated species, cover a wide surface. The stigma receives pollen and it is on the stigma that the pollen grain germinates. Often sticky, the stigma is adapted in various ways to catch and trap pollen with various hairs, flaps, or sculpturings. The pollen may be captured from the air (wind-borne pollen, anemophily), from visiting insects or other animals (biotic pollination), or in rare cases from surrounding water ( hydrophily). Stigma can vary from long and slende ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
