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Helwingia Japonica
''Helwingia japonica'', the Japanese helwingia, is a species of ''Helwingia'' native to East Asia. ''Helwingia japonica'' is part of the genus ''Helwingia'' and the family Helwingiaceae. Description Helwingia japonica is a dioecious shrub whose height varies between , and may spread , with leaves of in length. The lateral and midvein are concave, and the leaves' colors are green. Flowers grow from the center of the leaf midribs, taking the shape of a simple umbel inflorescence. In male species, 3–10 small green or purplish- green flowers grow but only 3–5 will open simultaneously. The female plants have 1–3 flowers. Flowering takes place between April to May, and fruiting is from August to September. Reproduction The ''Helwingia japonica'' is a dioecious plant Dioecy (; ; adj. dioecious , ) is a characteristic of a species, meaning that it has distinct individual organisms (unisexual) that produce male or female gametes, either directly (in animals) or indirect ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Helwingia
The genus ''Helwingia'' consists of shrubs or rarely small trees native to eastern Asia, the Himalayas, and northern Indochina. It is the only genus in the family Helwingiaceae. Description The plants have alternate, evergreen or deciduous leaves and small inflorescences that are epiphyllous (growing from the leaf surface). During development, the flowers appear separate from the leaves, but eventually fuse with the leaf midrib. Flowers are small and yellow-green or purple, followed by red or black berries. Plants are dioecious. Epiphyllous inflorescences This trait is rather unusual among plants. This strange floral position upon a leaf is believed to be an adaption to insect pollination. Pollinators, which are too large for the flowers, land on the leaf surfaces and can pollinate the flowers, which would not be able to support the pollinators themselves. Taxonomy The APG II classification (2003) places them in the order Aquifoliales, along with the hollies and Phyllonomaceae, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Helwingiaceae
The genus ''Helwingia'' consists of shrubs or rarely small trees native to eastern Asia, the Himalayas, and northern Indochina. It is the only genus in the family Helwingiaceae. Description The plants have alternate, evergreen or deciduous leaves and small inflorescences that are epiphyllous (growing from the leaf surface). During development, the flowers appear separate from the leaves, but eventually fuse with the leaf midrib. Flowers are small and yellow-green or purple, followed by red or black berries. Plants are dioecious. Epiphyllous inflorescences This trait is rather unusual among plants. This strange floral position upon a leaf is believed to be an adaption to insect pollination. Pollinators, which are too large for the flowers, land on the leaf surfaces and can pollinate the flowers, which would not be able to support the pollinators themselves. Taxonomy The APG II classification (2003) places them in the order Aquifoliales, along with the hollies and Phyllonomaceae, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dioecy (plant)
Plant reproductive morphology is the study of the physical form and structure (the morphology) of those parts of plants directly or indirectly concerned with sexual reproduction. Among all living organisms, flowers, which are the reproductive structures of angiosperms, are the most varied physically and show a correspondingly great diversity in methods of reproduction. Plants that are not flowering plants (green algae, mosses, liverworts, hornworts, ferns and gymnosperms such as conifers) also have complex interplays between morphological adaptation and environmental factors in their sexual reproduction. The breeding system, or how the sperm from one plant fertilizes the ovum of another, depends on the reproductive morphology, and is the single most important determinant of the genetic structure of nonclonal plant populations. Christian Konrad Sprengel (1793) studied the reproduction of flowering plants and for the first time it was understood that the pollination process involve ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
