Violaceae
Alternative names: Not Applicable
Description:
Perennial herbs or shrubs; leaves alternate, rarely opposite, simple, mostly stipulate.
Flowers bisexual (sometimes unisexual in Hymenanthera), self-pollination sometimes occurring in the closed bud (cleistogamous), strongly or weakly zygomorphic, solitary or in cymose or racemose inflorescences; sepals 5, imbricate, the lower sometimes pouched at the base; petals 5, imbricate, free, unequal or sometimes almost equal, the lower often longest and more or less spurred; stamens 5, hypogynous, alternate with the petals; filaments short, anthers free or connivent around the ovary, introrse, 2-celled, opening by longitudinal slits, the connective extending beyond the anther into a membranous appendage; ovary superior, 1-celled; placentas usually 3, parietal; ovules 1-several per placenta, anatropous; style simple, stigma terminal.
Fruit a capsule or berry; seeds endospermous, often arillate, embryo straight.
Distribution:
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Mainly tropical to temperate in distribution; 22 genera with approximately 900 species. (This treatment differs in several respects from that of Adams & George (1982) Fl. Aust. 8:91-110.)
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Biology:
No text
Key to Genera:
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1. Flowers only slightly zygomorphic; fruit a berry |
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HYMENANTHERA 2. |
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1. Flowers distinctly zygomorphic; fruit a capsule |
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2. Sepals with basal appendages; herbs with short stems, often stoloniferous; leaves with a distinct often long petiole |
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VIOLA 3. |
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2. Sepals without appendages; herbs or shrubs, stems erect or rarely climbing, without stolons; leaves sessile or nearly so |
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HYBANTHUS 1. |
Author:
Prepared by R. D. Seppelt
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