Avicenniaceae Miq. → Browse taxa…
This name is not current. Find out more information on related names.
Family Sometimes included in Verbenaceae.
Habit and leaf form. Small mangrove trees and shrubs. Helophytic. Leaves opposite; decussate; leathery; simple. Leaf blades entire. Leaves without stipules. Stem anatomy. Secondary thickening anomalous; via concentric cambia. Roots. Aerial roots present.
Reproductive type, pollination. Fertile flowers hermaphrodite. Unisexual flowers absent. Plants hermaphrodite. Plants viviparous.
Inflorescence and flower features. Flowers aggregated in ‘inflorescences’; in cymes, in panicles, and in umbels. The terminal inflorescence unit cymose. Inflorescences terminal and axillary; cymose or thyrsiform, condensed or spiciform. Flowers bracteate; small; regular; cyclic; tetracyclic. Perianth with distinct calyx and corolla; 9; 2 -whorled; anisomerous. Calyx 5; 1 -whorled; gamosepalous; imbricate. Degree of gamosepaly, maximum length joined/total calyx length about 0.5. Calyx somewhat unequal but not bilabiate. Corolla 4; 1 -whorled; gamopetalous; imbricate; regular; yellow. Androecium 4. Androecial members adnate (in the throat of the corolla); all equal to markedly unequal; free of one another; 1 -whorled. Androecium exclusively of fertile stamens. Stamens 4. Staminal insertion in the throat of the corolla tube. Stamens slightly didynamous, or not didynamous, not tetradynamous; isomerous with the perianth; all alternating with the corolla members. Anthers tetrasporangiate. Gynoecium 2 carpelled. The pistil imperfectly 4 celled, or 2 celled. Carpels reduced in number relative to the perianth. Gynoecium syncarpous; synstylovarious; superior. Ovary plurilocular; 2 locular. Locules partially secondarily divided by ‘false septa’. Styles 1. Ovules 1 per locule; orthotropous to hemianatropous (the curvature arrested early, the ovule remaining almost orthotropous).
Fruit and seed features. Fruit non-fleshy; dehiscent; a capsule. Capsules valvular (bivalved). Cotyledons 2.
Physiology, biochemistry. Photosynthetic pathway: C3.
Special features. Mangroves. Corolla tube straight.
Geography, cytology, number of species. World distribution: tropical coasts. 11 species.
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Western Australian Herbarium (1998–). FloraBase—the Western Australian Flora. Department of Biodiversity, Conservation and Attractions. https://florabase.dpaw.wa.gov.au/