This name is not current. Find out more information on related names.

Avicenniaceae Miq.
Pl.Preiss. 1:353 (1845)

Name Status: Not Current

Scientific Description
Leslie Watson, Thursday 8 September 2016

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.