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FNA | Family List | FNA Vol. 10 | Combretaceae | Lumnitzera

1. Lumnitzera racemosa Willdenow, Ges. Naturf. Freunde Berlin Neue Schriften. 4: 187. 1803.
[F I]

Black mangrove

Shrubs or trees to 6 m (possibly greater). Leaves: petiole poorly developed, 1–7 mm; blade obovate to elliptic, 1.7–9 × 0.6–3 cm, base attenuate or cuneate, margins revolute when young, surrounding shoot apex, surfaces without scattered salt-excretory glands, glabrous [pubescent]. Spikes 1–3[–7] cm. Flowers: sepals 0.8–1.3 mm; stamens 4–5.5 mm; style 4–7.5 mm. Drupes green or brown, 10–20 × 3–8 mm, glabrous [pubescent]. 2n = 24.

Flowering spring–summer. Tidal swamps, mangrove communities; 0 m; introduced; Fla.; s Asia (Indochina), e Africa to w Pacific Ocean Islands (Fiji, Tonga), n Australia.

In the flora area, Lumnitzera racemosa is known from a single naturalized population in Miami-Dade County.

The open, white flowers of Lumnitzera racemosa are self-compatible and pollinated by bees, butterflies, moths, and wasps. The trees show high fruit set and the fruits, which have a corky outer layer, are water dispersed. The species shows invasive potential; eradication procedures have been attempted, and the cultivated specimens at Fairchild Tropical Botanic Garden have been removed (J. W. Fourqurean et al. 2010).


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