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Bruguiera gymnorhiza (L.) Savigny

Bruguiera gymnorhiza (L.) Savigny

Family

Rhizophoraceae

Synonyms

Bruguiera conjugata Merr.

Vernacular Names

Malaysia Bakau besar, tumu merah (Peninsular), berus kurong (Sarawak), putut (Sabah).
English Black mangrove, Burma mangrove.
Indonesia Putut (Sumatra), tanjang (Java).
Thailand Kong-kang hua sum, prasak (Central).
Singapore Tumu merah.
Papua New Guinea

Mangoro (Pidgin).

Philippines Busaing (General).
Myanmar Byu-u-talon.
Cambodia

Kong kang, prâsâk' nhii, prâsâk' tôôch.

Vietnam V[ej]t d[uf].

Geographical Distributions

Bruguiera gymnorhiza is distributed from tropical East Africa and Madagascar, through South and Southeast Asia, to north-eastern Australia, Micronesia and Polynesia.

Description

Bruguiera gymnorhiza is a small to fairly large tree that can reach up to 40 m tall. The bole measures up to 70(-90) cm in diametre, buttresses are present, with kneed pneumatophores and sometimes with stilt roots. The surface of the bark is fissured to smooth, distinctly or obscurely lenticellate and greyish to blackish or brown. The inner bark is usually pinkish and often fibrous.

The leaves are decussate, simple, leathery, entire, usually pointed at the apex, black dotted below and with petiole. The stipules are present. The flowers are 8-16-merous, either solitary or large, or clustered in up to 6-flowered cymes, small and bisexual. The sepal is lobed while the petals are 2-lobed and with appendages. The stamens are twice as many as the petals and are enclosed in pairs by the pouched petals. The inferior ovary is 2-4-locular with 2 ovules in each cell and the style is obscurely (2-)3(-4)-lobed.

The fruit is a berry, included in and adnate to the sepal tube. It is with persistent sepal lobes, 1(-2)-seeded and viviparous. Seedling is with cotyledons united at the base. The hypocotyl is cigar-shaped, cylindrical or obscurely ribbed, blunt and falls with the fruit.

Ecology / Cultivation

Bruguiera is a characteristic element of the middle and inner mangrove community, extending into the transitional landward communities, and often in ascending tidal parts of rivers. Its salinity tolerance is 1-3%. Annual rainfall should be over 1000 mm. Bruguiera gymnorhiza trees are often the largest and oldest ones of the mangrove, and their presence marks the final stage of the succession of mangrove towards swamp or dryland rain forest.

Line Drawing / Photograph

Bruguiera_gymnorhiza

References

  1. Plant Resources of South-East Asia No.5(3): Timber trees: Lesser-known timbers.

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