Shorea sumatrana van Sl Ex Foxw

[Shorea after Sir John Shore (17511834), Governor General of India (1793-1798); and Latin sumatrana = from Sumatra]

Physical description: It is a timber which grows to a height of 36 m and a girth of 2.5 m in the rainforest of Malaysia and Indonesia. The stem is smooth and glabrous, except for the young ones which are covered with a few stellate hairs. Leaves: simple, alternate and stipulate. The stipules are 4 mm x 2 mm, triangular, caducous and velvety, and the petiole is slightly channeled, glabrous, 1cm-1.6cm long, cracked transver-sally near the blade. The blade is hard, oblong-elliptic, leathery, heavy, and glabrous. The base is round and the apex acute. The margin is slightly wavy and recurved. The midrib and secondary nerves are sunken above the blade and raised beneath. The midrib is slightly channeled below and there are 9-10 pairs of secondary nerves. The tertiary nerves are hardly visible. The inflorescences consist of terminal or axillary panicles of 8 cm-10 cm long, covered with a few stellate hairs. Flower: the calyx is very small, velvety and comprises of 5 sepals of unequal size (1 mm-3mm long). The corolla comprises of 5 petals which are reddish-yellow, linear,

Sym.

Synonymy: Isoptera borneensis King non R. Scheffer ex Burck, Isoptera sumatrana v. Slooten ex Thorenaar.

Common names: Sengkawang ayer (Malay).

Common names: Sengkawang ayer (Malay).

Fig. 89. Shorea sumatrana (van. Sl. Ex Foxw) Sym. From: KLU Herbarium 65301. Field collector: x. m. x., 17 Sep 1955. Geographical localization: Slong, Ulu Kelantan, near a stream, altitude 100 feet, Northeast Malaysia. Botanical identification: 14 Oct 1955, x.m.x. From KLU Herbarium 001517. Field collector: Mohd. Kasim Bin Rajab. Geographical localization: Kepong, F.R.I., Selangor. Roadside in front of nursery, 12 Jun 1963, West Malaysia. Botanical identification: Mohd. Kasim Bin Rajab & Ashton, 12 Feb 1973.

Fig. 89. Shorea sumatrana (van. Sl. Ex Foxw) Sym. From: KLU Herbarium 65301. Field collector: x. m. x., 17 Sep 1955. Geographical localization: Slong, Ulu Kelantan, near a stream, altitude 100 feet, Northeast Malaysia. Botanical identification: 14 Oct 1955, x.m.x. From KLU Herbarium 001517. Field collector: Mohd. Kasim Bin Rajab. Geographical localization: Kepong, F.R.I., Selangor. Roadside in front of nursery, 12 Jun 1963, West Malaysia. Botanical identification: Mohd. Kasim Bin Rajab & Ashton, 12 Feb 1973.

1.4 cm x 5 mm-1 mm, hairy below and contorted in buds. The fruits are glaucous, velvety and slightly acuminate 1.4cm x 1.1cm nuts surrounded by 5 round, woody, irregularly shaped, 5 mm-1 cm x 1 cm-7 mm persistent sepals (Fig. 89).

Pharmaceutical potential: To date, the pharmacological potential of Shorea sumatrana (van. Sl. Ex Foxw) Sym. is still unknown and it will be interesting to learn whether more intensive future research of this plant will disclose any molecules of chemotherapeutic interest.

Warning: Caution must be taken as the toxic effects of this plant are unknown.

Continue reading here: Family Theaceae Ddon 1825 nom conserv the Tea Family

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