Alstonia angustiloba

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Description

Tree up to 40 m high, up to 60(-100) cm dbh, fluted at base and forming tall buttresses up to 8 m high. Bark rough, fissured and peeling off in rectangular flakes, greyish or brownish; Branchlets glabrous. Leaves in whorls of 4-7(-9); Inflorescence 3-9(-14) cm long, usually forming 2 umbels above each other, many-flowered; Flowers fragrant. Sepals pale green, connate at the base for 0.2-0.6 mm, erect or slightly spreading when dried, ovate, 1.2-2 by 0.7-1 mm, obtuse, sometimes acute, pubescent outside, glabrous or puberulous around the apex inside, ciliate. Stamens inserted at 4.2-5.8 mm from the base; Fruit a pair of follicles, (15-)20-35 cm by 1.6-2.3 mm, brownish tomentose. Seeds dark brown, oblong, 5-7 by 1.3-1.5 mm, minutely undulate and pubescent on the hilar side (except surrounding the hilum which is a glabrous elliptic belt), smooth and glabrous on the other side, ends rounded or obtuse, longest cilia 10-15 mm long.

Distribution

Asia-Tropical: Borneo present; Jawa (Jawa present); Malaya (Peninsular Malaysia present, Singapore present); Sumatera (Sumatera present); Thailand (Thailand present)

Thailand; in Malesia: Sumatra, Peninsular Malaysia, Singapore, Borneo, Java.

Uses

The latex is used in medicine to heal boils and abscesses. The wood is soft but can be used for matches and household items.

Citation

Sidiy. 1998 – In: Blumea: 104

P.S. Ashton 1988 – In: Man. non-Dipt. Trees Sarawak: 22

Kochummen 1997: Tree Fl. Pasoh Forest: 151

Monach. 1949 – In: Pacific Sci.: 152

F.G. Browne 1955: Forest Trees Sarawak & Brunei: 63

Miq. 2001 – In: PROSEA: 65

Burkill 1935 – In: Dict. Econ. Prod. Malay Penins.: 112

Whitmore & Tantra 1986: Checklist Sumatra: 18

Masam. 1942: Enum. Phan. Born.: 617

Miq. 1993 – In: PROSEA: 87

Backer & Bakh.f. 1965 – In: Fl. Java: 226

Ridl. 1923 – In: Fl. Malay Penins.: 347

Coode et al. 1996: Checklist Pl. Brunei: 25

King & Gamble 1907 – In: J. Asiat. Soc. Bengal: 438

Smythies 1965: Common Sarawak Trees: 18

Whitmore et al. 1990: Checklist Kalimantan: 25

I.M. Turner 1993 – In: Gard. Bull. Singapore 45: 34

J.A.R. Anderson 1980: Checklist Trees Sarawak: 148

I.M. Turner 1997 – In: Gard. Bull. Singapore 47: 123

Kessler & Sidiy. 1994: Trees Balikpapan-Samarinda: 52

Merr. 1921: Bibliogr. Enum. Born. Pl.: 497

Markgr. 1974 – In: Blumea: 24

Corner 1952 – In: Wayside Trees Malaya, ed. 2: 142

D.J. Middleton 1999 – In: Fl. Thailand: 42

Cockburn 1976 – In: Trees Sabah: 16

D.J. Middleton 2004 – In: Tree Fl. Sabah & Sarawak: 17