Alstonia angustifolia
Content
Description
Tree 5-35(-46) m high, 8-70 cm dbh, fluted at base, or with small or steep buttresses.
Bark smooth, shallowly fissured, or scaly in horizontal and longitudinal fissures, sometimes with large scattered protruding lenticels, grey or brownish;
Branchlets glabrous or puberulent.
Leaves in whorls of 3 (rarely 4);
Inflorescence 3-9 cm long, many-flowered;
Flowers fragrant.
Sepals pale green, connate at the base for 0.8-1.5 mm, obovate, 1.3-2 by 0.7-1.2 mm, acute, obtuse or rounded, reflexed or not, rusty pubescent outside and at the lobed parts inside.
Stamens inserted at 2-2.8 mm from the base;
Fruit a pair of follicles, 20-53 cm by 1.7-2.6(-3) mm, glabrous.
Seeds densely pubescent, elliptic to oblong, (4-)6-8.6 by 1.2-1.8(-2) mm, one end acuminate up to 4 mm long, the other end rounded;
Distribution
Asia-Tropical: Borneo present; Malaya (Peninsular Malaysia present, Singapore present); Sumatera (Sumatera present), Bangka Island present
Malesia: Sumatra (including Bangka Island), Peninsular Malaysia, Singapore, Borneo.
Uses
The hard wood can be used for construction work but the trees are usually not large enough for heavy construction.
Citation
Merr. 1921: Bibliogr. Enum. Born. Pl.: 497
Ridl. 1923 – In: Fl. Malay Penins.: 348
P.S. Ashton 1988 – In: Man. non-Dipt. Trees Sarawak: 20
Monach. 1949 – In: Pacific Sci.: 160
Whitmore 1973 – In: Tree Fl. Malaya: 9
Whitmore et al. 1990: Checklist Kalimantan: 24
Coode et al. 1996: Checklist Pl. Brunei: 24
Masam. 1942: Enum. Phan. Born.: 618
I.M. Turner 1997 – In: Gard. Bull. Singapore 47: 123
Whitmore & Tantra 1986: Checklist Sumatra: 18
D.J. Middleton 2004 – In: Tree Fl. Sabah & Sarawak: 15
Corner 1952 – In: Wayside Trees Malaya, ed. 2: 142
F.G. Browne 1955: Forest Trees Sarawak & Brunei: 65
A.DC. 1993 – In: PROSEA: 87
Corner 1952 – In: Wayside Trees Malaya, ed. 2: 141
A.DC. 2001 – In: PROSEA: 65
Smythies 1965: Common Sarawak Trees: 18
King & Gamble 1907 – In: J. Asiat. Soc. Bengal: 440
Whitmore & Tantra 1989: Checklist Sulawesi: 14
Kessler & Sidiy. 1994: Trees Balikpapan-Samarinda: 51
Masam. 1942: Enum. Phan. Born.: 617
Merr. 1921: Bibliogr. Enum. Born. Pl.: 500
Markgr. 1974 – In: Blumea: 26
Burkill 1935 – In: Dict. Econ. Prod. Malay Penins.: 112
Miq. 1857 – In: Fl. Ned. Ind.: 437
Sidiy. 1998 – In: Blumea: 101
J.A.R. Anderson 1980: Checklist Trees Sarawak: 147
I.M. Turner 1993 – In: Gard. Bull. Singapore 45: 34