Dyera costulata

Content

Description

Tree to 80 m high, to 300 cm dbh, sometimes with somewhat exposed roots but not with knee-shaped pneumatophores. Bark dark grey, brown or black, smooth with squarish scales; Branchlets 3.5-9 mm wide, glabrous. Leaves in whorls of 4-8; Inflorescence arranged in whorls, 4−18 cm long, glabrous, many-flowered; Sepals ovate or orbicular, 1-3 by 0.8-2 mm, 1-1.5 times as long as wide, apex rounded to acute, ciliate or not, glabrous. Stamens inserted at 0.5-0.6 mm from corolla base which is 0.2-0.36 of tube length; Ovaries 0.3-0.6 mm long; Fruit 18-40 by 2.5-4 cm. Seeds:

Distribution

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

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

Morphology

Specimens of D. costulata from Sumatra more often have a cuneate leaf base than those from other parts of the range, making it more difficult to distinguish herbarium material of the two species from Sumatra.

Citation

I.M. Turner 1997 – In: Gard. Bull. Singapore 47. p 126

Coode et al. 1996: Checklist Pl. Brunei. p 26

Cockburn 1976 – In: Trees Sabah. p 19

Burkill 1935 – In: Dict. Econ. Prod. Malay Penins. p 876

Kessler & Sidiy. 1994: Trees Balikpapan-Samarinda. p 53

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

Merr. 1921: Bibliogr. Enum. Born. Pl. p 498

King & Gamble 1907 – In: J. Asiat. Soc. Bengal. p 443

Ridl. 1923 – In: Fl. Malay Penins. p 345

Smythies 1965: Common Sarawak Trees. p 21

Ridl. 1923 – In: Fl. Malay Penins. p 345

Masam. 1942: Enum. Phan. Born. p 619

D.J. Middleton 2003 – In: Gard. Bull. Singapore 55. p 211

D.J. Middleton 1999 – In: Fl. Thailand. p 36

P.S. Ashton 1988: Man. non-Dipt. Trees Sarawak. p 32

Backer & Bakh.f. 1965 – In: Fl. Java. p 227

D.J. Middleton 1997 – In: Argent et al., Man. non-Dipterocarp Trees C. Kalimantan 1. p 83

Whitmore & Tantra 1989: Checklist Sulawesi. p 14

King & Gamble 1907 – In: J. Asiat. Soc. Bengal. p 444

Monach. 1946 – In: Lloydia. p 190

F.G. Browne 1955: Forest Trees Sarawak & Brunei. p 60

Hook.f. 1995 – In: PROSEA. p 229

Hallier 1913 – In: Bot. Jahrb. Syst. p 372

Whitmore 1973 – In: Tree Fl. Malaya. p 13

King & Gamble 1907 – In: J. Asiat. Soc. Bengal. p 442

Corner 1952 – In: Wayside Trees Malaya, ed. 2. p 144

Hook.f. 2004 – In: Tree Fl. Sabah & Sarawak. p 28

Hook.f. 1882 – In: Fl. Brit. India. p 644

Kerr 1939 – In: Craib, Fl. Siam. 2. p 441

Hook.f. 2000 – In: PROSEA. p 65

Whitmore & Tantra 1986: Checklist Sumatra. p 19

Corner 1988 – In: Wayside Trees Malaya, ed. 3. p 154

Kochummen 1997: Tree Fl. Pasoh Forest. p 151

Whitmore et al. 1990: Checklist Kalimantan. p 25