Dyera polyphylla
Content
Description
Tree to 60 m tall, dbh to 200 cm;
Bark chocolate-brown or greyish brown with corky paler lenticels and horizontal ridges;
Branchlets 11-14 mm wide, glabrous.
Leaves in whorls of 6-8;
Inflorescence arranged in whorls, 8.5-14 cm long, glabrous;
Sepals ovate to orbicular, apex rounded or obtuse, 1-1.4 by 1-1.4 mm, 0.9-1.2 times as long as wide, not ciliate, glabrous.
Stamens inserted 0.5−0.6 mm from corolla base which is 0.4-0.43 of tube length;
Ovaries 0.5-0.9 mm long;
Fruit 22−30 by 1.8−4 cm.
Seeds:
Taxonomy
Dyera polyphylla and Alstonia pneumatophora both have pneumatophore roots which can easily be distinguished in the field even when the connection to the parent tree is not obvious by the chocolate-brown bark with corky paler lenticels and horizontal ridges of D, polyphylla and the grey bark with non-corky horizontal lenticels of Alstonia pneumatophora.
Citation
Steenis 2004 – In: Tree Fl. Sabah & Sarawak: 30
P.S. Ashton 1988: Man. non-Dipt. Trees Sarawak: 32
D.J. Middleton 1997 – In: Argent et al., Man. non-Dipterocarp Trees C. Kalimantan 1: 83
Steenis 1995 – In: PROSEA: 230
Masam. 1942: Enum. Phan. Born.: 619
Boerl. 1900 – In: Bull. Inst. Bot. Buitenzorg: 15
Merr. 1921: Bibliogr. Enum. Born. Pl.: 498
Coode et al. 1996: Checklist Pl. Brunei: 26
Cockburn 1976 – In: Trees Sabah: 20
Whitmore & Tantra 1986: Checklist Sumatra: 19
Merr. 1921: Bibliogr. Enum. Born. Pl.: 498
Masam. 1942: Enum. Phan. Born.: 619
J.A.R. Anderson 1980: Checklist Trees Sarawak: 148
Monach. 1946 – In: Lloydia: 194
Smythies 1965: Common Sarawak Trees: 21
F.G. Browne 1955: Forest Trees Sarawak & Brunei: 63
D.J. Middleton 2003 – In: Gard. Bull. Singapore 55: 212
Whitmore et al. 1990: Checklist Kalimantan: 25
J.A.R. Anderson 1972: Tr. Peat Swamp For. Sarawak: 23