Knema glaucescens
Content
Description
Tree 8-15 m.
Leaves chartaceous or thinly coriaceous, ovate-oblong to lanceolate, 6-20(-23) by 2-6.5(-7.5) cm, apex acute-acuminate, base rounded or subattenuate;
Inflorescences:
Fruits 1 or 2 per infructescence, ellipsoid or broadly obovoid, sometimes ridged, 1.8-2.2 by 1.2-1.8 cm, with mealy hairs 0.1-0.3 mm long;
Distribution
Asia-Tropical: Borneo present (Sabah present, Sarawak present); Malaya (Peninsular Malaysia present, Singapore present); Sumatera (Sumatera present), Bangka present, Benkulu present, Indragiri present, Johore present, Kelantan present, NW & SE Kalimantan present, Palembang present
Malesia: Sumatra (Indragiri, Benkulu, Palembang, Bangka), Peninsular Malaysia (Kelantan, Johore), Singapore, Borneo (Sarawak, Sabah,NW & SE Kalimantan).
Taxonomy
3 As compared to specimens from Sumatra and Peninsular Malaysia, those from Borneo have more broadly obovoid or subglobose fruits (as against ellipsoid), shorter stalked, 3-5 mm (6-11 mm in Sumatra). In general, the leaves of the Borneo specimens are somewhat more coriaceous, and have a slightly coarser venation above.
The specimens S 23624 and 23644 from Sarawak 3rd Div., and S 27203 from 4th Div., have subcoriaceous leaves with a particularly coarse venation on the upper surface, broadly obovoid to subglobose fruits, all fairly deviating from the rest of the material. These specimens may be found to represent a separate taxon, but because matching male flowering material is lacking, they are tentatively included in K. glaucescens. 2 Jack (I.e.) mentions in the original description 12-15 anthers; in the type, Jack s.n. (L), 9-13 anthers were counted. 1 Knema glaucescens keys out together with K. scortechinii and K. communis on account of the subpersistent indumentum on the lower leaf surface; K. scortechinii has a stouter habit, with larger male flowers; K. communis has smaller male flowers, and smaller fruits.
The specimens S 23624 and 23644 from Sarawak 3rd Div., and S 27203 from 4th Div., have subcoriaceous leaves with a particularly coarse venation on the upper surface, broadly obovoid to subglobose fruits, all fairly deviating from the rest of the material. These specimens may be found to represent a separate taxon, but because matching male flowering material is lacking, they are tentatively included in K. glaucescens. 2 Jack (I.e.) mentions in the original description 12-15 anthers; in the type, Jack s.n. (L), 9-13 anthers were counted. 1 Knema glaucescens keys out together with K. scortechinii and K. communis on account of the subpersistent indumentum on the lower leaf surface; K. scortechinii has a stouter habit, with larger male flowers; K. communis has smaller male flowers, and smaller fruits.
Citation
Hook. f. & Thomson 1889 – In: Fl. Brit. India: 111
Warb. 1897: Mon. Myrist.: 616
Gamble 1912 – In: Mat. Fl. Malay Penins.: 247
J.Sinclair 1958 – In: Gard. Bull. Sing.: 302
W.J. de Wilde 1979 – In: Blumea: 462
Jack 2000 – In: Tree Fl. Sabah & Sarawak: 411
RidL 1924 – In: Fl. Malay Penins.: 72