Horsfieldia polyspherula var. sumatrana
Content
Description
Leaves 13-28 by 4.5-9 cm, lateral nerves 11—15(—20) pairs.
Fruits (2.5-)2.8-3.5 by 2.2-2.7 cm, pericarp 3-5 mm thick.
Distribution
Asia-Tropical: Borneo present; Malaya (Peninsular Malaysia present, Singapore present); Sumatera (Sumatera present)
Malesia: Sumatra, Peninsular Malaysia, Singapore, Borneo.
Notes
2 Specimens with fruits less than 30 mm long, smallish leaves, and rather slender twigs may be difficult to distinguish from var. polyspherula.
1 The hairs of the leaf buds in specimens from Sumatra (including the type of var. sumatrana) are quite short, 0.1 mm long; in specimens from Peninsular Malaysia and Borneo they are usually longer and rough, 0.4 mm long.
4 King's collector (Goping) 6004 (syntype of H. majuscula, not the lectotype) and Nur 34117 (both from Peninsular Malaysia, with male flowers) belong to the H. polyspherula-complex on account of the subglobose male buds and details of the androecium. They agree with var. sumatrana, but differ by the larger buds, 1.8-2 mm diameter, with larger androecium, 1 by 0.8 mm; there are 10 or 12 thecae.
3 Specimens from East Kalimantan may deviate in habit by thinner, membranous leaves, which dry to a paler brownish colour; the flowers and fruits are not different, although Kostermans (12613) noted that the fruit is wine-red, a colour as yet unrecorded for other fruiting collections.