Horsfieldia polyspherula var. sumatrana

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Horsfieldia polyspherula var. sumatrana


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.


Asia-Tropical: Borneo present; Malaya (Peninsular Malaysia present, Singapore present); Sumatera (Sumatera present)
Malesia: Sumatra, Peninsular Malaysia, Singapore, Borneo.


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.


J. Sinclair 1958: 425, 426. – In: Gard. Bull. Sing.: f. 48-50, 51A-D
W.J. de Wilde 2000 – In: Tree Fl. Sabah & Sarawak: 384
Gamble 1912 – In: Mat. Fl. Malay Penins.: 220
Ridl. 1924 – In: Fl. Malay Penins.: 60