Dissochaeta glabra Merr. var. kinabaluensis (Veldkamp) Karton., 2018

Kartonegoro, Abdulrokhman, Veldkamp, Jan Frits, Hovenkamp, Peter & Welzen, Peter van, 2018, A revision of Dissochaeta (Melastomataceae, Dissochaeteae), PhytoKeys 107, pp. 1-178 : 1

20.2. Dissochaeta glabra Merr. var. kinabaluensis (Veldkamp) Karton. comb. nov. Fig. 15 , Map 14

Diplectria glabra (Merr.) M.P.Nayar var. kinabaluensis (Veldkamp) J.F.Maxwell, Gard. Bull. Singapore 33: 313. 1980.

Basionym.

Diplectria glabra (Merr.) M.P.Nayar ssp. kinabaluensis Veldkamp, Blumea 24: 422, fig. 1A, 4C. 1978.

Type.

Malaysia. Sabah: Sosopodon, near Kundasang, 4500 ft. elev., 15 Jul 1964, G. Mikil SAN 46742 (holotype: L [L0008869]!; isotypes: K [K000859551]!, L [L0008870]!, SAN n.v.).

Description.

Hypanthium 5-6 × ca. 3.5 mm, glabrous, reddish; petal bud conical, 4-5 mm long; mature petals suborbicular, 5-6 × ca. 4.5 mm, not reflexed, violet or pink, base clawed, apex acute. Stamens 8, unequal, filaments straight; alternipetalous stamens staminodial, with ca. 5 mm long filaments, thecae 1-2 mm long, basal crest triangular, ca. 2 mm long, thin, apex acute, base emarginate or hastate, lateral appendages prolonged from the locule vestige, paired, filiform, 5-6 mm long; oppositipetalous stamens with ca. 6 mm long filaments, thecae 5-6 mm long, yellow, basal crest bifid, ca. 2 mm long, lateral appendages ligular with bifid apex, ca. 1 mm long. Ovary half as long as hypanthium, apex glabrous; style glabrous, 11-12 mm long, curved at the end, slender; stigma minute, capitate; extra-ovarial chambers 8, extending to ⅓ of the ovary. Fruits urceolate, 6-7 × ca. 5 mm, glabrous.

Distribution.

Borneo (Sabah).

Ecology and habitat.

Montane forest at 1300-1500 m elevation.

Note.

This variety differs from var. glabra in having larger inflorescences, flowers and fruits. The fruits of var. kinabaluensis are rather urceolate instead of subglobose. The distribution of the variety is restricted to the montane forest of the Mount Kinabalu Complex and Crocker Range in Sabah, Borneo.

Specimens examined.

MALAYSIA. Sabah: Ranau, Mt. Kinabalu, Ulu Liwagu-Ulu Mesilau, 1220 m, 2 Sep 1961, W.L. Chew, A.J.G.H. Corner & A. Stainton RSNB 2647 (K, L); Ibid., Tenompok, 1500 m, 29 Apr 1932, J. Clemens & M.S. Clemens 29442 (BM, K, L, NY); Ibid., Penibukan, 1500 m, 10 Jan 1933, J. Clemens & M.S. Clemens 30865 (BM, K, L); Ibid., 7 Feb 1933, J. Clemens & M.S. Clemens 31520 (BM); Ibid., 2000 m, 26 Oct 1933, J. Clemens & M.S. Clemens 40940 (BM, K, L); Ibid., 1670 m, 13 Nov 1933, J. Clemens & M.S. Clemens 50337 (BM, K); Ibid., Gurulau, 1500 m, 25 Nov 1933, J. Clemens & M.S. Clemens 50476 (BM, K, L); Ibid., 29 Nov 1933, J. Clemens & M.S. Clemens 50555A (BM); Ibid., Sosopodon, Kundasang, 1370 m, 15.Jul 1964, G. Mikil SAN 46742 (K, L); Tambunan, Mount Alab, 1500 m, 2 Mar 1995, J.T. Pereira et al. 111 (L).

Figures

Map 14. Distribution of D. glabra var. kinabaluensis (▲).

Figure 15. Dissochaeta glabra var. kinabaluensis. a habit b branchlet c hypanthium d flower. Photographs by D. Penneys; voucher: Penneys 2542 (WNC).