Melanochyla angustifolia Hook.f., Fl. Brit.

Melanochyla angustifolia Hook.f., Fl. Brit. View in CoL India 2(4): 39. 1876. Type: MALAYSIA, s.d., A.C. Maingay 492 ( holo K [ K000695567 digital image!]; iso L [ L0015798 digital image!]). Figs. 1 View Fig & 2 View Fig

Trees, evergreen, 12–20 m tall, trunk 35–40 cm in diam., with greenish grey bark, smooth or slightly cracked surface, yielding black resin. Branchlets light brown, pubescent. Leaves simple, petiole 2.5– 4 cm long, thickened towards the base 1–1.5 cm; lamina oblanceolate, elliptic to narrowly elliptic, 23–31 × 6–10 cm, adaxial surface green, abaxial surface white-green, glabrous on both surfaces,with cuneate to attenuate base, margins entire, shortly acuminate to acuminate at apex, secondary veins 12–21 on each side, reticular tertiary veins, distinct below and faint above. Inflorescences terminal panicles, 14–22 cm long, puberulous. Flowers unisexual, subsessile; calyx lobes triangular; petals oblong, elliptic, lanceolate, or oblanceolate, white to yellow, flat. Staminal filaments brown, free; anthers imperfect or abortive stamens present. Disk 5–(or 4-) lobed. Ovary globose; abortive pistils absent in most flowers but present in some, replaced by a tuft of hairs; stigma capitellate. Drupes ellipsoid or ovoid, (2)3–4.5 × 1.5–2 cm, shortly hairy with apex rounded. Seeds dark brown, c. 2 × c. 1 cm.

Flowering & fruiting: Flowering from May to

November; fruiting from April to December. Habitat & ecology: Melanochyla angustifolia was found in mixed evergreen forests with coniferous trees, such as Dacrycarpus imbricatus (Blume) de Laub. , typically near roadside forest edges at elevations between 950 and 1,100 meters above sea level. This species is currently known from a single locality in the Kon Chu Rang Nature Reserve, Gia Lai Province, Vietnam. It grows along the forest margins, in association with Brachytome wallichii Hook.f. ( Rubiaceae ), Callicarpa rubella Lindl. ( Lamiaceae ), Litsea sp. ( Lauraceae ), Desmos cochinchinensis Lour. ( Annonaceae ), and Dacrycarpus imbricatus (Blume) de Laub. ( Podocarpaceae ).

Distribution: Brunei ( Temburong), Indonesia ( Kalimantan), Malaysia ( Sabah, Sarawak), Thailand ( Trang), and now in Vietnam [ Gia Lai province, K’Bang district, Son Lang commune (Kon Chu Rang Nature Reserve)].

Specimens examined: BRUNEI, Temburong district, Ulu Temburong National Park, Kuala Belalong Field Studies Centre; Ashton Trail ,

29.06.2012, D. C . Daly, J . D. Mitchell, M . Saleh, H . M .

Shamira & H.Y. Nisah 14434 (NY [NY01415083

digital image!]). MALAYSIA, Negeri Sembilan, Jelebu, Pasoh Forest Reserve ( FRIM),Nature Trail ,

13.06.2012, D. C. Daly, J. D. Mitchell, S. Kamarudin

& A. Angan 14304 ( NY [ NY10415084 digital image!]); Sabah, Nabawan district, Labou Forest Reserve, 28.05.1992, Fidilis Krispinus SAN130043 About SAN

(L [L2266837 digital image!]); Beluran district,

Sungai (Sg. “Sungai” River), Sapi Forest Reserve

Camp, 24.07.1963, Sayu Elleh 37447 ( L [ L2266840

digital image!]); Sandakan district, Jalan Hujong

Tanjong , Sepilok Forest Reserve, 01.06.1960, W .

Meijer SAN21715 (L [L2266842 digital image!]);

Sarawak, Sungai Sebuloh , Lundu, First Division, 01.10.1985, O . Ismawi S49908 View Materials ( L [ L2266844 ,

L 2266845 digital image!]); 7th Division, Ulu

Belaga, Sepakau logging camp, 06.11.1981,

Hansen C 973 ( L [ L 2266835 digital image!]); Ulu

Medamit, Limbang, 5th Division, 11.10.1972,

A. E. Wright & O. Ismawi 32304 ( L [ L 2266843 digital image!]); Sungai, Mengiong, Balleh, Kapit,

Third Division., 22.01.1970, O . Ismawi S.29689 ( L

[ L 2266839 digital image!]); Malaya, road to Bukit

Tinggi, 12.051983, K. M. Kochummen FRI 26253 View Materials ( L [ L2266863 digital image!]); Malaya, Johore, Rengam Virgin Jungle Reserve, 13.04.1971, K. M. Kochummen FRI16374 View Materials ( L [l2266872 digital image!); Malaya, Selangor, Sungai Buloh Forest

Reserve, 27.05.1970, K. M . Kochummen FRI16046 View Materials

( L 2266859, L 2266860 digital image!); Malaya,

Selangor, Ampang Forest Reserve, Catchment area , 06.06.1970, T. C. Whitmore FRI15161 View Materials ( L [ L2266858 digital image!]); Malaya, NE Johore, Lenggor forest reserve, 10.05.1968, T. C. Whitmore FRI8645 View Materials ( L [ L2266867 digital image!]); Malaya ,

Trengganu , Ulu S . Trengan , NW of Batu Bidan, 11.06.1968, P. F . Cockburn FRI10587 View Materials ( L

[ L 2266861 digital image!]), Malaya, N. Kelantan,

Kemahang, 27.06.1968, T. C . Whitmore FRI8879 View Materials ( L

[ L 2266865, L 2266866 digital images!]): Malaya,

Ulu Trengganu, Ulu S. Trengan, near K. Petang,

03.06.1968, P. F . Cockburn FRI8433 View Materials ( L [ L2266868

digital image!]); Malaya, Trengganu, Ulu S.

Trengan, Kg. Melaka, 07.06.1968, P. F. Cockburn ,

FRI 10534 ( L [ L 2266871 digital image!]); Malaya,

North Kelantan, Kemahang , 01.07.1968, Y. C .

Chan FRI 6686 ( L [ L 2266856, L 2266857 digital images!]); Malaya, 10th mile Dungu, Bukit Besi

Road, compt.12 B, Bukit Bauk FR, 18.06.1967, K. M .

Kochummen FRI 2399 ( L 2266864 digital image!),

Malaya, Sungai Buloh Forest Reserve, 08.06.1963,

K. M. Kochummen 94988 ( L 2266869 digital image!);

Malaya, Bukit Lagong Forest Reserve, Kuala

Lumpur, 06.08.1960, Ahmad 85227 ( L [ L2266862

digital image!]); Malaya, Selangor, Sungai Buloh,

Rubber Research Institute Experimental Estate,

forest clearing lately Forest Reserve, 23.11.1956,

H. M.Burkill & M.Shah, HMB.1037 ( L [ L 2266870

digital image!]). INDONESIA, East Kalimantan, Sepaku area, PT, ITCI, Kenangan, Balikpapan.,

08.03.1991, Ambri & Arifin AA117 ( L [ L2266846

digital image!]); West Kalimantan Province,

Gunong Bentuang area, 5-10 km North of Masa village, 150 km North East of Pontianak, Ridge system West of Semawang River, 13.06.1989,

J. S. Burley, Tukirin 2570 ( L [ L 2266847, L 2266848

digital images!]); Borneo, Bukit Raya, Tumbang

Sah, 03.02.1983, H . Wiriadinata 3502 ( L [ L2266841

digital image!]); Borneo, W. Kalimantan, NSF

312 ( L [ L2266836 digital image!]). THAILAND, Trang, Khao Chong , 12.03.1974, K. Larsen & S. S. Larsen 33254 (l [ L2266854 digital image!]); ibid .,

05.04.1971, S . Phusomsaeng 413 ( L [ L2266855

digital image!]; P [ P 06633071 digital image!]).

VIETNAM, Gia Lai province, K’Bang district, Son Lang commune, roadside forest margins, near the office area, N 14°29′33.42″, E 108°32′37.01″ GoogleMaps ,

1050 m, Kon Chu Rang Nature Reserve,

27.11.2023, in fruiting, Bui Hong Quang & Tran

Duc Binh TDB 336 ( HN [ HN 000080490!]); ibid., N 14°28′53.00″ E 108°32′55.07″, 980 m, 23.01.2024, in fruiting, Bui Hong Quang & Tran Duc Binh TDB 369 ( HN [ HN 000080490!]).