Uvaria vietnamensis C. Meade, 2005

Meade, Conor V., 2005, A new species of Uvaria (Annonaceae) from Southeast Asia, Adansonia (3) 27 (1), pp. 17-20 : 18-20

Uvaria vietnamensis C. Meade , sp. nov.

Uvaria fauveliana Pierre ex Jovet-Ast (1938) : 64 (nom. illegit.) (pro parte).

Uvaria fauveliana (Finet & Gagnep.) Pierre ex Jovet- Ast, Notul. Syst. (Paris) 9: 87 (1940) (pro parte).

non est U. hamiltonii Hook. f. & Thomson var. fauveliana Finet & Gagnep., Bull. Soc. Bot. France 53 Mém. 4: 68 (1906) et Fl. Gén. Indo-Chine 1: 52 (1907), type: Vietnam, “Insulae île de Phu Quoc, hab. in montibus, Raong Chiao, 3/1874, Pierre 1787” (hololecto-, P!; isolecto-, BM!, E!, K!, P [2 sheets]!); U. fauveliana (Finet & Gagnep.) Pierre ex Jovet-Ast, Notul. Syst. (Paris) 9: 87 (1940) (pro parte) = Guatteria rufa Dunal.

TYPUS. — Poilane 7326 (holo-, P; iso-, E) , Ba Na , 25 km NW of Dà Nang, Quang Nam Province, Vietnam, 24 July 1923 .

Species fructu epidermidebarbato tomentosa a congeneribus magno differt.

Species with a tomentose bearded fruit epidermis very different from other members of the genus.

Habit climber or scrambling shrub. Young shoots sub-tomentose, hairs ferruginous with 2-5 c. 1 mm long multi-cellular branches, bark smooth becoming striate and sparse with occasional persistent larger hairs. Leaves elliptic to narrowly obovate, (70-)90-225 × (35-) 40-75 mm, apex acuminate/acute, base narrowly cordate, subcoriaceous; veins 14-16; indument upper blade sparse to sub-tomentose, hairs simple, occasionally 2 branched, c. 1 mm long, midrib densely tomentose with erect 1 or 2+ branched hairs 0.75-1 mm long; lower midrib and blade sub-tomentose to sparse with 4-8 branched, c. 0.6- 0.85 mm long stellate hairs. Petiole 3-5 × 1.5-2 mm, indument sub-tomentose, stellate, hairs fine and pale coloured or more thickly set and ferruginous. Inflorescence not known. Fruit monocarps c. 3-20+, spheroidal, diameter c. 20-30 mm, covered with distinctive branched c. 5 mm long outgrowths, each covered with ferrugino-tomentose indument, pericarp red at maturity, flesh pale white, bittersweet to taste, stipes to 45 × 2 mm, striate with sub-tomentose indument, seeds 4-8, shortly hemi-ellipsoidal, c. 11 × 5.25-7 × 2-3 mm, aril prominent, 4 × 2.5-3 × 3 mm, surface leathery, brown, ruminations visible. — Fig. 1.

NOTES. — A rare plant, occuring from central Vietnam through southern Laos into northeastern Thailand in mixed deciduous or dry evergreen forest habitats above 100 m altitude.

VERNACULAR NAMES. — Laos, Mây khe cân (Poilane 11721), Ngaw keuah (Maxwell 98- 1053); Vietnam, Dây cham cham (Poilane 7326). Distribution is shown in Figure 2.

OTHER MATERIAL EXAMINED. — LAOS. Savannakhet Province, km 20 on the road from Savannakhet to

mm

10

113°E 13°N

6°N 96°E

Quang Tri, 21 Jan. 1925, Poilane 11721 ( E, P) ; Champasak Province, summit of Hang Kohn Hill, southern tip of Khong island, Khong District , 20 Sept. 1998, Maxwell 98-1053 ( CMU) .

THAILAND. Ubon Ratchatani Province , Soi Sawan Waterfall, 16 Oct. 1998, Chalermglin & Meade 98-10- 16-03 ( TCD) .

VIETNAM. “Annam, Massif de la Mère et l’Enfant”, Quang Tri Province, Vietnam, 24 May 1923, Poilane 6699 ( P); Quang Nam Province, May-July 1927, J & M . S . Clemens 3827 ( BM, NY, P, U) .

Figures

FIG. 1. — Uvaria vietnamensis C. Meade sp. nov.: A, general habit; B, monocarp showing tomentose bearded epidermis; C, section through monocarp showing seeds in two rows. All drawings from Clemens 3827.

FIG. 2. — Distribution of Uvaria vietnamensis C. Meade sp. nov. (▲).