subsp. javanica Duyfjes & Pruesapan

De Wilde, Willem J. J. O. & Duyfjes, Brigitta E. E., 2012, Keys to and checklist of species of the genus Trichosanthes L. (Cucurbitaceae) in Indochina, Adansonia (3) 34 (2), pp. 265-278 : 275

b. subsp. javanica Duyfjes & Pruesapan

Thai Forest Bulletin. Botany 32: 99, fig. 6b (2004); W. J. de Wilde & Duyfjes, Flora of Thailand 9 (4): 536 (2008a); Flora Malesiana.Series 1. Spermatophyta 19: 308, fig. 89 (2010). — Type: Indonesia (Java) , De Wilde & Duyfjes 21777 (holo-, L; iso-, BO, K, L). DISTRIBUTION. — Southwestern Thailand and through Malesia to the Lesser Sunda Islands and the Moluccas .

REMARK In the subspecies javanica two varieties can be distinguished, one with completely white flowers ( var. javanica ), and one with bright yellow petalfringes ( var. flavofila W.J.de Wilde & Duyfjes ; Reinwardtia 12: 270 [2008b]), an endemic from Thailand, Kaeng Krachan National Park.

c. subsp. rotundata W.J.de Wilde & Duyfjes ( Fig. 2 )

Reinwardtia 12: 413 (2009); W.J.de Wilde, Duyfjes,

Phonsena & R.W.Ham, Thai Forest Bulletin. Botany 39: 18, fig. 6g (2011). — Type: Thailand (Sakon Nakhon) ,

Pooma, De Wilde, Duyfjes, Chamchoonroon & Phattara-

hirankanok 2574 (holo-, BKF; iso-, L)

Trichosanthes kirilowii auct. non Maxim.: Gagnep., Flore générale de l’Indo-Chine 2: 1044 (1921); Keraudren- Aymonin, Flore du Cambodge, du Laos et du Viêtnam 15: 84, pl. 13: 5 (1975).

DISTRIBUTION. — Thailand (excluding Peninsular),

Laos, Vietnam.

REMARKS ON SYSTEMATICS

This subspecies closely links up with the type-subspecies of T. tricuspidata , but markedly differs in the rounded edge of the seeds. It is possibly identical with (part of) a species accepted for Flora of China ( Huang & Jeffrey 2011), but it is not clear with which. The most obvious species of these are T. lepiniana Cogn. (type from S India), T. laceribractea Hayata and T. fissibracteata C.Y.Cheng & C.H.Yueh , but all have characteristics not completely agreeing. In Trichosanthes tricuspidata , subspecies tricuspidata and rotundata are similar in aspect. Apart for their seeds, subsp. rotundata differs in deeper laciniations in the male bracts (to nearly halfway deep) and in fresh specimens the male bracts are conspicuously pale (whitish), contrasting with the scattered dark green glands. The species Trichosanthes kirilowii Maxim. does not occur in Indochina. This name was accepted by Keraudren-Aymonin (1975: 84), but only the deeply divided 5-7-lobed leaves resemble that spe- cies. The specimens cited by Keraudren-Aymonin from Vietnam and Laos all belong to the present T. tricuspidata subsp. rotundata .

Figures

Fig. 2. — Trichosanthes tricuspidata Lour. subsp. rotundata W.J.de Wilde & Duyfjes: A, portion of branch with male inflorescences; B, portion of leafy twig with fruit; C, adult shallowly lobed leaf of fruiting specimen; D, seed; A, Phonsena & Patthum 5502 (L); B, Parnell et al. 95-270 (L); C, D, Maxwell 87-1224 (L). Scale bars: A-C, 2 cm; D, 2 mm.