Keys to and checklist of species of the genusTrichosanthesL. (Cucurbitaceae) in Indochina

Willem J J O De Wilde,Brigitta E E Duyfjes

doi:10.5252/a2012n2a6

Abstract

In this account the genus Trichosanthes L. has 20 species occurring in Thailand, Cambodia, Laos and Vietnam. Since the treatments in Flore du Cambodge, du Laos et du Viêtnam (Keraudren-Aymonin 1975; 10 species), and in Flora of Thailand (De Wilde & Duyfjes 2008a; 17 species) more knowledge by fieldwork in Thailand has become available resulting in the inclusion for Thailand of the taxa T. baviensis Gagnep., T. pedata Merr. & Chun, T. tricuspidata Lour. subsp. rotundata W.J.de Wilde & Duyfjes. For Cambodia, Laos and Vietnam of the species T. dunniana H. Lév., T. erosa Duyfjes & Pruesapan var. erosa, T. inthanonensis Duyfjes & Pruesapan, T. fissibracteata C.Y.Cheng & C.H. Yueh, T. tricuspidata Lour. subsp. rotundata W.J.de Wilde & Duyfjes, and T. truncata C.B.Clarke. Two keys to the species are presented, one for male flowering specimens, and one for fruiting specimens, as well as for each species literature references, distribution and occasional other information.

Highlights

Trichosanthes L., which is dioecious, except for T. cucumerina L., is by far the largest genus of Cucurbitaceae Juss. in Southeast Asia, with about 100 species ranging from India and China east to Australia
Since the treatment of the family Cucurbitaceae for the Flore du Cambodge, du Laos et du Viêtnam (Keraudren-Aymonin 1975), additional collecting in the genus Trichosanthes in that area has been limited
For Thailand, 17 species were accepted (Duyfjes & Pruesapan 2004; De Wilde & Duyfjes 2008a), but through enhanced interest in the genus more additional material was collected and in Thailand two more species, T. baviensis Gagnep. and T. pedata Merr. & Chun came to light (De Wilde et al 2011)

Summary

INTRODUCTION

Trichosanthes L., which is dioecious, except for T. cucumerina L., is by far the largest genus of Cucurbitaceae Juss. in Southeast Asia, with about 100 species ranging from India and China east to Australia. Remark This species became known for Thailand after the treatment of the family Cucurbitaceae in Flora of Thailand (De Wilde & Duyfjes 2008a). 1c (2004); W.J.De Wilde & Duyfjes, Flora of Thailand 9 (4): 518 (2008a); Huang & Jeffrey in Lu & Jeffrey, Flora of China, http://efloras.org: species no. — Type: S China, Esquirol 726 (holo-, E; iso-, K) This species, indigenous and widely cultivated in India, was found only once in Vietnam (d’Alleizette 2611 [L]) growing in a hedgerow near Hanoi, possibly an escape from cultivation.

Trichosanthes kerrii Craib

19. Trichosanthes villosa Blume