W.J.J.O. de Wilde

Redefinition of Zehneria and four new related genera (Cucurbitaceae), with an enumeration of the Australasian and Pacific species

The genus Zehneria Endl. is split into 5 genera, of which 4 are new: Indomelothria, Neoachmandra, Scopella, and Urceodiscus. Apart from several new combinations and taxa of subspecific rank, the following species are described as new: I. chlorocarpa, N. backeri, N. lancifolia, N. macrantha, N. nesophila, N. platysperma, U. arfakensis, U. carrii, U. hippocrepicus, U. parviflora, U. scabridula, U. viridis, Z. elbertii, Z. erythrobacca, Z. immarginata, Z. neocaledonica, Z. pedicellata, Z. pisifera, Z. tahitensis, and Z. trullifolia. The New World genus Melothria was introduced in Asia where it is represented by one species, M. pendula L.

REVIEW OF THE GENUS GYMNOPETALUM (CUCURBITACEAE)

Gymnopetalum Arn. is distributed from India to the Moluccas. There are 4 species, including 1 new species, G. orientale W.J. de Wilde & Duyfjes, from E Malesia. In G. integrifolium (Roxb.) Kurtz 2 new varieties, besides the type-variety, are accepted: G. integrifolium var. penicaudii (Gagnep.) W.J. de Wilde & Duyfjes (in China) and G. integrifolium var. pectinatum W.J. de Wilde & Duyfjes (in E Java). A key to the species is presented. The Malesian taxa are fully described.

Revision of Neoalsomitra (Cucurbitaceae)

Neoalsomitra contains 11 species, one of which, N. clavigera, is widespread, covering the whole range of the genus from NE India and S China into Australia and the Pacific. The genus is heterogeneous in having species with free stamens and species with the filaments connate; however, this cannot be used for subdivision. Neoalsomitra hederifolia and N. schefferiana are podagric succulents, i.e. with thickened stem-bases. Neoalsomitra pilosa W.J. de Wilde & Duyfjes (New Guinea) is newly described; new combinations are N. hederifolia (Decne.) W.J. de Wilde & Duyfjes and N. schefferiana subsp. podagrica (Steenis) W.J. de Wilde & Duyfjes.

Papuasicyos, a new genus of Cucurbitaceae

A new monotypic genus from New Guinea is described. Its pollen matches that of the Cucurbitoieae–Melothrieae, except for its small size.

Gynostemma (Cucurbitaceae) in Thailand andMalesia

The genus Gynostemma is represented in Thailand and Malesia by four species of which the extremely variable G. pentaphyllum is widespread covering the whole area. Seven forms are recognized in G. pentaphyllum, of which three are new: forma fasciculare W.J. de Wilde & Duyfjes, forma grandiflorum W.J. de Wilde & Duyfjes, forma knemandrum W.J. de Wilde & Duyfjes, and three are new combinations: forma dasycarpum (C.Y. Wu) W.J. de Wilde & Duyfjes, forma pubescens (Gagnep.) W.J. de Wilde & Duyfjes, and forma simplicifolium (Blume) W.J. de Wilde & Duyfjes. Two new species, both endemic to New Guinea, are described: G. intermedium W.J. de Wilde & Duyfjes and G. papuanum W.J. de Wilde & Duyfjes.

SCOPELLARIA, A NEW GENUS NAME IN CUCURBITACEAE

With the publication of the redefinition of the genus Zehneria and some resembling genera in sE Asia, it appeared that the name Scopella W.J. de Wilde & duyfjes is a homonym of the older Scopella Mains (1939). Therefore, a new name for the genus Scopella and the necessary new combinations for its specific and intraspecific taxa are proposed. for a key to these and their descriptions see de Wilde & duyfjes (2006).

Lagerstroemia (Lythraceae) in Malesia

An enumeration of the 11 indigenous species of Lagerstroemia accepted for the Malesian area is presented with additionally three cultivated species. It includes descriptions of 6 species, notes, synonyms, and keys for flowering and fruiting specimens. All names are typified. Studied herbarium collections, mainly in L, are briefly mentioned.

The subtribe Thladianthinae (Cucurbitaceae) in Indochina and Malesia

Of the seven genera which constitute the subtribe Thladianthinae five occur in our area. Full descriptions are given of the genera and species not treated previously by us. Two new species have been described: Sinobaijiania smitinandii W.J. de Wilde & Duyfjes and Thladiantha angustisepala W.J. de Wilde & Duyfjes.

Review of the genus Solena (Cucurbitaceae)

The genus Solena Lour. is redefined, and its 3 species and 1 subspecies are keyed out and described: S. amplexicaulis occurs in S India, S. heterophylla, with 2 subspecies is widespread, but does not occur in S India, and S. umbellata (Klein ex Willd.) W.J. de Wilde & Duyfjes, comb. nov., occurs in S India and Sri Lanka. The status of S. heterophylla subsp. napaulensis (Ser.) W.J. de Wilde & Duyfjes, comb. & stat. nov. needs further study as this subspecies is very similar to the more widespread subsp. heterophylla, but it is distinct by sigmoid thecae. Solena amplexicaulis is taxonomically more distinct from the other two species of Solena. In southern India Kedrostis foetidissima much resembles Solena in general habit, especially by the more or less amplexicaul leaves, and therefore it is discussed and keyed out against Solena.

The genus Baijiania (Cucurbitaceae)

The genus Baijiania, originally thought to be indigenous in China and Borneo, appears to be restricted to Borneo. The only species is Baijiania borneensis, with two varieties, the type variety and var. paludicola Duyfjes, var. nov.