![[logo]](../../images/nhnlogo.gif)
BLUMEA BLUMEA[Top of this page] [Catalogue of publications] [NHN]
A taxonomic revision of all genera belonging to Gentianaceae–Canscorinae, i.e., Canscora, Cracosna, Duplipetala, Hoppea, Microrphium, Phyllocyclus and Schinziella is presented, including keys to the taxa, distribution maps and seed coat descriptions. One new genus, one new species and seven new combinations are described. In total seven genera and 23 species are recognized. All taxa are of palaeotropical distribution with centres in India and SE Asia.
[Top of this page] [Catalogue of publications] [NHN]
A taxonomic account is given of six Piper species of New Guinea: P. bolanicum spec. nov., P. gibbilimbum, P. recessum spec. nov., P. subbullatum, P. triangulare and P. wabagense. These small shrubby trees are best represented in secondary growth and forest at 1300–2500 m altitude, with P. gibbilimbum reaching c. 3000 m and P. bolanicum (and rarely P. triangulare) c. 3500 m. Piper subbullatum, the most widespread of the six in New Guinea, sometimes descends to sea-level there and is also found in the Philippines and from the Bismarck Archipelago to Vanuatu.
The New World species P. aduncum and P. subpeltatum, adventive to New Guinea, are treated briefly.
Piper recessum spec. nov. has been confused with P. gibbilimbum and P. subbullatum but is a completely glabrous plant. Its inflorescences have fleshy, asymmetrically peltate, strongly overlapping bracts. At anthesis the bracts move apart slightly; in the male the anthers dehisce underneath the bract-heads, while in the female the stigmas become (only just) visible between the sides of the bract-heads. One or more species of thrips may be this plant’s pollinators.
[Top of this page] [Catalogue of publications] [NHN]
A revision of the genus Phyllagathis Blume is presented under a wider generic concept than used by earlier authors. This section of the revision will focus exclusively on the species in Borneo and Natuna Island. Eighteen species are endemic to Borneo, and only P. steenisii is endemic to Natuna Island, a small Indonesian island off the northern coast of Sarawak. One new species is described and several new combinations are established with the inclusion of pentamerous genera into Phyllagathis.
[Top of this page] [Catalogue of publications] [NHN]
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.
[Top of this page] [Catalogue of publications] [NHN]
A new monotypic genus from New Guinea is described. Its pollen matches that of the Cucurbitoideae–Melothrieae, except for its small size.
[Top of this page] [Catalogue of publications] [NHN]
The genus Paraderris (Miq.) Geesink is discussed, mainly for the Malesian area. Two new species, P. luzoniense and P. ornithocephalus are described. A key to the Malesian species is given. All currently recognized species are enumerated. All obligatory new combinations have been made.
[Top of this page] [Catalogue of publications] [NHN]
Alysicarpus Desv. is revised for the Flora Malesiana area. The recently described species A. aurantiacus Pedley is recorded for several localities in Papua New Guinea. Alysicarpus monilifer L. is recorded for Luzon (Philippines). The variability of A. vaginalis is discussed. A key for the Malesian species is presented.
[Top of this page] [Catalogue of publications] [NHN]
Despite the various taxonomic revisions of Abrus Adans., species and infraspecific delimitation are not always clear. In those revisions very little reference is made to micromorphological characters, in particular to those of the compound leaves, in spite of the stability of some of those characters. By using techniques of light and scanning microscopy this study reveals some interesting results concerning to leaflet surface, such as some of the characters of the epidermis cells, stomata, presence of papillae and trichomes. These characters show some range of variation at the species level but not at the subspecies level.
We conclude that those structures can provide additional characters useful in Abrus for species and infraspecific segregation. This study also supports Breteler’s delimitation of the African Abrus species.
[Top of this page] [Catalogue of publications] [NHN]
Millettia liberica Jongkind (Leguminosae–Papilionoideae) from the forests of western Africa is described and illustrated.
[Top of this page] [Catalogue of publications] [NHN]
A revised subgeneric subdivision of Ficus is proposed. Some important characters on which this sub-division is based are discussed, a key to the subgenera is presented. Distribution and relationships of the subgenera are briefly discussed.
[Top of this page] [Catalogue of publications] [NHN]
Nepenthes izumiae Troy Davis, C. Clarke & Tamin (Nepenthaceae), a new species from the Bukit Barisan, West Sumatra, Indonesia, is described.
[Top of this page] [Catalogue of publications] [NHN]
Zygogynum fraterculum, a new species of Zygogynum is described and illustrated.
[Top of this page] [Catalogue of publications] [NHN]
Two new species of Schizostachyum Nees: S. andamanicum and S. kalpongianum, are described and illustrated.
[Top of this page] [Catalogue of publications] [NHN]
Phyllanthus balgooyi Petra Hoffm. & A.J.M. Baker (Euphorbiaceae s.l. or Phyllanthaceae) is described from Palawan (Philippines) and Sabah (Malaysian Borneo) as a species of Phyllanthus sect. Emblicastrum. The species is restricted to ultramafic sites and easily identified by its unusual leaf venation and its jade-green sap. It is the second most visibly nickel-accumulating plant known to date.
[Top of this page] [Catalogue of publications] [NHN]
Last modified april 24, 2006 by P. Hovenkamp.