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BLUMEA BLUMEA[Top of this page] [Catalogue of publications] [NHN]
Mallotus sections Hancea and Stylanthus from Malesia are revised. Descriptions, distribution ranges, habit drawings and keys to all the species in these two sections are provided. The diagnostic characters for the sections are discussed briefly in the section headings. Mallotus section Hancea is defined more precisely than before, resulting in the exclusion of 4 species from this section (M. brachythyrsus, M. havilandii, M. insularum (new rank) and M. miquelianus). Mallotus beccarii is synonymised with M. brachythyrsus, and M. tenuipes with M. penangensis. This section contains 12 species. In Mallotus section Stylanthus, M. oblongifolius is synonymised with M. peltatus. This section contains 6 species.
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Mallotus kongkandae is a new species in section Rottlera. Typical are the ovate leaves, greenish glandular scales when dry, thick-walled fruits, and the seemingly caducous columella. The plant is endemic to northern Thailand.
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The genera Agrostistachys and Chondrostylis, subtribe Agrostistachydeae, have been revised. Chondrostylis comprises two species, C. bankana appears to be much more widespread than was assumed. Agrostistachys comprises six species, one of which is new (A. staminodiatus), while several species (e.g. A. intramarginalis and A. meeboldii) have been reduced to the now quite variable A. borneensis, formerly mainly known as A. longifolia. A phylogenetic analysis of the subtribe Agrostistachydeae shows that all four genera (also Cyttaranthus and Pseudagrostistachys) are monophyletic; however, the position of Agrostistachys is very weak and the genus may easily change to a paraphyletic group with the other genera nested in it. Even in spite of the weak support for Agrostistachys all genera are maintained in their present circumscription.
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The genus Endiandra R.Br. (Lauraceae) has not been revised since Meissner (1864). Flora treatments and local revisions for this genus of about 100 species have been produced for Peninsular Malaysia (Kochummen, 1989) and Australia (Hyland, 1989) with ten and thirty-eight species, respectively. A revision of Endiandra in Borneo contributes to the taxonomic understanding of the genus. Eight species, with a possible ninth imperfectly known species, are recognized on the island. Three species, E. immersa, E. elongata, and E. rhizophoretum, are described as new; the five other species are E. clavigera Kosterm., E. ochracea Kosterm., E. kingiana Gamble, E. macrophylla (Blume) Boerl., and E. rubescens (Blume) Miq.; E. rigidior Kosterm. is an imperfectly known species. A key to the eight species, and descriptions, illustrations, discussions, and distribution maps of each species are provided.
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Lauraceae are an important component of wet tropical forests and are well represented in the Flora Malesiana region. Their identification has been hampered by two factors: several of the genera are poorly defined and existing keys require both flowers and fruits, which are, however, rarely present together on a specimen. Here a key based almost entirely on flowering specimens is presented, problems in generic delimitation are discussed and vegetative characters helpful in generic identification are listed.
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The genus Mezzettiopsis Ridl. (Annonaceae) is revised and transferred to Orophea Blume subgenus Sphaerocarpon Keßler. Phylogenetic analysis of subgenus Sphaerocarpon and Mezzettiopsis places Mezzettiopsis within the subgenus. Furthermore, the prevalence of common or overlapping character states and the paucity of unique character states necessitate the transfer. Two species were transferred from Mezzettiopsis. Of these, one species of Orophea is reinstated and one new combination is made. Three species are described as new. In total, nine species are fully described. Sphaerocarpon is a subgenus of small, tropical, lowland trees distributed from Sulawesi westwards to South India. It is characterised by having sepals and outer petals that are sessile or nearly sessile and more or less ovate, with outer petals that are twice the size of the sepals, inner petals that are clawed, roughly diamond-shaped and connivent during development at the edges of the lamina, by miliusoid stamens, by stipitate, globose to oblongate carpidia, and by glabrous to pubescent leaves. A key to the flowering material is presented.
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Coelostegia is a small Bombacaceae genus from western Malesia (Peninsular Malaysia, Sumatra and Borneo). Soegeng Reksodihardjo (1960), in his revision of the genus recognizes five species. Since Soegeng’s work no attempt at a revision has been made and no new species have been described. Coelostegia and Durio are very difficult to distinguish by vegetative characters only. Flower and fruit characters are very important for species recognition. During field work in the Kayan Mentarang National Park, East Kalimantan, Indonesia, the author collected specimens of a Coelostegia-like plant that proved to be a new species.
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Hodgsonia, ranging from NE India through S China to Java and Borneo, was for a long time con-sidered as monotypic, but there are two (and possibly three) species, demarcated at the Isthmus of Kra in S Thailand. The few, woody ‘seeds’ should be regarded as pyrenes, a condition not known elsewhere in the family Cucurbitaceae.
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Based on the specimens collected from Thailand and preserved in AAU, BKF, C, and KYO, Campylandra siamensis (Convallariaceae, Liliaceae s.l.) is newly described in this paper. This species is similar to C. chinensis (Baker) M.N. Tamura, S. Yun Liang & Turland, but differs from it in having numerous sessile leaves, longer white bracts, longer perianth tube and larger pistil.
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Schizomeria carrii H.C. Hopkins, a new species from the Owen Stanley Mountains of Papua New Guinea, is described and illustrated.
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Fittingia grandiflora (Myrsinaceae), a new species from New Guinea, is described and illustrated. It is easily distinguished from its congeners by its relatively large flower and the highly united corolla.
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Madhuca eriobrachyon P. Royen is sunk into M. borneensis P. Royen and this species is redescribed. Two species, M. primoplagensis and M. vulpina, are described.
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Last modified april 24, 2006 by P. Hovenkamp.