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BLUMEA BLUMEA[Top of this page] [Catalogue of publications] [NHN]
The sections Azorelloida, Neoandina, and Paramensia of Geranium, all of them from the Andes, are taxonomically revised. Fruits with the ‘seed ejection-type’ dispersal have been found in all species, which allows classifying them within subg. Geranium. The sections Azorelloida and Paramensia consist of one and two species respectively, while section Neoandina comprises 24 taxa. Prior to this revision, the stemless species of Geranium from the Andes have been considered to belong to sect. Andina. Geranium sessiliflorum (type of Geranium sect. Andina), however, should be included in sect. Chilensia. Therefore, recently a new sect. Neoandina has been described to include most of the sect. Andina species (Aedo, 2000). Diagnostic morphological features are analysed and compared within and between the sections. The parsimony analysis suggested an early separation of sect. Paramensia from the rest of the ingroup constituted by the sections Azorelloida and Neoandina. These sections would later on have become separated into two groups: one with paramo species, and the other with more xerophilous, cold-resistant puna species. The biogeographic analyses using Fitch parsimony, dispersal-vicariance optimisation, and Bremer analysis support a paramo origin for the entire group in the North Andes, followed by a colonisation of southernmost regions (puna) and vicariance. A key, species descriptions, a complete list of synonymy, a list of specimens examined, and distribution maps are provided. Most species are illustrated for the first time. Fifteen lectotypes and one neotype are designated.
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A survey of the species of Ficus subg. Pharmacosycea sect. Oreosycea for the western Pacific region (excl. New Caledonia) with descriptions of and a key to the species presently recognised for the region is presented. Ten species are recognised, of which three species and one subspecies are new: F. bubulia C.C. Berg, F. magwana C.C. Berg, F. magwana subsp. maragona C.C. Berg, and F. setulosa C.C. Berg.
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A new species of Ficus subg. Urostigma sect. Malvanthera, F. baola C.C. Berg, is described.
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Magnolia section Maingola Dandy is distinguished from other members of Magnoliaceae by the combination of a terminal brachyblast, cylindrical fruits, and free stipules. Morphological characters were re-examined for section Maingola and section Alcimandra, which has been considered to be closely related to the former. Although section Alcimandra is separated from section Maingola in having long stamens which hide the gynoecium, it is combined with section Maingola because this feature is frequently found in various other taxa of the family. Moreover, recent molecular phylogenetic studies have also demonstrated the close affinity between sections Maingola and Alcimandra. For the Magnolia macklottii complex, which has been problematic due to the wide range of variation in taxonomically important characters, a principal component analysis was carried out for 28 characters. Two varieties, M. macklottii var. macklottii and var. beccariana, are recognised in the complex. They are distinguished from each other mainly by hairs on fruit and peduncle (glabrous (to glabrescent)/densely hairy). Hairs on the twig, the length of scars of perianth and stamens, and leaf shape, which were previously regarded as important characters, could not separate the two varieties. In this study, seven species with five varieties are recognised in section Maingola.
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A new species of Uvaria from Gabon is described.
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A new Momordica species from Côte d’Ivoire and Ghana is described.
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In the genus Horsfieldia 5 new taxa are proposed, viz. one from Vietnam: H. micrantha W.J. de Wilde, a new variety from Thailand: H. amygdalina Wall. var. macrocarpa W.J. de Wilde, one species from the Philippines: H. romblonensis W.J. de Wilde, one species and a new variety both from West Papua: H. platantha W.J. de Wilde and H. subtilis (Miq.) Warb. var. auctissima W.J. de Wilde. Apart from additions and notes to Asian genera in Myristicaceae, a description in English of Myristica yunnanensis Y.H. Li is given. Horsfieldia kingii, Knema curtisii, Myristica cinnamomea, and M. yunnanensis are new records for Thailand; H. majuscula is a new record for Borneo.
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Seed morphology of 45 taxa belonging to 23 genera of Brassicaceae were examined using light and scanning electron microscopy. The taxa included representatives of the tribes Arabideae, Euclidieae, Hesperideae, Lunarieae, Matthioleae, and Sisymbrieae, which all occur in Egypt. Macro- and micromorphological characters, including seed shape, colour, size, the position of the radicle relative to the cotyledons, epidermal cell shape, anticlinal boundaries, outer periclinal cell wall and relief of outer cell walls, are presented. Three types of basic anticlinal cell wall boundaries are recognised and six different shapes of the outer periclinal cell wall are described. A key for the identification of the investigated taxa based on seed characters is provided.
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A survey of Lepturus R.Br. (Gramineae) in Malesia is given. Monerma P. Beauv. is superfluous, and hence Monermeae an illegitimate tribal name. One new variety of L. repens (G. Forst.) R.Br. is described.
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A new species of Impatiens, I. punaensis Wiriad. & Utami from Punabesar, Central Sulawesi is described and illustrated for the first time.
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Three new species of the genus Lasianthus (Rubiaceae) from Vietnam are recognised as L. elevatineurus, L. longissimus and L. oblongilobus.
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A new species of Piper (Piperaceae), P. silhouettanum, is described from the Anse Mondon river valley, Silhouette Island, Seychelles. This species is close to P. nigrum but distinguished by its different venation, glabrous leaves, persistent elongated stipules and reduced bracts. This species is restricted to one valley where it is found in 1,7 hectares.
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Last modified april 24, 2006 by P. Hovenkamp.