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BLUMEA BLUMEA[Top of this page] [Catalogue of publications] [NHN]
The genus Alyxia is revised for Australia and the islands of the Pacific Ocean as the second and final part of a complete revision of the genus. 39 species are recognised for this area of which three are new to science, two are new combinations and one is a new name. 14 species are found in Australia and its offshore territories, 21 species in New Caledonia and the Loyalty Islands, and seven species in the other islands of the Pacific. There is relatively little overlap between regions: two species are found in Malesia and Australia; one species is found in New Guinea and the Solomon Islands; one species in Vanuatu and New Caledonia; and A. stellata is found in Australia, New Caledonia and into the Pacific as far as Hawaii and Henderson Island. Keys and descriptions for the species are given. Alyxia stellata and A. tisserantii are particularly variable and in need of further study. The new species are A. evansii D.J. Middleton, A. solomonensis D.J. Middleton and A. veillonii D.J. Middleton; the new name is A. mucronata D.J. Middleton; and the new combinations are A. poyaensis (Boiteau) D.J. Middleton and A. tropica (P.I. Forst.) D.J. Middleton.
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Some Malesian species of Pouteria (Sapotaceae)
Wim Vink
Some Malesian species of Pouteria are described or redescribed in view of new or additional material. In some taxa a wide variability is found. It is proposed to accept Pennington’s system of the Sapotaceae as final, because the century-long battle over the systematics of that family has seriously havocked its taxonomy.
Presented are: additions to the descriptions of Pouteria garcinioides, P. lamii, P. obovata, and P. occidentalis, redescriptions of P. anteridifera, P. cyclopensis, P. densinervia, P. kaernbachiana, P. keyensis, P. lanatifolia, P. ledermannii, P. monticola, P. thyrsoidea, and P. vrieseana, and descriptions of the new species P. gillisonii, P. menait, P. orkor, P. pullenii, P. ridsdalei, P. wandae, and P. whitmorei.
Planchonella dies-reginae P. Royen is transferred and becomes Pouteria dies-reginae (P. Royen) Vink.
Palaquium komakomar P. Royen becomes a synonym of Pouteria anteridifera (Lane-Poole) Baehni, Planchonella clementis H.J. Lam of Pouteria ledermannii (K. Krause) Baehni, and Planchonella maculata P. Royen of Pouteria monticola (K. Krause) H.J. Lam.
Pouteria rhopalocarpa P. Royen is transferred from sect. Pierrisideroxylon to sect. Oligotheca.
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Micrococca is a rare genus represented in the Malesian region by only three species. Micrococca mercurialis (L.) Benth. is widespread, but in Malesia it is found only in Peninsular Malaysia. Micrococca malaccensis Airy Shaw and M. johorica Airy Shaw are both endemic to Johore. Micrococca can be distinguished from its close allies, Erythrococca and Claoxylon, by its interrupted racemes (with long internodes), pistillate flowers with elongated (strap-like) disc lobes, and a deeply 3-lobed, thinly crustaceous capsule dehiscing both septicidally and loculicidally. Micrococca mercurialis is a small-leaved shrub, while the other two species are trees with much larger leaves. Micrococca johorica has glands on the leaf bases, narrow leaves, and short inflorescences, whereas M. malaccensis lacks glands on the leaf bases, has wider leaves, and longer inflorescences.
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In Malesia there are 25 taxa of Eragrostis (Gramineae, Chloridoideae, Eragrostideae), incl. Ectrosiopsis (Ohwi) Jansen. Eight, perhaps eleven species are introduced. Eragrostis balgooyi Veldk. is here described as new. Eragrostis amabilis (L.) Nees is the correct name for E. tenella (L.) Roem. & Schult. The combination E. elongata (Willd.) Jacq. has been applied to at least eight taxa ranging from Sri Lanka to Australia, and the younger synonym, E. diandra (R.Br.) Steud., is used here.
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Last modified april 24, 2006 by P. Hovenkamp.