Showing papers in "Blumea in 1987"

A systematic revision of the Mangrove genus Sonneratia (Sonneratiaceae) in Australasia

Abstract: In Australia, New Guinea and the southwestern Pacific seven taxa are recognised in Sonneratia, of which three species are redescribed in view of their Indo-Malesian counterparts ( S. alba, S. caseolaris, S. ovata), one species is redescribed from its most likely Indo-Malesian equivalent (S. lanceolata, being distinct from S. caseolaris), one widespread hybrid is fully described (S. x gulngai being the putative synonym of S. alba x S. caseolaris), and two other hybrids (S. alba x S. gulngai, S. alba x S. lanceolata) of very limited occurrence are described as sub-units of their closest ‘parental’ forms. A key, descriptions and full synonymy are given as well as 2 distribution maps, 6 other figures and one table.

A revision of Oryza (Gramineae) in Malesia and Australia

Abstract: In Malesia and Australia there are nine species of Oryza L. (Gramineae). Oryza meyeriana (Zoll. & Mor.) Baillon has two varieties. Oryza schlechteri Pilg. is only known from Irian Jaya (Indonesian New Guinea). Oryza australiensis Dom. and O. meridionalis Ng are endemic to Australia. The numerous forms of O. sativa L. have not been treated. Oryza rufipogon Griff., supposedly the wild progenitor of O. sativa, is considered as a distinct species. The name for the subfamily Oryzoideae is validated.

Notes on Magnoliaceae. II: Revision of Magnolia sections Maingola (Malesian species), Aromadendron, and Blumiana

Abstract: These notes are sequel to the Notes on Magnoliaceae in Blumea 31 (1985) 65-121. First the addenda to those notes are given. Then follows a revision of the species of Magnolia which belong to the sections Aromadendron and Blumiana, and the Malesian species of section Maingola. A survey with SEM photos is given of the undersurfaces of the leaves of sections Maingola and Aromadendron, to assist in identifying the species. A key to the sections is given, a key to the species of sections Maingola and Aromadendron together, and keys to the species of each section. In section Maingola 5 species are recognized for Malesia. Michelia beccariana Agostini and Magnolia aequinoctialis Dandy are reduced to Magnolia macklottii var. beccariana (Agostini) Noot. Magnolia carsonii Dandy ex Noot. with var. carsonii and var. drymifolia Noot., M. phaulantha Dandy ex Noot. and M. uvariifolia Dandy ex Noot. are newly described. In section Aromadendron also 5 species are recognized. Talauma bintuluensis Agostini is renamed Magnolia binluluensis (Agostini) Noot. and Aromadendron nutans Dandy is reduced to that species. Magnolia ashtonii Dandy ex Noot., M. borneensis Noot., and M. pahangensis Noot. are newly described. In section Blumiana 7 species are recognized. Magnolia pachyphylla Dandy, Talauma andamanica King, T. athliantha Dandy, T. borneensis Merr., T. forbesii King, T. gitingensis Elmer, incl. var. glabra Dandy and var. rotundata Dandy, T. gracilior Dandy, T. inflata P.Parm. [= T. undulatifolia Agostini], T. kunstleri King, T. miqueliana Dandy, T. oreadum Diels, T. peninsularis Dandy, T. rabaniana Craib, T. rubra Miq., T. sebassa Miq. ex Dandy, T. sumatrana Agostini, and T. soembensis Dandy are reduced to Magnolia candollii (Blume) H. Keng var. candollii. Talauma betongensis Craib, T. hodgsoni Hook. f. & Thomson, T. levissima Dandy, T. oblanceolata Ridley, and T. obovata Korth. are reduced to Magnolia candollii var. obovata (Korth.) Noot. Talauma angatensis (Blanco) Vidal and T. villariana Rolfe are reduced to M. candollii var. angatensis (Blanco) Noot. Talauma beccarii Ridley is reduced to M. candollii var. beccarii (Ridley) Noot. Talauma kuteinensis Agostini and T. singapurensis Ridley are reduced to M. candollii var. singapurensis (Ridley) Noot. Talauma gigantifolia Miq. is renamed Magnolia gigantifolia (Miq.) Noot. to which T. megalophylla Merr. and T. magna Agostini are reduced. Talauma sarawakensis Agostini [= T. intonsa Dandy] is renamed Magnolia sarawakensis (Agostini) Noot. In M. persuaveolens Dandy [= Talauma persuaveolens (Dandy) Dandy] the subspecies rigida Noot. is newly described with var. rigida and var. pubescens Noot. Finally Magnolia lasia Noot. and M. mariusjacobsii Noot. are newly described.

The early development of inflorescences and flowers of the oil palm (Elaeis guineensis Jacq.) seen through the scanning electron microscope

Abstract: The development of inflorescences and flowers of the African Oil Palm up to anthesis is illustrated by scanning electron microscopy images. The time of origin relative to the development of the foliage leaves of the basipetalous succession of flowering rachillae is determined, as well as the time of morphological sex definition. The logical stage when sex is determined is inferred to be not before the first appearance of the spikelet primordia. Female flower groups develop acropetally as triaxial cincinni, the male units as reduced ones. A developmental diagram is added.

A review of the fern genus Hypolepis (Dennstardtiaceae) in the Malesian and Pacific regions

Abstract: Fourteen species and one subspecies of the fern genus Hypolepis Bernh. are recognised in the Malesian and Pacific regions, excluding Australia and New Zealand. Three species, H. hawaiiensis, H. malesiana and H. scabristipes, and one subspecies, H. elegans subsp. carolinensis, are described for the first time. Two widely misapplied names, H. punctata (Thunb.) Mett. and H. tenuifolia (Forst. f.) Bernh. are more clearly defined. Descriptions, distributional data and a key for identifying all fourteen species are provided. Five species, H. alpina, H. archboldii, H. bamleriana, H. malesiana and H. scabristipes, are confined to the Malesian region; four species, H. brooksiae, H. pallida, H. polypodioides and H. punctata, extend also to the Asian mainland; three species, H. dicksonioides, H. elegans and H. hawaiiensis, are confined to the Pacific region and two, H. glandulifera and H. tenuifolia, have a wide distribution from mainland Asia to the Pacific. Four species, H. dicksonioides, H. elegans, H. glandulifera and H. tenuifolia, are shared with Australia and New Zealand where a further eight endemic species occur.

Notes on some Ceramiaceae (Rhodophyta) from Curaçao, especially those from the exposed northeast coast

Abstract: Twenty-five species of the red algal family Ceramiaceae are reported from the exposed northeast coast of the Caribbean island of Curacao. Some of the more interesting finds are discussed in some detail, and one species, Spermothamnion antillarum, is described as new to science. Twelve species are recorded from the island for the first time. A survey of all Ceramiaceae ever recorded from Curacao yields a total of 60 species, an uncommonly high number for any Caribbean region. Explanations for this high number may be found in the large variety of habitats and the relatively intense study the marine environment has undergone on this island.

A revision of the genus Maesa Forsk. (Myrsinaceae) in New Guinea, the Moluccas, and the Solomon Islands

Abstract: A taxonomic revision of the genus Maesa Forsk. in New Guinea and the adjacent areas (mainly Moluccas and Solomon Islands), comprising 26 species, of which 9 are new to science. A key to the species, full descriptions of all taxa, and an enumeration of the collections studied are given.

Revision of the genus Nageia (Podocarpaceae)

Abstract: Because of changes in nomenclature rules the species previously included in Decussocarpus are moved to Nageia.

The genus Lerchea (Rubiaceae)

Abstract: Lerchea Linn., a genus from Sumatra and Java, is revised. Eight species are recognized. Two new species, L. corymbosa and L. parviflora, are described. One variety has been raised to species, L. beccariana. A key, descriptions, illustrations, and distribution maps for all species are provided. Raphides are shown to be present in Lerchea and the two closely related genera Xanthophytum and Pomazota. Hence these three genera are transferred from Pomazotoideae-Pomazoteae to Rubioideae-Hedyotideae. Two cladograms are given, one of Lerchea, the other showing the relationship between Lerchea, Xanthophytum, and Pomazota.

The genus Rubus (Rosaceae) in Malesia. 3. The subgenus Micranthobatus

Abstract: Subgenus Micranthobatus is separated again from subg. Lampobatus sensu Focke (1911). The c.12 species have a scattered area of distribution, suggesting an old Gondwanan history. In Malesia five species are endemic in New Guinea (incl. New Britain), one is distributed in Borneo, the Philippines and Celebes. Two new species are described and one new variety. A key to the Malesian species is given. Remarks are made about two Australian species.

A taxonomic revision of the genus Lecanopteris (Polypodiaceae) in Sulawesi, Indonesia

Abstract: The species of Lecanopteris s.l. native to Sulawesi, Indonesia, are revised; eight species are recognized, of which L. celebica Hennipman and L. holttumii Hennipman are new.

The genera Embelia Burm. f. and Grenacheria MEZ (Myrsinaceae) in New Guinea

Abstract: A taxonomic revision of the genera Embelia Burm. f. and Grenacheria Mez in New Guinea incl. the Solomon Islands, comprising 12 species, of which 5 are new to science. A key to the species, full descriptions of all taxa, and an enumeration of the collections are given.

Further supplementary data on Malesian Knema (Myristicaceae)

Abstract: New material of Knema, mainly from Borneo, necessitated the description of 5 new species, 1 new subspecies, and 2 varieties, viz. Knema latericia subsp. latericia var. subtilis, K. stylosa (stat. nov.), K. viridis, K. glauca var. riparia, K. stenophylla subsp. longipedicellata (comb. et stat. nov.), K. subhirtella, K. mogeana, and K. riangensis. Altogether 14 species are commented upon. The new taxa have been inserted in the general key and regional keys to the species as presented in Blumea 25 (1979) and 27 (1981). At present 90 species in total are recognized in Knema. An index to names of taxa supplementary to that given in 1979 has been added.

Stamen venation in the Winteraceae

Abstract: Stamen venation is described for all species of Pseudowintera and an interspecific hybrid; the single species of Exospermum, several species of Belliolum, Drimys, Tasmannia (syn. Drimys sect. Tasmannia) and Zygogynum, as well as one species of Bubbia. One, two and three-veined stamens were found in several taxa, in contrast to previous reports that invariably stamens have a single (median) vein. The presence of isolated, apparently vestigial, lateral veins in many stamens of some taxa, seems evidence there has been an evolutionary reduction from three- to one-veined stamens. In view of the antiquity of the Winteraceae, this lends support to the hypothesis of Bailey and Nast, that three-veined stamens are a primitive feature of the woody Ranales. No obvious correlation was found between stamen morphology and type of pollinator.

Note on the morphology of the male inflorescences in Cercidiphyllum (Cercidiphyllaceae)

Abstract: Male reproductive axes are described which have three pairs of decussate bracts, some with free axillary groups of stamens. The developmental stages are demonstrated by scanning electron microscopy (SEM). The view, earlier advanced for the female counterparts, that these reproductive axes are reduced polyaxial systems, is supported.

New taxa of Pandanus (Pandanaceae) from Malesia and Papuasia

Abstract: Monographic studies in Pandanaceae continue to yield previously unrecognized taxa both at specific and higher ranks. In Pandanus, with the increase of knowledge of staminate structures becoming available through better collections and more critical observations, use of staminate characters integrated with previously known data is providing important new insights into infrageneric taxa and their affinities, as well as completing the fundamental descriptions at species rank important for both systematic and ecological studies. In the results reported here two new species, Pandanus calvus and P. kosteri, and two new sections, Hastatistigma (based on P. vinaceus) and Macrokurzia (based on P. daymanensis) are proposed. Two species previously known only from pistillate materials, P. cernuifolius and P. irregularis, are clarified by description of staminate specimens, while in the case of P. copelandii, a previously unrecognized staminate feature is described. Field data for the inadequately known species P. leptocarpus are provided, and the first illustrations of the type specimen (staminate) of P. houlletii are provided. These taxa are discussed under the subgenera to which they are referred in the synopsis (Stone, 1974).

A study of the trichomes of several frequently confused species of Cissus L. (Vitaceae)

Abstract: Scanning electron microscope studies of the indumentum of Cissus adnata Roxb., C. assamica (Laws.) Craib and C. aristata Blume, show that the structure of the trichomes varies between taxa but is consistent within each taxon. These three species are distinct and easily recognised by the nature and distribution of these trichomes although they have been frequently confused in the literature with respect to their circumscription and synonymy. Cissus adnata, which extends from India to Australia, has both multicellular, uniseriate and unicellular 2-armed trichomes on the abaxial leaf surface, glabrous stipules and pubescent ovary; C. assamica found from India to New Guinea has unicellular, 2-armed hairs sparsely distributed, glabrous stipules and ovary; C. aristata extending from Burma to Papua New Guinea has scattered unicellular, 2-armed hairs, pubescent stipules and glabrous ovary. There are 4 text-figures.

Motleyia, a new genus of the Ribiaceae from Borneo

Abstract: The monotypic genus Motleyia (Rubiaceae) and the species M. borneensis are described on material from NW. Borneo. It is similar to Prismatomeris, from which it differs by the morphology of stipules, leaves, flowers, fruits and pollen grains and the occurrence of colleters inside the calyx limb.

Laumoniera, a new genus of Simaroubaceae from Sumatra

Abstract: The monotypic genus Laumoniera (Simaroubaceae) and the species L. bruceadelpha are described on a collection from Jambi Province, Sumatra, Indonesia.

Additions to Horsfieldia (Myristicaceae) including four new species

Abstract: New facts about various of the hundred species recognized in the recent revision of the Asian-Malesian genus Horsfieldia (Myristicaceae), as well as the description of four new species in this genus (H. urceolata, H. coryandra, H. elongata, H. discolor) are presented.

A revision of Leptonychia (Sterculiaceae) in Southeast Asia

Abstract: Leptonychia Turcz. (Sterculiaceae) has three species in Southeast Asia, one of which was formerly included in the monotypic genus Leptonychiopsis Ridley. A new combination is proposed for it and a new variety described.

In Memoriam C.G.G.J. van Steenis (1901—1986)

Abstract: As could be announced summarily in the previous issue of Blumea, Professor Van Steenis died on 14 May 1986, after a short illness. In 1926 his first publications about Malesian plants came from the press, and so it has been a period of sixty years that he has devoted his life to the study of the Malesian flora. In Blumea 20 (1), 1972, at the occasion of his retirement as professor of Leiden University and director of the Rijksherbarium, two papers were published by, respectively, Mrs. M.J. van Steenis-Kruseman and Dr. M. Jacobs. Together they give a fairly extensive biographical picture and there seems to be no reason to reiterate the biographical facts at great length. A few highlights may suffice.

A revision of Evodiella (Rutaceae)

Abstract: Evodiella B.L. v.d. Linden (Rutaceae) from New Guinea and Queensland has two species: Ev. muelleri (Engl.) B.L. v.d. Linden with three formae: forma dinggi Veldk. & Rouwenhorst, forma nova, forma kanange Veldk. & Rouwenhorst, forma nova, and forma muelleri, and Ev. velutina Veldk., spec. nov., from the Eastern Highlands.

Rediscovery of Pronephrium thwaitesii (Thelypteridaceae), a little known and long lost fern

Abstract: Pronephrium thwaitesii, known only from two collections from Ceylon and one from South India, all made more than a century ago and not found any more in these localities, is reported from Silent Valley (Malabar, South India) and described. It is a sterile hybrid possibly between P. triphyllum and Christella parasitica (not Trigonospora ciliata or P. articulatum as hitherto suggested).