Showing papers in "Blumea in 1995"

Revision of Philippine Medinilla (Melastomataceae)

Abstract: The Philippine species of Medinilla (Melastomataceae) are revised and a total of eighty species are recognized for the Philippine archipelago, one of the centres of diversity of Medinilla. The species exhibit a wide array of forms and highly localized geographic distributions. A systematic study of herbarium specimens revealed the existence of twelve species groups. A key to the species groups and species within each group, descriptions, illustrations, and habitat information are provided. The segregate genera Carionia, Cephalomedinilla, and Hypenanthe are treated here as congeneric with Medinilla. One new species, M. palawanensis, is described. Three new combinations and several reductions, neotypifications, and lectotypifications are proposed.

Revision of the Southeast Asian genus Stelechocarpus (Annonaceae)

Abstract: In the present article a revision is given of the Southeast Asian genus Stelechocarpus, in which two species are recognized and described.

Type collections of nongeniculate Corallinales (Rhodophyta) in the Rijksherbarium (L), Leiden University, The Netherlands

Abstract: An analysis of collections of nongeniculate Corallinales (Rhodophyta) in the Onderzoekinstituut Rijksherbarium/Hortus Botanicus, Rijksuniversiteit Te Leiden (abbreviated L) has revealed the presence of type material for 114 species and infraspecific taxa. These include 35 holotypes, 21 lectotypes, 1 neotype, 15 isotypes, 25 isolectotypes, 12 syntypes and 4 paratypes. Type material of 25 authors is represented and includes taxa described by F.T. Kutzing, M.H. Foslie, F.R. Kjellman, R.A. Philippi, F. Hauck, and F. Heydrich. Lectotypes have been newly designated for Lithophyllum crassum, L. crispatum, Lithothamnion macquariensis, and L. mamillosum. For each taxon, information on the protologue, nature of the type material, type locality, references to typification and published illustrations and pertinent nomenclatural and other comments are provided.

Leaf anatomy of Harpullia, Majidea, and Conchopetalum (Sapindaceae)

Abstract: The leaf anatomical characters of Harpullia and the related genera Majidea and Conchopetalum are described in detail. Harpullia and Majidea both have stellate hair tufts together with solitary unicellular hairs, in Conchopetalum stellate hair tufts are absent. A high variability below the species level is reported for several leaf epidermal characters. Other leaf anatomical characters such as the hypodermis, sclerification of the bundle sheath extensions, and the presence of secretory idioblasts and idioblastic sclereids also show a considerable variation. Characters with a higher diagnostic value within Harpullia are the type of stomata and in certain species the presence of idioblastic sclereids in the mesophyll. Based on leaf anatomy the subgenus Otonychium within Harpullia can be distinguished by the cyclocytic stomatal type and absence of secretory idioblasts. The subgenus Harpullia is characterized by the paracytic stomatal type, which has not been recorded elsewhere within the Sapindaceae. A subdivision of the subgenus Harpullia cannot be made, because of an obvious lack of mutual correlation between the different leaf anatomical characters.

The genus Pothos L. (Araceae-Pothoeae) in New Guinea, Solomon Islands and Australia

Abstract: The genus Pothos L. is revised for the Australasian region. Twelve species are recognised. Pothos albertisii Engl, and P. quinquevenosus Alderw. are reduced to the synonymy of P. papuanus Becc. ex Engl.; P. brevispatha Ridl. and P. ledermannii Engl. & K. Krause are reduced to the synonymy of P. versteegii Engl.; P. elegans Engl. is reduced to the synonymy of P. zippelii Schott, and P. brownii Domin is reduced to the synonymy of P. longipes Schott. No new names are proposed. Illustrations are provided for previously unillustrated species. Aspects of morphology, architecture, and infrageneric and suprageneric relationships are briefly discussed.

Revision of Magodendron (Sapotaceae) with observations on floral development and morphology

Abstract: The genus Magodendron Vink is revised. A second species, M. mennyae, is described. In the developing flower the staminodes are initiated when the stamens are already distinctly differentiated into filament and anther. The probability of movements of the staminodes during anthesis is discussed. In the youngest stages observed the pistil is a single, apically open locule; the sept primordia on its wall are free from the pistil base. The septs grow towards the centre of the pistil. The concrescence of the septs is imperfect, resulting in open connections between the ovarial locules and towards the stigma.

Census of Myristica (Myristicaceae) in New Guinea anno 1994

Abstract: In this paper an account is given of all names in the genus Myristica Gronov. for New Guinea, including 71 new species, subspecies or varieties and 4 new names either by new combination or new rank. Sinclair (1968) accepted 40 species names with 7 varieties, Foreman (1974, 1978) admitted 45 names (38 species and 8 varieties). In the present census I have 95 species and 31 taxa of infraspecific rank, reflecting a more refined species definition as well as the intensified field collecting of the last decades. A key is given, based on male and female flowering and fruiting specimens.

A taxonomic revision of Pseudodracontium (Araceae-Aroideae-Thomsonieae)

Abstract: The Indochinese genus Pseudodracontium N.E. Br. (Araceae) is revised. Seven species are recognized; a key is given. Four new species from Vietnam and Thailand are described: P. fallax, P. kuznetsovii, P. lanceolatum, and P. latifolium. Distributions of all the species are mapped. Pseudodracontium macrophyllum Gagnep. ex Serebryanyi is validly published here for the first time. Two taxa are reduced to synonymy: P. anomalum N.E. Br. is reduced to P. lacourii; P. flotoi S.Y. Hu is reduced to P. harmandii. Three species (P. kerrii, P. laoticum, and P. siamense) invalidly published by Gagnepain are mentioned under the species to which they actually belong. Ecological and taxonomic notes are provided.

New and noteworthy Malesian species of Loranthaceae

Abstract: Ten new or noteworthy Malesian species of Loranthaceae are discussed. The known area of the relictual Cecarria obtusifolia (Merrill) Barlow is increased to include Flores and Timor. Dendrophthoe curvata (Blume) Miquel is accepted as a distinct species. The status of Dendrophthoe falcata (L. f.) Ettingsh. is discussed, and the species is excluded from the Malesian flora. Dendrophthoe gangliiformis Barlow is described as a new species from Celebes, Alor and Tanimbar. A new combination, Dendrophthoe kerrii (Craib) Barlow, is made for the mainland Asian taxon Loranthus kerrii Craib. Dendrophthoe x rimituba Barlow is described as a new nothospecies endemic to Sumatra. A new combination, Dendrophthoe timorana (Danser) Barlow, is made for a species previously placed in the genus Amyema. Loranthus odoratus Wallich is recorded from Sumatra as a new genus and species for Malesia. Macrosolen brevitubus Barlow is described as a new species endemic to Borneo. The identity of Macrosolen melintangensis (Korthals) Miquel, a widespread species in western Malesia, is established. Trithecanthera sparsa Barlow is described as a new species endemic to Borneo.

Taxonomy and phylogeny of the Euphorbiaceae tribe Erismantheae G.L. Webster (Erismanthus, Moultonianthus, and Syndyophyllum)

Abstract: The Erismantheae (monoecious, leaves opposite, stipules interpetiolar) contain three genera, Moultonianthus (monotypic), and Erismanthus and Syndyophyllum, each with 2 species. Moultonianthus is recognized by its persistent, large, cordate stipules; Erismanthus is characterized by the catkin-like staminate inflorescences with very long-pedicelled flowers; and characteristic for Syndyophyllum are the inflorescences with both staminate flowers (in bundles) and pistillate flowers (one per bundle of staminate flowers). Both varieties of Syndyophyllum occidentale are now considered to be distinctive species, because an additional difference was found (one axillary bud of each leaf pair present halfway along the petiole or not). The phylogenetic analysis of the Erismantheae, in comparison with two other tribes in the subfamily Acalyphoideae, the Chaetocarpeae and the Cheiloseae, shows that the Erismantheae are a very distinct, monophyletic group. Within the Erismantheae, Erismanthus and Syndyophyllum are closest related; all three genera are monophyletic.

The identity of Sperlingia Vahl (Asclepiadaceae)

Abstract: Sperlingia Vahl (Asclepiadaceae) is a synonym of Hoya R.Br. sect. Hoya (Asclepiadaceae). Its two species are identical. The lectotype, S. verticillata Vahl, is the basionym of H. verticillata (Vahl) G. Don, the correct name for Hoya parasitica (Roxb.) Wall, ex Wight.

A synopsis of taxonomic changes in Aporosa Blume (Euphorbiaceae)

Abstract: Some major nomenclatural and taxonomic changes in Aporosa Blume are treated, i.e., the spelling of the genus name, some new combinations, and descriptions of four new species of from West Malesia, six from New Guinea, and two new varieties from West Malesia. Notes on a number of often misunderstood species are also included.

A taxonomic revision of the Malesian genus Trigonopleura Hook.f. (Euphorbiaceae)

Abstract: Trigonopleura, a genus from W Malesia, has three species, the widespread T. malayana (Malay Peninsula, Sumatra, Borneo, Sulawesi) and the two endemic species T. dubia (Philippines) and T. macrocarpa (Sarawak, Kuching). The species differ slightly from each other in leaf size, colour, and margin, flower and fruit size, fruit wall thickness, and aril size. A phylogenetic analysis was not performed, but it is argued that both endemic species split off separately from T. malayana. Trigonopleura is probably related to Chaetocarpus, in particular to C. castanocarpus. Probably, Chaetocarpus is a paraphyletic group of species and will be monophylitic when united with Trigonopleura, but this will need thorough phylogenetic research. Here, both genera are kept separate, because they are very distinct (see Table 1). Typical for Trigonopleura are the fruits (wrinkled when dry, tomentose), the seeds (arillate), the inflorescences (axillary clusters of flowers), and the flowers (sepals imbricate, petals present, valvate, disc lobed, an androphore, 3 locules with one ovule each).

The taxonomic significance of leaf flavonoids in West Malaysian Dicranopteris taxa (Gleicheniaceae)

Abstract: A survey of leaf flavonoids in Dicranopteris curranii, D. pubigera and some varieties of D. linearis have shown that major flavonoids are flavonols and flavones with glycosidic combination at the 4’-, 3- and/or 7-positions. It is remarkable that each species and each variety of D. linearis is distinguished by at least one different flavonol or flavone.

Morphology and evolution of Arytera pollen (Sapindaceae-Cupanieae)

Abstract: A description of Arytera pollen based on light and scanning electron microscopic observations is presented. Four aperture types and two ornamentation types (one divided into two subtypes) can be distinguished. The commonest aperture types are colporate and parasyncolporate; each of the other two types occurs in a single species. The main ornamentation types are rugulate and striate-rugulate; the latter has small or large lumina. Polymorphism occurs in both characters in several species. A cladistic analysis of Arytera shows two distinct evolutionary trends in the pollen: 1) aperture system from parasyncolporate to colporate, and 2) ornamentation from striate-rugulate with small lumina to striate-rugulate with large lumina. The plesiomorphic state of the character ornamentation remains uncertain. The result obtained contributes to the doubt whether primitively colporate pollen occurs within the subfamily Sapindoideae. In contrast to the general view of evolution in Sapindaceae pollen, the aperture system of Arytera pollen did not appear to be more conservative than the ornamentation. The evolutionary changes in the aperture system and ornamentation do not ‘coincide’, which suggests them to be functionally relatively independent.

A synopsis of Dryadorchis Schltr. (Orchidaceae)

Abstract: Contrary to published descriptions, the poorly known New Guinea genus Dryadorchis Schltr. neither has a footless column, nor an immobile labellum. The merger of Dryadorchis with Thrixspermum Lour., as proposed by Clements, Wallace, and Jones, is not justified. Chamaeanthus singularis J.J. Sm. and Sarcochilus huliorum Schuit. are transferred to Dryadorchis. A key to the four known species is given.

Baharuia, a new genus of Apocynaceae from Malesia

Abstract: Baharuia, a new genus in the Apocynaceae, subfamily Apocynoideae is described. There is one species, B. gracilis, collected from Borneo and Sumatra.

A revision of Papuechites (Apocynaceae)

Abstract: In the present article the genus Papuechites Markgraf (Apocynaceae) is revised. One species is recognised, Papuechites aambe (Warb.) Markgr.

Two new species of Alyxia (Apocynaceae: Plumerioideae) from Thailand

Abstract: Alyxia reinwardtii Blume affinis sed corollae alabastro acuminato, inflorescentia lanato, corollae lobis longioribus. Ab Alyxia pisiformis Pierre ex Pitard differt inflorescentia lanato, corollae tubo longiore et lobis longioribus. — Typus: Maxwell 74-804 (holo AAU; iso L), Thailand,Nakhon Nayok Prov., Khoa Yai National Park, Khao Kieo, 1000 m, 12 Aug. 1974. Forest climber. Stems puberulent when young, older glabrous. Leaves IN WHORLS OF