Showing papers in "Blumea in 1982"

Pentastemona, a new 5-merous genus of Monocotyledons from North Sumatra (Stemonaceae)

Abstract: A new, short-stemmed genus with two species is described in the Stemonaceae. It has regular, 5- merous flowers, obviously the first among the Monocots. The four genera of the family are discussed and their characters contrasted. The fruit and seed of Stichoneuron are for the first time described. Attention is called for the peculiar aril in the four genera. It is concluded that the family is a natural one, in vegetative characters and seed structure, and should not be split up. A new family description is given and an artificial key to the genera. Some observations on anatomical features were checked or established, especially concerning the crystals, by Dr. P. Baas. A concise account of the palynology of the four genera is given by Dr. J. Muller. Besides the new type species, Pentastemona sumatrana. , there is one new combination for the second species, P. egregia (basionym Cryptocoryne egregia Schott).

A taxonomic revision of Harpullia (Sapindaceae)

Abstract: The present taxonomic revision of Harpullia was started by the second author as the main part of her work for a M. Sc. in biology at Leiden University. She concentrated on a revision of the species occurring in New Guinea, paid only a more superficial attention to the rest of the genus. The first author supervised her work, completed it, and worked it up for publication. It is hoped that this taxonomic revision will be followed by two more papers, one on the pollen-morphology by Dr. J. Muller, secondly one on the systematics of the genus by the first author of the present paper. The system that will probably emanate from the last named paper is already used in the present one and, accordingly, will be sketched here. The genus is, as with Radlkofer (1933-1934), divided into two subgenera, namely a supposedly more primitive one, Otonychium, with only two species, H. pendula (1) and H. arborea (2), and the other one, Harpullia, with the further 24 species. Contrary to Radlkofer, however, we refrained from a further subdivision into sections, but grouped the species of the latter subgenus in a more informal way. The first rather loose group of supposedly relatively primitive species encompasses H. austro-caledonica (3), H. giganteacapsula (4), H. longipetala (5), and H. species nova (26). Next comes a mainly Australian group of species characterized by winged petioles and leaf rachises, viz. H. frutescens (6), H. alata (7), H. rhyticarpa (8), and probably the New Guinea H. rhachiptera (9). The likewise Australian species H. hillii (10) seems to take a position in between some groups, as explained in the note under that species. Included in the third group are H. cupanioides (11), H. vaga (12), H. crustacea (13), H. camptoneura (14), and H. hirsuta (15). To the fourth group belong three New Guinea species characterized by deeply lobed fruits, viz. H. leptococca (16), H. carrii (17), and H. oococca (18). The fifth and last group, considered to be the most derived one, is characterized by rami- or cauliflory. This group encompasses 6 or 7 mutually closely allied species, viz. H. solomonensis (19), H. ramiflora (20), H. myrmecophila (21), H. cauliflora (22), H. petiolaris (23), H. largifolia (24), and probably H. peekeliana (25).

Additions to the genus Kania (Myrtaceae) in Malesia with notes on Cloezia

Abstract: The genus Kania Schltr. is defined and its relationship with Metrosideros Banks ex Gaertn. and Cloezia Brongniart et Gris (= Mooria Montr.) is clarified. Two new combinations are made: Kania urdanetensis (basionym Photinia urdanetensis Elmer, transferred from Cloezia) and K. microphylla (basionym Tristania microphylla Quisumbing et Merrill). The known range of Kania is extended to the Philippines and Cloezia is now considered to be restricted to New Caledonia.

A discussion of the Ehrharteae (Gramineae) with special reference to the Malesian taxa formerly included in Microlaena

Abstract: The genera Microlaena R. Br., Petriella Zotov, and Tetrarrhena R. Br. are included in Ehrharta Thunb. (Gramineae-Ehrharteae), which necessitates four new combinations in the latter. In Malesia Ehrharta is represented by two taxa originally included in Microlaena: E. diplax F. v. Muel. var. giulianettii (Stapf) L. P. M. Willemse (M. giulianettii Stapf) and E. stipoides Labill. var. stipoides [M. stipoides (Labill.) R. Br. var. stipoides]. Descriptions of and notes on these taxa are given.

A revision of Badusa (Rubiaceae, Condamineae, Portlandiinae)

Abstract: The genus Badusa is transferred from the Cinchoneae to the Condamineae subtribe Portlandiinae: it is closely related to Morierina. A new species B. palawanensis is described from Palawan, and a new subspecies from Biak, B. corymbifera ssp. biakensis.

Agrostis (Gramineae) in Malesia and Taiwan

Abstract: In Malesia and Taiwan there are 6 species of Agrostis Linne (Gramineae). Agrostis rigidula Steud. has 8 varieties, 5 in Malesia and 4 (incl. one Malesian) in Taiwan. Agrostis clavata Trin. is native in Taiwan and once found in New Guinea. Agrostis gigantea Roth must be called A. stolonifera Linne var. ramosa (S. F. Gray) Veldk. and is partly native, partly introduced in Malesia. Agrostis hirta Veldk. is a new species from New Guinea. New combinations for varieties are proposed in A. rigidula and the Indian A. pilosula Trin.

A revision of Sericolea Schlechter (Elaeocarpaceae)

Abstract: Sericolea is a genus endemic to New Guinea. The relevant literature is surveyed. Descriptions are given of all species and keys provided to the 15 species and all infraspecific taxa accepted. Two species are described as new: S. coodei and S. microphylla. A new subspecies of S. brassii A. C. Sm. is recognized: ssp. carrii. S. arfakensis Gibbs, S. gracilis (Laut.) Schltr., and S. novoguineensis Gibbs reduced by Coode in a recent paper are reinstated and S. glabra Schltr.. also reduced by Coode, is recognized as a variety of S. micans Schltr. Three new varieties are distinguished in S. gaultheria (F. v. M.) Schltr. and one in S. novoguineensis Gibbs.

Morphology of the gynoecium in Labiatae

Abstract: Two gynoecial primordia are initiated as discrete units but soon get interconnected by the occurrence of interprimordial growth between them. A rim of meristematic tissue thus produced gives rise to the ovary wall by zonal growth. The residual floral apex grows parallel to the gynoecial primordia in the form of a septum. The two placental ridges arise from the inner lateral walls of the ovary, grow into the ovarian cavity, and ultimately fuse with the axial septum. The anterio- posterior region of the ovary wall also grows into the ovarian cavity to form a false septum which divides each locule into two. The Labiatae show a placentation which is neither true axile nor true parietal but an intermediate condition between the two, as the septum grows like in a typical axile placentation and the placentae like in typical parietal placentation. The gynobase in Labiatae is considered to be carpellary in nature.

A revision of the Malesian species op Palmeria (Monimiaceae—Monimieae)

Abstract: Twelve species are recognized of which five (P. womersleyi, P. brassii, P. hooglandii, P. schoddei. and P. clemensae) are described as new. Nine species are reduced to synonymy (P. warburgii, P. puberula, P. myriantha, P. paniculata, P. parvifolia, P. acuminata, P. habbamensis, P. pulchra and P. dallmannensis). All twelve species occur in New Guinea, only one (P. arfakiana) extending westwards into Sulawesi. P. incana, P. gracilis and P. hypargyrea may also occur in Queensland in addition to the three species already described from Australia.

Note on the structure of developing seeds of Knema and Horsfieldia (Myristicaceae)

Abstract: The structure of the seed is based on the massive development of the ovule immediately above the insertion of the outer integument. This may be called endochalazal development, as suggested by F. Bouman (Pers. comm.).

Critical notes on New Guinea plants described by A. Gilli

Abstract: Two new genera and nineteen new species of Dicotyledons from Papua New Guinea collected and described by A. Gilli (1980) have been examined by specialists. These families are Begoniaceae, Cruciferae, Elaeocarpaceae, Euphorbiaceae, Hypericaceae, Leguminosae, Rosaceae, Rubiaceae, Saxifragaceae, and Sterculiaceae. Both new genera are reduced: Melachone to Amaracarpus (Rub.), Disaster to Commersonia (Sterc.). Supposed new generic records to Malesia proved erroneous: a new Thelygonum belongs to Nertera (Rub.), and a Trochiscus to Nasturtium (Cruc.); the Viburnum from Papua is a Psychotria (Rub.). All species are reduced to those already known. It is advocated as undesirable to describe novelties from odd tropical plant collections.

Comparative leaf anatomy of Trigonobalanus Forman (Fagaceae)

Abstract: The leaf anatomy of the recently discovered Neotropical species Trigonobalanus excelsa is described and compared with that of the Old World species T. doichangensis and T. verticillata. Trigonobalanus excelsa appears to be very similar in its leaf anatomy to T. verticillata from Borneo and Sumatra.

Spathichlamys — A remarkable Rubiacea

Abstract: Spathichlamys, a quite remarkable genus of the Rondeletieae is only known from the type collection from Burma. In fruit it could easily be mistaken for Wendlandia, but it differs from this genus in the flattened ovate stipules. The flowering material is most interesting, the anthers are contained within the long corolla tube which later splits and rolls open to expose the anthers. As far as is known this character of splitting of the corolla tube has only been reported elsewhere in the Rubiaceae in the African genus Dorothea Wernh. (Gardenieae); the splitting of the corolla is the main character separating it from the closely allied Aulacocalyx, in which genus it is currently placed in most recent works. However, in Dorothea, the style apparently curves away from the corolla through the slit, the corolla maintaining its normal form and not rolling back to any degree.

A synopsis of Matthaea (Monimiaceae)

Abstract: Revision of the genus which centres in the Philippines; precursor to treatment in Flora Malesiana. There is a key to the species but no descriptions. Six species are accepted, 2 names are reduced for the first time, 1 name is excluded, 1 is imperfectly known. Difference with the allied genus Steganthera is discussed.

Erechthitoid taxa of Senecio (Compositae) in New Guinea and Indonesia

Abstract: A new species of erechthitoid Senecio is described, Senecio brassii Belcher, and a key to the four species of erechthitoid Senecio recognised in the East Indies is given.