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| Registros recuperados: 90 | |
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| Jansen, S.; Lens, F.; Ntore, S.; Piesschaert, F.; Robbrechf, E.; Smets, E.. |
| The secondary xylem of Craterispermeae, Coussareeae, Morindeae s.str., Prismatomerideae, Pauridiantheae, Urophylleae, and Triainolepideae (Rubiaceae, Rubioideae) is described and illustrated in detail. Genera that were previously placed in the Morindeae or Psychotrieae such as Damnacanthus, Lasianthus, Saldinia, and Trichosfachys are also included. Wood anatomical characters are compared with recent phylogenetic insights into the study group on the basis of molecular data. The observations demonstrate that the delimitation and separation of several taxa from the former Coussareeae/Morindeae/Prismatomerideae/Psychotrieae aggregate is supported by wood anatomical data. The Coussareeae can be distinguished from the other Rubioideae by their scanty parenchyma,... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Rubiaceae; Rubioideae; Systematic wood anatomy; 42.58. |
| Ano: 2001 |
URL: http://www.repository.naturalis.nl/record/421859 |
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| Dessein, S.; Robbrecht, E.; Smets, E.. |
| Spermacoce heteromorpha Dessein (Rubiaceae, Spermacoceae) is newly described and illustrated. It grows on the Marungu highlands of the Democratic Republic of the Congo (D.R. Congo) at altitudes of 1800 to 1900 m. The species resembles the Tanzanian Spermacoce taylorii Verdcourt, from which it mainly differs in having terminal inflorescences, only slightly exserted anthers, and densely pubescent stems. Moreover, Spermacoce heteromorpha features marked heterophylly, with long leaves at the plant’s base and much shorter cauline leaves, a type of heterophylly rarely observed in Spermacoce or in the Rubiaceae as a whole. The finding of this species exemplifies the unique floristic richness of this underexplored part of D.R. Congo. |
| Tipo: Article / Letter to the editor |
Palavras-chave: Democratic Republic of the Congo; Heterophylly; Marungu highlands; Rubiaceae; Spermacoce. |
| Ano: 2006 |
URL: http://www.repository.naturalis.nl/record/407334 |
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| Suratman. |
| A study of Gynochthodes from Sumatra is presented. Eight species can be recognized, i.e., G. coriacea, G. jackiana, G. lanuginosa, G. leparensis, G. rigida, G. sublanceolata, G. suratmanii, and G. umbellata. An identification key to the species is provided and detailed descriptions, synonymy, taxonomic notes, and an index to specimen collections of the taxa are given. Natural history notes, including distribution and ecology, vernacular names and uses are also included. |
| Tipo: Article / Letter to the editor |
Palavras-chave: Gynochthodes; Rubiaceae; Sumatra; Taxonomy. |
| Ano: 2018 |
URL: http://www.repository.naturalis.nl/record/644416 |
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| Davis, A.P.; Razafimandimbison, S.G.; Andriambololonera, S.. |
| Five new combinations are made in the genus Bremeria: B. arachnocarpa, B. eriantha, B. scabrella, B. landia var. holosericea, and B. landia var. stadmanii. Bremeria gerrardii is conspecific with Gaertnera phanerophlebia, and thus excluded from Bremeria. Lectotypes are designated for Mussaenda erectiloba var. scabrella, M. stadmanii, and M. trichophlebia. |
| Tipo: Article / Letter to the editor |
Palavras-chave: Bremeria; Gaertnera; Madagascar; Mascarenes; Mussaenda; Nomenclature; Rubiaceae. |
| Ano: 2011 |
URL: http://www.repository.naturalis.nl/record/525988 |
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| Dessein, S.; Vanthournout, S.; Niyongabo, F.. |
| The species Geophila erythrocarpa (Rubiaceae) is described and illustrated. The new species is restricted to dry, dense forests of the Katanga province in D.R.Congo and the adjoining Copperbelt province in Zambia. The species is similar to and in the herbarium easily confused with G. obvallata from which it most clearly differs in having red instead of blue or black fruits. In flowering state, the two species can be separated by differences in calyx morphology. The new species shares the red-coloured fruits with G. afzelii, but differs from this species in the undivided stipules, the fewer-flowered inflorescences with smaller bracts, and details of the leaf coloration. The new species is further compared with all other Geophila species reported from Zambia... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Copperbelt; D.R.Congo; Geophila; IUCN; Katanga; Rubiaceae; Zambia. |
| Ano: 2011 |
URL: http://www.repository.naturalis.nl/record/524943 |
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| Lens, F.; Jansen, S.; Robbrecht, E.; Smets, E.. |
| The Vanguerieae is a tribe consisting of about 500 species ordered in 27 genera. Although this tribe is mainly represented in Africa and Madagascar, Vanguerieae also occur in tropical Asia, Australia, and the isles of the Pacific Ocean. This study gives a detailed wood anatomical description of 34 species of 15 genera based on LM and SEM observations. The secondary xylem is homogeneous throughout the tribe and fits well into the Ixoroideae s.l. on the basis of fibre-tracheids and diffuse to diffuse-in-aggregates axial parenchyma. The Vanguerieae include numerous geofrutices that are characterised by massive woody branched or unbranched underground parts and slightly ramified unbranched aboveground twigs. The underground structures of geofrutices are not... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Vanguereae; Rubiaceae; Systematic wood anatomy; Geofrutex; 42.58. |
| Ano: 2000 |
URL: http://www.repository.naturalis.nl/record/423793 |
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| Lens, F.; Jansen, S.; Huysmans, S.; Robbrecht, E.; Smets, E.. |
| The Vanguerieae is a large tribe of the subfamily Ixoroideae (Rubiaceae) and consists of about 500 species in 27 genera. This study gives a detailed pollen morphological description of 30 species from 16 genera, based on light microscopy and scanning electron microscopy. The Vanguerieae are considered to be stenopalynous, although there is some evidence to question this. First, there is a difference in sexine types that clearly de® nes Keetia and Psydrax ( both reticulate) , and Canthium and Vanguerieae (both perforate with very small perforations) from the other Vanguerieae investigated. Second, pollen grains corroborate the subgeneric delimitations of Canthium sensu Bridson. Pollen morphologically the tribe is characterised by ( 1) the shape of the... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Vanguereae; Ixoroideae; Rubiaceae; Pollen; Morphological variation; Stenopalynous; 42.58. |
| Ano: 2000 |
URL: http://www.repository.naturalis.nl/record/423771 |
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| Dessein, S.; Harwood, R.; Smets, E.; Robbrecht, E.. |
| Complementary to the revision of the genus Spermacoce in the Northern Territory of Australia, pollen morphology of 48 of the 53 native Spermacoce species from the Northern Territory has been investigated by scanning electron and light microscopy. There is considerable variation for most diagnostic pollen characters. The average equatorial diameter (E) ranges from 10.5 to 41.7 μm. Grains are invariably colporate with apertures situated at the equator (being zonocolporate). The number of apertures varies from 3 to 17. The endoaperture is generally an endocingulum, often with a secondary thinning at the ectocolpus; one species has endocolpi. The sexine is usually perforate, but psilate, foveolate, and (micro)reticulate patterns were also found. Supratectal... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Spermacoce; Rubiaceae; Pollen morphology; Palynology; Australia; Northern Territory. |
| Ano: 2005 |
URL: http://www.repository.naturalis.nl/record/407293 |
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| Groeninckx, I.; Janssens, S.; Smets, E.; Verstraete, B.. |
| Astiella is an herbaceous genus endemic to Madagascar, originally described with a single species A. delicatula Jovet. Molecular and morphological evidence place it in the tribe Spermacoceae s. lat. of Rubiaceae. During herbarium studies and fieldwork in Madagascar, 11 new Astiella species were identified and these are described here: A. antongilensis Groeninckx sp. nov., A. antsalovansis Groeninckx sp. nov., A. confusa Groeninckx sp. nov., A. deblockiae Groeninckx sp. nov., A. desseinii Groeninckx sp. nov., A. homolleae Groeninckx sp. nov., A. latifolia Groeninckx sp. nov., A. longifimbria Groeninckx sp. nov., A. perrieri Groeninckx sp. nov., A. pulla Groeninckx sp. nov., and A. tsaratanensis Groeninckx sp. nov. The genus Astiella now holds 12 species in... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Astiella; Endemism; Madagascar; Rubiaceae; Spermacoceae s. lat.. |
| Ano: 2017 |
URL: http://www.repository.naturalis.nl/record/629097 |
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| Davis, A.P.; Bridson, D.M.. |
| A taxonomic revision of Amaracarpus Blume (Rubiaceae, Psychotrieae) is presented. The salient characteristics of Amaracarpus are given, with particular attention to the differences between Amaracarpus, Dolianthus and Psychotria. The taxonomic account includes a key to species, an informal (artificial) subgeneric classification, full descriptions, and a list of specimens examined. Amaracarpus comprises 22 species: six new combinations are proposed, one new species is described, eight species are moved to other genera, the transfer of 12 species to Psychotria is confirmed, and numerous taxa are placed into synonymy. A checklist of all Amaracarpus names is provided. |
| Tipo: Article / Letter to the editor |
Palavras-chave: Amaracarpus; Dolianthus; Psychotria; Psychotrieae; Rubiaceae; New Guinea; South East Asia. |
| Ano: 2004 |
URL: http://www.repository.naturalis.nl/record/524620 |
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| Wittle, P.M.; Davis, A.P.. |
| A taxonomic revision of the Madagascan representatives of the genus Bertiera is presented, to include three species, B. brevithyrsa, B. crinita and B. longithyrsa. A key to their identification is provided, each species is fully described, and summaries of distribution, habitat and ecology, and phenology are given; conservation assessments are also provided. Bertiera brevithyrsa is described as new species; B. crinita represents a new combination, and a lectotype is designated for this name. |
| Tipo: Article / Letter to the editor |
Palavras-chave: Bertiera; Bertiereae; Conservation; IUCN Red List Categories; Madagascar; Rubiaceae. |
| Ano: 2010 |
URL: http://www.repository.naturalis.nl/record/525748 |
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| Registros recuperados: 90 | |
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