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| Registros recuperados: 40 | |
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| Baas, P.; Kool, R.. |
| The leaf anatomy of all 33 species of Heisteria is described, based on a study of 143 specimens. There is a considerable amount of diversity in stomatal type (anisocytic, anomocytic, cyclocytic, laterocytic or paracytic), in occurrence and type of mesophyll sclereids, and of fibre bundles along the leaf margin. Outline and thickness of anticlinal epidermal cell walls, cuticle thickness, crystal complement, and stomatal size also vary, but often below the species level. The leaf anatomical diversity can be used for recognising 8 groups of varying distinctness in Heisteria. H. asplundii and H. skutchii with laterocytic stomata, and H. pentandra and H. scandens with paracytic stomata constitute the two most distinct infrageneric groups; the other six groups... |
| Tipo: Article / Letter to the editor |
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| Ano: 1983 |
URL: http://www.repository.naturalis.nl/record/524600 |
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| Lens, F.; Endress, M.E.; Baas, P.; Jansen, S.; Smets, E.. |
| Wood anatomical studies in the economically important Apocynaceae or dogbane family are fragmentary. This study represents a first attempt to unravel the phylogenetic signifi cance and major evolutionary trends in the wood of the family, using existing and new microscopic wood observations within the large subfamily Rauvolfi oideae. On the basis of LM and SEM observations of 91 species representing all 10 currently recognized tribes, we found that most of the tribes are characterized by a unique combination of wood characters, such as vessel grouping, vessel element length, fi ber type, frequency of uniseriate rays, and fused multiseriate rays. Climbing rauvolfi oid taxa can generally be distinguished from erect species by their wider vessels, tendency to... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Apocynaceae; APSA clade; Climbing vs. nonclimbing habit; Rauvolfi oideae; Systematic wood anatomy; Tribal classification; 42.58. |
| Ano: 2008 |
URL: http://www.repository.naturalis.nl/record/424647 |
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| Keßler, P.J.A.; Baas, P.. |
| During the last three years the Rijksherbarium/Hortus Botanicus (L) has been involved in the Tropenbos Kalimantan Programme, a co-operative programme between AFRD (Agency of Forest Research and Development, Indonesian Ministry of Forestry) and the ‘Tropenbos’ Foundation. The implementation of this programme is executed by AFRD and its institutes on the Indonesian side and the IBG-DLO (Instituut voor Bosbouw en Groenbeheer – Dienst Landbouwkundig Onderzoek), Wageningen, and L on the Dutch side. UNESCO-MAB has funded research in soil science. The programme is supported by the forestry state enterprises Inhutani I and II, and other concessionaires. A close co-operation exists with the Faculty of Forestry of the Mulawarman University, Samarinda. The research... |
| Tipo: Article / Letter to the editor |
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| Ano: 1993 |
URL: http://www.repository.naturalis.nl/record/533041 |
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| Lens, F.; Kårehed, J.; Baas, P.; Jansen, S.; Rabaey, D.; Huysmans, S.; Hamann, T.; Smets, E.. |
| Wood samples from 53 species belonging to 41 genera of the Icacinaceae s.l. are investigated using light and scanning electron microscopy. The traditionally circumscribed Icacinaceae fall apart into four segregate families that are clearly nested within asterids, i.e., Icacinaceae s.str. (near or in Garryales), Cardiopteridaceae and Stemonuraceae (both Aquifoliales), and Pennantiaceae (Apiales). From a wood anatomical point of view, these families cannot easily be distinguished from each other. However, some features such as vessel distribution, perforation plate morphology, size and arrangement of vessel pits, fibre wall thickness, and the occurrence of cambial variants can be used to assign various species to one of the four families. The wood structure... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Cambial variants; Comparative wood anatomy; Garryales; Icacinaceae; LM; Oncotheca; SEM; 42.58. |
| Ano: 2008 |
URL: http://www.repository.naturalis.nl/record/424648 |
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| Lens, F.; Schönenberger, J.; Baas, P.; Jansen, S.; Smets, E.. |
| The systematic significance of wood anatomical characters within Ericales is evaluated using separate and combined parsimony analyses including 23 wood characters and 3945 informative molecular characters. Analyses of wood features alone result in poorly resolved and conflicting topologies. However, when pedomorphic character states are coded as inapplicable, the combined bootstrap topology results in an increase of resolution and support at most deeper nodes compared with the molecular analyses. This suggests that phylogenetic information from the limited number of morphological characters is not completely swamped by an overwhelming amount of molecular data. Based on the morphology of vessels and fibers, and the distribution of axial parenchyma, two... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Anatomy; Phylogeny; Ericales; 42.48. |
| Ano: 2007 |
URL: http://www.repository.naturalis.nl/record/422235 |
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| Baas, P.. |
| Vegetative anatomy, fruit and seed structure, and pollen morphology of Hua and Afrostyrax (tropical West and Central Africa) are described in detail. The two genera have many anatomical characters in common (see anatomical family diagnosis on p. 182) but are sufficiently different from other families to justify the existence of the family Huaceae. Some characteristic features are discussed and the results of comparisons with representatives of about 50 families are reported. Afrostyrax is not related to Styracaceae, nor is Hua to Erythroxylaceae as had been suggested in the past. Sterculiaceae and Bombacaceae appear to have the highest number of characters in common with Huaceae of all the families compared. This supports the inclusion of Huaceae in the... |
| Tipo: Article / Letter to the editor |
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| Ano: 1972 |
URL: http://www.repository.naturalis.nl/record/525390 |
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| Baas, P.. |
| The leaf and twig anatomy of Berberidopsis and Streptothamnus are described in detail. The two genera are very similar in most aspects of their vegetative anatomy and together take a very isolated position in the Flacourtiaceae on account of their xylem anatomy and stomatal type. Differences in indumentum, crystal complement and epidermal cell morphology (whether or not papillate) support the distinction of Streptothamnus moorei from Berberidopsis sensu Veldkamp, i.e., including Berberidopsis corallina and B. beckleri (formerly Streptothamnus beckleri). |
| Tipo: Article / Letter to the editor |
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| Ano: 1984 |
URL: http://www.repository.naturalis.nl/record/525788 |
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| Baas, P.; Bolton, A.J.; Catling, D.M.. |
| This book contains the proceedings of the Anglo-Dutch wood anatomy meeting organized by the Materials Section of the Royal Microscopical Society at Oxford and Kew from 5th to 8th April 1976. In fact, it contains more than just the written record of the papers delivered during the meeting. The largely original studies of most authors have been presented here as comprehensive publications which contain much more information than could have been conveyed during the lectures. The wood anatomists contributing to this issue represent a diversity of specializations, this would seem to justify the somewhat pretentious title: ‘Wood Structure in Biological and Technological Research’. It is hoped that this book will help to bridge the gap between students of wood... |
| Tipo: Article / Letter to the editor |
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| Ano: 1976 |
URL: http://www.repository.naturalis.nl/record/508239 |
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| Van Sam, Hoang; Baas, P.; Keßler, P.J.A.. |
| This paper surveys the medicinal plants and their traditional use by local people in Ben En National Park, Vietnam. A total of 230 medicinal plant species (belonging to 200 genera and 84 families) is used by local people for treatment of 68 different diseases. These include species that are collected in the wild (65%) as well as species grown in home gardens. Leaves, stems and roots are most commonly used either fresh or dried or by decocting the dried parts in water. Women are mainly responsible for health care, they have better knowledge of medicinal plants than men, and also collect them more than men at almost every age level. The indigenous knowledge of traditional medicinal plants may be rapidly lost because 43% of the young generation do not know or... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Ben En National Park; Traditional medicinal plants; Disease treatment; Conservation. |
| Ano: 2008 |
URL: http://www.repository.naturalis.nl/record/525136 |
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| Jansen, W.T.; Baas, P.. |
| The leaf anatomy of Kokoona and Lophopetalum is described in detail. Separation of the two genera as effectuated by Hou (1963) is supported by differences in vascular anatomy of the distal end of the petiole, which is invariably more complex in Lophopetalum than in Kokoona. Other differential characters (p. ooo) only apply to part of the species of Lophopetalum. As based on leaf anatomy it is impossible to define groups of closely related species within the genera because of a lack of mutual correlation between the different leaf anatomical characters. Lophopetalum in particular shows some striking anatomical features such as a very variable and complex arrangement of vascular tissue in petiole and midrib, complex types of cyclocytic and anisocytic... |
| Tipo: Article / Letter to the editor |
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| Ano: 1973 |
URL: http://www.repository.naturalis.nl/record/525610 |
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| Baas, P.. |
| This is the fifth volume in the series of reference books on the anatomy of the Monocotyledons edited by the former Keeper of the Jodrell Laboratory at Kew, Dr. C. R. Metcalfe. It is the second volume of which he is both the author and the editor, his first contribution being volume I on the Gramineae. The book starts with an introductory part with notes on techniques and materials, general considerations on morphology and anatomy of the family, and a discussion of the taxonomic implications of the anatomical findings. The bulk consists of descriptions of leaf, culm, rhizome, and root anatomy of 280 species from 90 genera. For each genus data from literature have been abstracted in a special section by Miss Mary Gregory. Taxonomic notes are also given for... |
| Tipo: Article / Letter to the editor |
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| Ano: 1971 |
URL: http://www.repository.naturalis.nl/record/525269 |
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| Baas, P.. |
| IAWA Bulletin, New Series. Quarterly periodical of the International Association of Wood Anatomists. Annual subscriptions Dfl. 40.00 (Dfl. 30.00 for personal members of IAWA). Volume 1, 1980. From its foundation in 1931 the International Association of Wood Anatomists has promoted international contacts through the publication of News Letters, which were later transformed into a News Bulletin, also containing review articles. From 1970 onwards a more pretentious IAWA Bulletin made its appearance, which not only aimed at publishing notes, requests and review articles, but also original scientific publications. The latter category increased in relative importance, and forced the editors to change from the large, yet rather unprofessional magazin size to that... |
| Tipo: Article / Letter to the editor |
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| Ano: 1980 |
URL: http://www.repository.naturalis.nl/record/533274 |
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| Registros recuperados: 40 | |
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