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| Registros recuperados: 40 | |
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| Lens, F.; Baas, P.; Jansen, S.; Smets, E.. |
| The wood structure of 71 species representing 24 genera of the pantropical Lecythidaceae s.l., including the edible Brazil nuts (Bertholletia excelsa) and the spectacular cannon-ball tree (Couroupita guianensis), was investigated using light and scanning electron microscopy. This study focused on finding phylogenetically informative characters to help elucidate any obscure evolutionary patterns within the family. The earliest diverging subfamily Napoleonaeoideae has mixed simple/scalariform vessel perforations, scalariform vessel-ray pitting, and high multiseriate rays, all features that are also present in Scytopetaloideae. The wood structure of Napoleonaea is distinct, but its supposed close relative Crateranthus strongly resembles Scytopetaloideae. The... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Ericales; Lecythidaceae s.l.; Lecythidaceae s.s.; Napoleonaeaceae; Scytopetalaceae; Systematic wood anatomy; 42.48. |
| Ano: 2007 |
URL: http://www.repository.naturalis.nl/record/422216 |
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| Welzen, P.C. van; Baas, P.. |
| The leaf anatomy of the Linaceae complex (Linaceae s.s., Hugoniaceae, Ixonanthaceae, Humiriaceae and Erythroxylaceae) and putative allies ( Ctenolophon, Lepidobotrys, Irvingiaceae) is surveyed, mostly on the basis of original observations (72 specimens, 27 genera), partly from data in the literature. Diversity in stomatal type, midrib and petiole vascularisation, sclerenchyma support, foliar sclereids, mucilage cells, secretory cavities, and cristarque cells provide evidence in favour of a separate family status of the members of the Linaceae complex. Allantospermum and Cyrillopsis are best accommodated in the Ixonanthaceae. Irvingiaceae (often treated in or near Simaroubaceae) show similarities with the Linaceae complex, albeit more closely to the... |
| Tipo: Article / Letter to the editor |
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| Ano: 1984 |
URL: http://www.repository.naturalis.nl/record/526014 |
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| Baas, P.. |
| The anatomy of leaf, node, twig, and bark of Ilex, Nemopanthus, Oncotheca, Phelline, and Sphenostemon is described, together with the wood anatomy of the 4 latter genera. Several characters are recorded for the first time. The systematic value of some anatomical characters for judging the wider affinities of the genera involved is discussed. Considering these characters together with macromorphological and palynological data, it is concluded that Phelline and Sphenostemon each merit family status, and have affinities with Aquifoliaceae and Icacinaceae of the Celastrales. Oncotheca shows no affinities with the families of Celastrales, and may possibly have its closest relatives in Theales, but this problem has not been studied in great detail. The leaf... |
| Tipo: Article / Letter to the editor |
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| Ano: 1975 |
URL: http://www.repository.naturalis.nl/record/525243 |
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| Graaff, N.A. van der; Baas, P.. |
| The wood anatomical variation within 17 eurytherm hardwood genera in relation to altitude and latitude has been studied using wood samples from 52 species. With increasing latitude a miniaturization of secondary xylem elements (shorter vessel members, narrower vessels, shorter and sometimes narrower fibres, lower rays) is reported, together with an increase in vessel frequency and frequency and expression of helical thickenings to the vessel walls. Increasing altitude has similar but much weaker effects, and none on vessel grouping or helical thickenings. The number of bars per perforation plate in genera with partly or exclusively scalariform perforations is in general not correlated with altitude or latitude. In the softwood genus Podocarpus tracheid... |
| Tipo: Article / Letter to the editor |
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| Ano: 1974 |
URL: http://www.repository.naturalis.nl/record/525359 |
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| Baas, P.. |
| With over 80 original publications on foliar sclereids, published in the last 30 years, Dr. T. Ananda Rao is a well qualified author for a compendium on the subject. The book consists of a general and a special part. The former includes a historical and methodological introduction, a major chapter on the morphological classification of the various types of sclereids and tracheoids and their distribution patterns, and sections on their taxonomic significance as well as their ontogeny and (presumed) functions. The special part is an ‘abstract review’ of literature records and original observations on 121 families of angiosperms, arranged according to the Takhtajan system. The book is richly illustrated with line drawings as well as numerous halftone plates.... |
| Tipo: Article / Letter to the editor |
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| Ano: 1993 |
URL: http://www.repository.naturalis.nl/record/525546 |
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| Lens, F.; Endress, M.E.; Baas, P.; Jansen, S.; Smets, E.; , D.. |
| This study contributes to our understanding of the phylogenetic signifi cance and major evolutionary trends in the wood of the dogbane family (Apocynaceae), one of the largest and economically most important angiosperm families. Based on LM and SEM observations of 56 Apocynoideae species — representing all currently recognized tribes — and eight Periplocoideae, we found striking differences in vessel grouping patterns (radial multiples vs. large clusters) between the mainly nonclimbing apocynoid tribes (Wrightieae, Malouetieae, Nerieae) and the climbing lineages (remaining Apocynoideae and Periplocoideae). The presence of large vessel clusters in combination with fibers in the ground tissue characterizing the climbing Apocynoideae and Periplocoideae... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Apocynaceae; Apocynoideae; APSA clade; Climbing vs. nonclimbing anatomy; Periplocoideae; Systematic wood anatomy; Tribal classification; 42.58. |
| Ano: 2009 |
URL: http://www.repository.naturalis.nl/record/424670 |
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| Baas, P.. |
| This volume on leaf venation patterns is too modest in its title. Not only the Combretaceae are treated, but not less than eleven other families: Lecythidaceae, Barringtoniaceae, Foetidiaceae, Napoleonaceae, Rhizophoraceae, Anisophylleaceae, Lythraceae, Sonneratiaceae, Oliniaceae, Punicaceae, and Onagraceae. Thus, together with the earlier volumes on Myrtaceae and Melastomataceae plus Memecylaceae, the present book effectively completes the venadon survey of the order Myrtales in its widest possible circumscription. Lecythidaceae and Rhizophoraceae and their satellites do not fit well into the order. Altogether the leaves of 479 species are described and pictured, resulting in a wealth of welcome descriptive information. Criticisms voiced about the earlier... |
| Tipo: Article / Letter to the editor |
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| Ano: 1992 |
URL: http://www.repository.naturalis.nl/record/525478 |
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| Baas, P.. |
| The wood anatomy of 81 species of Ilex is described in detail. The wood anatomical range encountered is presented in a generic description (p. 196). Data on ontogenetic changes in vessel member length and number of bars per perforation are given for three species. The great amount of variation in mainly quantitative but also in some qualitative features is hardly or not related with subgeneric classification but with latitudinal and altitudinal distribution. In both the northern and southern hemisphere and in both the Old and New World, temperate and subtropical species are characterized by conspicuous growth rings, numerous narrow vessels, relatively short vessel members and few bars per perforation plate, conspicuous spiral thickenings on both vessel and... |
| Tipo: Article / Letter to the editor |
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| Ano: 1973 |
URL: http://www.repository.naturalis.nl/record/525232 |
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| Bodegom, S.; Haegens, R.M.A.P.; Heuven, B.J. van; Baas, P.. |
| The leaf anatomical diversity of the genera Baccaurea Lour. (43 species), Distichirhops Haegens (3 species) and Nothobaccaurea Haegens (2 species) (Euphorbiaceae) is described. Two species of Aporosa and three species of Maesobotrya were examined for comparison. The following characters are important for the delimitation of species: hair types, the position of the glandular areas on the leaf margin, the hairiness and size of the glandular areas, the number of epidermal layers, the presence of (mucilage) idioblasts in the epidermis, the presence of palisade parenchyma above the vascular bundles, and the birefringence of the spongy parenchyma cell walls. However, leaf anatomy did not yield characters for distinction between the five genera studied. Phenetic... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Baccaurea; Distichirhops; Maesobotrya; Nothobaccaurea; Euphorbiaceae; Hairs; Leaf anatomy; Leaf glands; Systematics. |
| Ano: 2001 |
URL: http://www.repository.naturalis.nl/record/525184 |
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| Bourdy, G.; Veldkamp, J.F.; Baas, P.; Veldkamp, J.F.; Veldkamp, J.F.; Steenis, C.G.G.J. van; Noteboom, H.P.; Kramer, K.U.; Veldkamp, J.F.; Balgooy, M.M.J. van; Noteboom, H.P.; Noteboom, H.P.; Geesink, R.; Steenis, C.G.G.J. van; Veldkamp, J.F.; boom, H.P. Noote-; Steenis, C.G.G.J. van; Noteboom, H.P.; Steenis, C.G.G.J. van; Steenis, C.G.G.J. van; Noteboom, H.P.. |
| BOURDY, G. Une approche de la médicine traditionnelle à Bukittinggi (Sumatra Quest). D.E.A. d’ecologie U.S.T.L. Montpellier. 1984. 55 pp. The results presented in this paper are based one some field work conducted in the Minangkabau region of Bukittinggi (Western Sumatra) during February and March 1984. Traditional medicine is approached through the description of medicinal plants, the way they are utilized, and the people who gather and prescribe them. Data have been collected while interviewing the ’dukuns’ (native doctors). For each medicinal plant synonyms, vernacular names in Bahasa and Minangkabau are given. Voucher specimens of 69 specimens of such medicinal plants were collected and are deposited at MPU. |
| Tipo: Article / Letter to the editor |
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| Ano: 1985 |
URL: http://www.repository.naturalis.nl/record/533443 |
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| Wilde, W.J.J.O. de; Baas, P.. |
| On October 1st, 1993 Professor Dr. Hermann Otto Sleumer died at the age of 87, after a short illness. His ashes have been interred at Liederbach (near Kirchberg), Germany. Dr. Sleumer had been our colleague at the Rijksherbarium and eminent contributor to Flora Malesiana for many years. He generously shared his vast knowledge and experience with many of us. For younger botanists the many anecdotes and intimate stories he indulged in telling about colleagues he had known, especially from the Englerian circles in Berlin, were always an enriching and entertaining experience. |
| Tipo: Article / Letter to the editor |
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| Ano: 1994 |
URL: http://www.repository.naturalis.nl/record/525765 |
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| Wilde, W.J.J.O. de; Baas, P.. |
| With the death of Andre (‘Dok’) Kostermans, at the age of 88, a truly extraordinary personality has passed away. Dok had bravely borne the inconvenience of an increasing number of ailments associated with high age, such as poor eyesight, and had just recovered from a broken hip when his heart condition (angina pectoris) once more became acute. He passed away on 10 July, 1994 in a hospital in Jakarta where he had been transported one day before from his residence at Pasir Muncang, Gadok, some 15 km out of Bogor. His remains have been interred in the small historical cemetery within the Kebun Raya, by special permission of the Government of Indonesia. Kostermans can be ranked as one of the most important post-war Southeast Asian botanists and was the leading... |
| Tipo: Article / Letter to the editor |
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| Ano: 1995 |
URL: http://www.repository.naturalis.nl/record/525585 |
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| Baas, P.. |
| The hypothesis of functionally adaptive diversification of wood structure in the course of evolution as advanced by Carlquist is critically tested for vessel member length and type of perforation plate. The functional significance of within-tree variation in vessel member morphology is discussed first, and a criticism of Philipson & Butterfield’s theory for explaining classical length-on-age curves for fusiform initial length is given. At the genus and family level examples are cited which contradict the hypothesis that specialization of the perforation plate has a strong selective advantage for the occupation of more xeric environments or for high conductive rates. Other examples, however, seem to support this. The functional interpretation of... |
| Tipo: Article / Letter to the editor |
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| Ano: 1976 |
URL: http://www.repository.naturalis.nl/record/508223 |
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| Baas, P.. |
| The floral and vegetative anatomy of the closely allied guttiferous genera Cratoxylum (Indo-Malesia) and Eliaea (Madagascar) is described. Although the two taxa have many features in common, differences are substantial enough to recognize them as distinct genera, as appears from the following survey: Cratoxylum Ovary with 12 or more ovules Ovary with 3(or 4) incomplete true septa Styles and filaments glabrous Secondary xylem with scarcely pitted fibres Vessels solitary and in radial multiples Silica bodies present in ray cells of wood Eliaea Ovary with 6(—8) ovules Ovary with 6(or 8) incomplete septa, three being true, three false Styles and filaments mostly villous Secondary xylem with densely pitted fibretracheids Vessels almost exclusively solitary... |
| Tipo: Article / Letter to the editor |
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| Ano: 1970 |
URL: http://www.repository.naturalis.nl/record/525720 |
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| Heel, W.A. van; Baas, P.. |
| The intention of this serial of review papers covering the various branches of botany is firstly to offer the authors a freedom to express opinions and to speculate as widely as they dare upon future trends, and secondly to offer the classical- and modern-minded readers at least a possibility to dip into each other’s pages so that each may appreciate the other and learn ‘what it is all about’ (Preston, in the preface to Volume I). The present reviewers are engaged in the field of plant morphology and anatomy, to which the last paper of this volume belongs, namely the excellent contribution by P. B. Tomlinson on Monocotyledons (mainly arborescent forms). Tomlinson presents a lively picture of the ‘habit’, vascularization, inflorescence, etc. in these... |
| Tipo: Article / Letter to the editor |
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| Ano: 1971 |
URL: http://www.repository.naturalis.nl/record/524849 |
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| Vliet, G.J.C.M. van; Baas, P.. |
| The leaf, twig, and nodal anatomy of Alzatea, Axinandra, Crypteronia, Dactylocladus, and Rhynchocalyx is described in detail. This family, as newly delimited by Van Beusekom-Osinga and Van Beusekom, appears to be very heterogeneous, a conclusion supported by the wood anatomical diversity reported in another paper. The nodes may be simply unilacunar, unilacunar with a complete girdling trace, of the common gap (or split lateral) plus median trace type, or trilacunar. Cortical bundles may be present in addition. Further diversity is present in e.g. cuticular texture, stomatal type, hypodermal development, arrangement of vascular bundles in petiole and midrib, mechanical support of the veins, the crystal complement, foliar sclereids, and cork origin.... |
| Tipo: Article / Letter to the editor |
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| Ano: 1975 |
URL: http://www.repository.naturalis.nl/record/524745 |
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| Baas, P.. |
| Original data on leaf crystals and stomatal types in 25 genera of Melastomataceae are presented, and discussed with reference to the classification of the family as modified by Van Vliet et al. (1981, this issue). The heterogeneity of the abolished subfamily Astronioideae is confirmed and a separation of Pternandra from the Astronieae is also justified on the basis of leaf anatomical data. The Astronieae are characterized by large styloids and predominantly anomocytic stomata; this combination of characters also occurs in part of the Melastomatoideae (especially the Miconieae). Most other Melastomatoideae are characterized by polocytic to diacytic stomata and druses. The subfamilies Memecyloideae and Crypteronioideae remain rather heterogeneous leaf... |
| Tipo: Article / Letter to the editor |
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| Ano: 1981 |
URL: http://www.repository.naturalis.nl/record/524994 |
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| Chantarasuwan, B.; Peng, Y.-Q.; Baas, P.; Rasplus, J.-Y.; Heuven, B.-J. van; Welzen, P.C. van. |
| A small fig tree has been misidentified as Ficus orthoneura for a long time. However, morphologically it is distinct from F. orthoneura and F. hookeriana. Typical are the ellipsoid, puberulous receptacle and caducous basal bracts. Leaf anatomy shows a multiple epidermis with the cells in the inner layer much larger than in the outer layer and thus both layers resemble an epidermis with a separate hypodermis. The abaxial cuticle is strongly sculptured, the palisade layer shows some long subdivided cells, and enlarged lithocysts are only present abaxially. Because of these differences we hereby describe it as a new species, named in honour of Cornelis (Cees) Berg: Ficus cornelisiana. |
| Tipo: Article / Letter to the editor |
Palavras-chave: China; Ficus; Moraceae; New species; Vietnam. |
| Ano: 2014 |
URL: http://www.repository.naturalis.nl/record/524854 |
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| Koster, J.; Baas, P.. |
| The leaf anatomy of c. 60 species of the four Asiatic genera of the Myristicaceae (Gymnacranthera, Horsfieldia, Knema and Myristica) is described in detail. Myristicaceae have characteristic, uniseriate hairs, the cells of which have arms. The number of arms per cell and the relative length of the arms are important characters to separate the Asiatic genera. The hairs of Knema can be classified further into different types. Many species of Myristicaceae have a layer of cutinaceous, alveolar material overlying the cuticle proper on the abaxial leaf surface. In angiosperms such a layer was hitherto only reported for Winteraceae. Guard cells are often embedded in the subsidiary cells. The paracytic stomatal complex in Knema and Myristica is sunken and... |
| Tipo: Article / Letter to the editor |
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| Ano: 1981 |
URL: http://www.repository.naturalis.nl/record/525087 |
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| Registros recuperados: 40 | |
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