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| Registros recuperados: 20 | |
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| Sen, U.; Hennipman, E.. |
| The stomata as occurring on the fronds of the sporophytes of a large number of Polypodiaceae s.s. (Filicales) are investigated. A number of different stomatal types is recognised, (newly) described, and their ontogeny investigated. The different types of stomata are discussed in relation to their possible significance for tracing phylogenetic relationships in the Polypodiaceae following a cladistic analysis. |
| Tipo: Article / Letter to the editor |
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| Ano: 1981 |
URL: http://www.repository.naturalis.nl/record/525406 |
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| Hennipman, E.. |
| For practical reasons, some of the results obtained from a systematic revision of the genus Bolbitis (including the species formerly referred to Egenolfia) are published prior to an extensive account on all the species and including full synonymy. The few synonyms added to the taxa listed below generally refer to names nowadays in general use. The types mentioned have been studied. The herbarium abbreviations are those proposed by Lanjouw and Stafleu (1964). I am grateful to Dr. R. C. Bakhuizen van den Brink for the Latin translations of the diagnoses of the new taxa. |
| Tipo: Article / Letter to the editor |
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| Ano: 1970 |
URL: http://www.repository.naturalis.nl/record/524450 |
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| Holttum, R.E.; Hennipman, E.. |
| Rhizome creeping or low-climbing (Bolbitis) or climbing ( Lomariopsis, etc.) or epiphytic (Elaphoglossum), dorsiventral, with a broad ventral vascular strand which supplies the roots and one or more dorsal strands (the fronds in two or more longitudinal rows, according to the number of strands); stipes jointed to rhizome (Teratophyllum, Elaphoglossum) or not, containing several separate vascular strands; scales peltate or pseudopeltate, clathrate or not; no elongate unicellular hairs. Rhizomes of young plants always with one dorsal meristele, this condition persisting to the adult plant in Teratophyllum and many species of Elaphoglossum. Fronds simple ( Elaphoglossum, Bolbitis spp.), pinnate (all but Elaphoglossum) or bipinnate ( Teratophyllum and... |
| Tipo: Article / Letter to the editor |
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| Ano: 1978 |
URL: http://www.repository.naturalis.nl/record/532711 |
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| Hennipman, E.. |
| Professor Holttum’s book on the ferns of Malaya has been regarded a major contribution to the systematics of ferns. It is the result of several decades of active study by an expert botanist. Based on both living and dried material, it goes far beyond that what is generally found in a flora. There is still no general agreement among pteridologists as to the division and status of the major groups, their nomenclature, etc. and the comments Holttum added to most of the larger groups, often implying original ideas, are of particular interest. Besides, detailed ecological information is provided for nearly all the species involved. It is therefore not surprising that after a second printing in 1960, the book became soon out of print again. Another unchanged... |
| Tipo: Article / Letter to the editor |
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| Ano: 1969 |
URL: http://www.repository.naturalis.nl/record/525941 |
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| Hetterscheid, W.L.A.; Hennipman, E.. |
| The present paper deals with a detailed study of the venation, soral shape and distribution, and frondshape of the microsorioid Polypodiaceae, including taxa generally referred to the genera Christiopteris, Colysis, Dendroconche, Dendroglossa, Diblemma, Lecanopteris, Leptochilus, Microsorium, Neocheiropteris, Neolepisorus, Paraleptochilus, Phymatodes, and Podosorus. The fascinating diversity found in the characters studied is used to classify the taxa into 19 groups, which can be arranged into two main groups, using ontogenetic data of the venation. The results suggest that the following genera can be united: Colysis, Dendroglossa, and Paraleptochilus, whereas Dendroconche and Diblemma should be merged with Microsorium. The latter genus is remarkably... |
| Tipo: Article / Letter to the editor |
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| Ano: 1984 |
URL: http://www.repository.naturalis.nl/record/535026 |
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| Hennipman, E.. |
| The identification of some thousands of ferns from New Guinea by the late Dr A. H. G. Alston (1940) resulted in the description of but comparatively few new species. His conclusion, that the fern flora of New Guinea ‘is now fairly well known’ may be right in a general way, but continuous collecting performed after his paper was published proved the existence of many more novelties. One of these is a new species of Todea, a representative of the Osmundaceae, a primitive family of ferns, which dates back to the Palaeozoicum (Hirmer, 1938). A recent study by Hewitson (1962) about the comparative morphology of the living Osmundaceae inspired me to make some remarks on the delimitation of the other recent genera. |
| Tipo: Article / Letter to the editor |
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| Ano: 1968 |
URL: http://www.repository.naturalis.nl/record/526003 |
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| Hennipman, E.. |
| The name Acrostichum acuminatum Willdenow (1810) was designated by Morton (1967) as the basionym of Photinopteris acuminata (Willd.) Morton. As a consequence the generally accepted name Photinopteris speciosa (Bl.) Presl (bas.: Lomaria speciosa Blume, 1828) was sunk by him into synonymy. The diagnosis and the description of Acrostichum acuminatum in the original publication include details of both sterile and fertile leaves. The material that Willdenow had at hand was a specimen of Photinopteris speciosa collected by the Malaspina expedition, labeled ‘Peru’, but obviously originating from the Philippines (Herb. Willdenow no. 19539, B*). The material is sterile; see also Presl (1851:192). The description of the fertile elements was based completely on... |
| Tipo: Article / Letter to the editor |
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| Ano: 1974 |
URL: http://www.repository.naturalis.nl/record/526178 |
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| Hennipman, E.. |
| When revising the acrostichoid genera Bolbitis and Egenolfia from the Old World for my thesis, I came across Acrostichum neglectum F. M. Bail. This species, which was successively transferred to the genera Leptochilus and Campium, has the essential characters of a blechnoid fern. On account of the differences found between A. neglectum and the other blechnoid ferns, it seems necessary to create a new genus to accommodate it, a point of view shared by Prof. Holttum, who gave me valuable advice for this study. I am indebted to Mr L. S. Smith of the Botanic Museum and Herbarium, Brisbane, for the loan of the collections of this species, to Mr J. H. Kern, who kindly helped me with the preparation of the English text, and to Prof. van Steenis for supervising... |
| Tipo: Article / Letter to the editor |
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| Ano: 1966 |
URL: http://www.repository.naturalis.nl/record/524737 |
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| Hennipman, E.. |
| The present study deals with systematic and taxonomic problems in the acrostichoid fern genus Bolbitis (Lomariopsidaceae). The idea came from Prof. Holttum, Kew, in view of his intended revision of the lomariopsidoid ferns for Flora Malesiana. Originally the study was confined to the Asian representatives. However, various problems remained unsolved after the study of these taxa alone, and it was decided to monograph the genus. The taxonomy of the genus Bolbitis was seriously misunderstood in the past—parallel evolution obscuring true relationships—and a rather intricate synonymy has resulted. A brief historical sketch of its taxonomic adventures is worked out. The gross-morphological criteria used for the discrimination of the species by Copeland (who... |
| Tipo: Article / Letter to the editor |
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| Ano: 1977 |
URL: http://www.repository.naturalis.nl/record/508222 |
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| Hennipman, E.; Roos, M.C.. |
| In his introductory statements to 'The Symposium on the Phylogeny and Classification of the Filicopsida' which was held in London, 1972, HOLTTUM, when dealing with 'dubious groups of relationships which would particularly repay investigation', mentioned the Polypodiaceae first (HOLTTUM, 1973: 6). Talking about Polypodiaceae the present authors deal with the Polypodiaceae sensu stricto only, thus excluding the Cheiropleuriaceae, Dipteridaceae, Grammitidaceae, and also the Loxogrammaceae, taxa which were formerly (or are still) included in the Polypodiaceae sensu lato. As delineated in this way, this almost exclusively pantropical family consists of about 600 species and an indefinite number of genera. |
| Tipo: Article / Letter to the editor |
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| Ano: 1983 |
URL: http://www.repository.naturalis.nl/record/534714 |
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| Hennipman, E.. |
| Since the foundation of the Rijksherbarium, pteridophytes have been an important part of the total collections. Blume, the first director, had a special interest in ferns. In 1826, when he returned to Europe from his stay in Java, he took with him large collections of well preserved pteridophytes which he had gathered there himself. These, together with the fern collections of Van Hasselt, Kuhl (both from Java), and Zippel (Java, Moluccas, New Guinea), were all deposited in the Rijksherbarium. Blume’s studies on the ferns of Java, both in the wild and in the herbarium, were published before the foundation of the Rijksherbarium in the second fascicle of the ‘Enumeratio Plantarum Javae et insularum adjacentium minus cognitarum vel novarum’ (1828) in which... |
| Tipo: Article / Letter to the editor |
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| Ano: 1979 |
URL: http://www.repository.naturalis.nl/record/524937 |
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| Hennipman, E.. |
| During a collecting trip to Thailand, as a member of the Thai-Dutch botanical expedition 1965/1966, I was struck by the excessive amount of mucilage sometimes present on the circinnate fronds of several leptosporangiate ferns. This was especially evident in representatives of the monotypic fern family Plagiogyriaceae and the Thelypteroid ferns. The mucilage is secreted by a multitude of minute glandular hairs. In mature leaves the hairs are shrivelled and easily overlooked, or even have disappeared. Moreover, usually only herbarium specimens are available for investigation. |
| Tipo: Article / Letter to the editor |
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| Ano: 1968 |
URL: http://www.repository.naturalis.nl/record/525195 |
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| Registros recuperados: 20 | |
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