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| Registros recuperados: 61 | |
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| Berg, C.C.. |
| Arbor 25-30 m alta. Ramuli foliosi hispidi, hispiduli, vel scabri. Lamina fere ad petiolum 15-partita; segmenta oblanceolata, 7-25 cm longa, 2-4.5 cm lata, plerumque obtusa, pagina superiore scabridula, inferiore arachnoideo-tomentosa, ad venas albo-puberula vel -hirtella; venae secundariae circ. 20—40-jugae, maxime 0.5 cm inter se remotae; petiolus arachnoideo-tomentellus atque etiam hirtellus, sed basi apiceque hirsutus vel hispidus; pulvinus pilis brunneis pluricellularibus, longioribus albis unicellularibus, obsitus. Inflorescentiae pistillatae pedunculo 6-7 cm longo; spicae 4, 8-9 cm longae. Tree up to 25-30 m tall. Leafy twigs hispid to hispidulous to scabreus by mainly uncinate hairs of different length. Leaves subrotundate to broadly ovate, 15 (or... |
| Tipo: Article / Letter to the editor |
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| Ano: 1972 |
URL: http://www.repository.naturalis.nl/record/534700 |
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| Berg, C.C.. |
| Arbor terrestris. Ramuli foliosi circa 1 cm diam., subglabri. Lamina oblanceolata vel subobovata, 10-28 cm longa, 3,5-9 cm lata, brevissime acuminate, basi (sub)acuta, faciebus subglabris; vennae laterales 10-16 pro latere; petiolus 1-1,5 (-2,5) cm longus; stipulae 1,5-4 cm longae, (sub)persistentes, subglabrae. Syconia axillaria bina, (sub)glabra, circa 2 cm diam. |
| Tipo: Article / Letter to the editor |
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| Ano: 1981 |
URL: http://www.repository.naturalis.nl/record/534964 |
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| Berg, C.C.. |
| Arbor. Folia elliptica-lanceolata, 5.5-17.5 cm longa, 3.5-6 cm lata, coriacea vel subcoriacea, acuta-acuminata vel obtusa, subglabra; costa supra haud impressa; paria venarum secundariarum cum costa angulos acutos efformantia; venae tertiariae nonnullae, parallelae. Inflorescendae hermaphroditae ovoideae, floribus staminatis circ. 50 plus minusve aggregatis ad basem receptaculi, perianthiis circ. 2 mm altis, trifidis, staminibus 3, pistillodio perianthium haud vel vix superante; flores pistillati stigmatibus circ. 2 cm longis, sparse pilosis. Infructescentia globosa, pilos sat crebros uncinatos et flores masculos persistentes sparsos sed parte basali receptaculi plus minusve aggregatos gerens. Trees (up to 12 m tall); latex white. Leafy twigs 1-2.5 mm... |
| Tipo: Article / Letter to the editor |
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| Ano: 1972 |
URL: http://www.repository.naturalis.nl/record/535094 |
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| Berg, C.C.. |
| The problem of the correct position of the Conocepbaloideae, a subfamily of the Moraceae in Engler's system, but transferred to the Urticaceae by Corner (1962), can be satisfactorily solved by assigning the rank of family to this taxon, to be named Cecropiaceae. Diagnoses of and a key to the six genera constituting this family (Cecropia, Coussapoa, Musanga, Myrianthus, Poikilospermum, and Pourouma) are given. The classification of the Urticales and the relationship between the Cecropiaceae and both Moraceae and Urticaceae are discussed. A key to the families of the Urticales is given. |
| Tipo: Article / Letter to the editor |
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| Ano: 1978 |
URL: http://www.repository.naturalis.nl/record/534846 |
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| Berg, C.C.. |
| In material of Cardamine pratensis from many localities in the Netherlands, the following somatic chromosome numbers were counted: 28, 30, 31, 32, 34, 36, 38, 39, 45, 46, 52, 53, 54, 56, 58, 59, 60, 62, 64, 64 à 66, 67, 68, 69, 70, 72, 73, 74, 75, 76, 78, (80), 84, and (118) 1). Many numbers were due to intra-individual deviation of the normal number. As main groups tetraploids with 28-32, octoploids with 56-64, and decaploids with 70-80 chromosomes could be distinguished; the normal numbers of the ploidy levels were 30, 60, and 74-76, respectively. Two subspecies could be distinguished on the basis of morphological, ecological, and cytological characters. |
| Tipo: Article / Letter to the editor |
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| Ano: 1967 |
URL: http://www.repository.naturalis.nl/record/535188 |
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| Berg, C.C.; Segal, S.. |
| Cardamine pratensis L. in the Netherlands 242 specimens of the Cardamine pratensis aggregate from 58 Dutch localities were morphologically and cytologically studied. Two forms could be distinguished, viz. a form with usually lower chromosome numbers (2n = 28—32, rarely up to 52), and another with higher chromosome numbers (2n = 56—84), which, judging by the criteria applied by LÖVKVIST (12), correspond with C. pratensis sensu stricto and C. palustris (Wimm. & Grab.) Peterm. respectively. The frequent occurrence of ‘transitional’ forms and of specimens which are difficult to place, in conjunction with a number of cytological, genetical, and geographical arguments, make the present authors feel that, chiefly for practical reasons, it is preferable to... |
| Tipo: Article / Letter to the editor |
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| Ano: 1966 |
URL: http://www.repository.naturalis.nl/record/528144 |
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| Registros recuperados: 61 | |
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