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| Registros recuperados: 12 | |
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| Sipman, H.J.M.; Tan, B.C.. |
| Vegetation descriptions of Mount Kinabalu (4101 m), the highest mountain in tropical Asia between the Himalayas and New Guinea, have resulted in different, conflicting zonations. Some stress more on floristic affinities, others more on physiognomy. A lowland zone reaching to about 1000 m is usually distinguished. The next 2000 m comprising the mountain forests are treated in many different ways. A summit zone (above 3800 m) is recognized rather often (cf. Stapf, 1895; Gibbs, 1914; Meijer, 1963; Van Steenis, 1964; Menzel, 1988). In our opinion the most convincing is the zonation proposed by Van Steenis, who stressed the floristic composition. This comprises three zones: 1. the foothill zone below 1000 m; 2. the montane zone from 1000 to 2500 m; 3. the... |
| Tipo: Article / Letter to the editor |
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| Ano: 1990 |
URL: http://www.repository.naturalis.nl/record/532982 |
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| Sipman, H.J.M.. |
| A morphological, chemical, and ecological analysis was performed on a large number of collections of Cladonia pyxidata and related taxa from the Netherlands. The following species are recognized: Cladonia fimbriata. Cl. conistea, Cl. conista. Cl. pyxidata. Cl. chlorophaea. Cl. cryplochlorophaea. Cl. merochhrophaea and Cl. grayi. A strain with novochlorophaeic acid is described as a new variety: Cl. merochlrophaea Asah. var. novochlorophaea (colour reactions: P -> orange-red or often negative; K -> negative; C -> negative or yellow; KC -> negative). In morphological and ecological respect a close relationship has been found between 1. Cladonia conistea and Cl. conista, and 2. Cladonia cryplochlorophaea and Cl. merochlorophaea. For comparison... |
| Tipo: Article / Letter to the editor |
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| Ano: 1973 |
URL: http://www.repository.naturalis.nl/record/534851 |
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| Sipman, H.J.M.. |
| The Colombian representatives of the lichen family Parmeliaceae with linear lobes and marginal cilia have been revised. A key is given and morphology, chemistry and distribution are treated of 12 species in three genera: Cetrariastrum Sipm. gen. nov, with C. andense (Kärnef.) Sipm. comb. nov., C. dubitans Sipm. spec. nov. and C. equadoriense (Sant.) Sipm. comb. nov., Everniastrum with E. catawbiense (Degel.) Hale, E. cirrhatum (Fr.) Hale, E. columbiense (Zahlbr.) Hale, E. fragile Sipm. spec. nov., E. planum Sipm. spec. nov., E. sorocheilum (Vain.) Hale and E. vexans (Zahlbr.) Hale, and Parmelina cleefii Sipm. spec. nov. and P. swinscowii (Hale) Hale. |
| Tipo: Article / Letter to the editor |
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| Ano: 1980 |
URL: http://www.repository.naturalis.nl/record/534835 |
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| Brand, A.M.; Sipman, H.J.M.. |
| Eight Stereocaulon (Lichenes) species have been found in the Netherlands. Of these S. paschale (L.) Fr. and S. tomentosum Fr. have been observed only in the last century, in heather and woodland on sand. S. condensatum Hoffm. is found on old drifted sands in the interior, where it occurs now and is not rare locally. S. saxatile occurs on the same sites but is not common. The other, epilitic species were discovered in this century. S. dactylophyllum Flk. and S. evolutum Graewe grow on a few erratic boulders. S. pileatum Ach. and S. vesuvianum Pers. have been found several times recently, on artificial substrates. S. condensatum of the sands shows a somewhat aberrant form; the primary phyllocladia are usually less flattened, and often develop into branched... |
| Tipo: Article / Letter to the editor |
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| Ano: 1978 |
URL: http://www.repository.naturalis.nl/record/535002 |
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| Barendregt, A.; Dries, P.J.L. van den; Sipman, H.J.M.. |
| The well-known and widespread lichen species Cladonia furcata (Huds.) Schrad. is usually very constant in its chemistry: fumarprotocetraric acid is its main secondary metabolite, sometimes accompanied by atranorin. Recently a new chemical strain, characterised by the presence of psoromic acid instead of fumarprotocetraric acid or atranorin, was found in Portugal by the first two authors during phytosociological investigations of heath vegetations. The plants are preserved in the herbarium of the Institute of Systematic Botany, University of Utrecht (U), leg. Barendregt & v.d. Dries nr. 1-2 (U). Morphologically the plants with psoromic acid represent the slender form of C. furcata. which is the predominant form in lowland western Europe (fig. 1). The... |
| Tipo: Article / Letter to the editor |
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| Ano: 1982 |
URL: http://www.repository.naturalis.nl/record/534898 |
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| Gradstein, S.R.; Sipman, H.J.M.. |
| Campylopus introflexus (Hedw.) Brid. sensu lato comprises two widespread, closely related species: tropical and warm-temperate C. pilifer Brid. (= C. polytrichoides DeNot.) and temperate southern hemispheric C. introflexus (Hedw.) Brid., which was recently introduced in Europe. Main differences are in the height of the dorsal lamellae of the leaves, in spore size and in seta length. In C. pilifer lamellae are more pronounced in tropical mountains than in lowland areas. An extreme form with lamellae up to seven cells high is C. pilifer var. lamellatus (Mont.) comb. nov. from Bolivia. |
| Tipo: Article / Letter to the editor |
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| Ano: 1978 |
URL: http://www.repository.naturalis.nl/record/535057 |
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| Masselink, A.K.; Sipman, H.J.M.. |
| Some interesting records of lichens belonging to the genus Cladonia Wigg. are reported. Cladonia cariosa (Ach.) Spreng. and C. fragilissima Østh. & P. James have recently been found for the first time in the Netherlands. C. symphycarpa (Ach.) Fr., hitherto only collected once, has been discovered on a second locality. Short descriptions and comments on the ecology and geographical distribution of these species are given, and tables of phytosociological relevé’s are provided, as well as some drawings of the plant material collected. |
| Tipo: Article / Letter to the editor |
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| Ano: 1985 |
URL: http://www.repository.naturalis.nl/record/526826 |
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| Brand, A.M.; Sipman, H.J.M.. |
| Eight Stereocaulon (Lichenes) species have been found in the Netherlands. Of these S. paschale (L.) Fr. and S. tomentosum Fr. have been observed only in the last century, in heather and woodland on sand. S. condensatum Hoffm. is found on old drifted sands in the interior, where it occurs now and is not rare locally. S. saxatile occurs on the same sites but is not common. The other, epilitic species were discovered in this century. S. dactylophyllum Flk. and S. evolutum Graewe grow on a few erratic boulders. S. pileatum Ach. and S. vesuvianum Pers. have been found several times recently, on artificial substrates. S. condensatum of the sands shows a somewhat aberrant form: the primary phyllocladia are usually less flattened, and often develop into branched... |
| Tipo: Article / Letter to the editor |
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| Ano: 1978 |
URL: http://www.repository.naturalis.nl/record/527995 |
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| Sipman, H.J.M.. |
| The taxonomy of the family Megaloeporaceae (Lecanorales, lichenised ascomycetes) has been revised basing on an examination of morphology, anatomy and chemistry of thallus and apothecia, and of apothecium ontogeny. The Megalosporaceae are mainly characterised by features of the apothecium ontogeny, by thallus- and apothecium-chemistry, and by a range of spore types. Three genera have been distinguished within this family, Austroblastenia (gen. nov.) with two species, occuring in Australia and New Zealand, Megaloblastenia (gen. nov.) with two species, occuring in Australia, New Zealand and southern South America, and Megalospora, with twenty-five species, concentrated in Australasia, but with representatives throughout the tropical and warmtemperate zones of... |
| Tipo: Article / Letter to the editor |
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| Ano: 1983 |
URL: http://www.repository.naturalis.nl/record/534845 |
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| Daniëls, F.J.A.; Sipman, H.J.M.; Hansen, E.S.. |
| Twelve species of terricolous microlichens from the Angmagssalik District, Southeast Greenland, are reported: Caloplaca friesii, C. livida, Lecanora boligera, Lecidea oligotropha and Leciophysma arctophila, which are new to the lichen flora of Greenland, Rinodina conradi, which is new to the eastcoast, and Baeomyces roseus, B. rufus, Buellia geophila, B. punctata, Caloplaca tornoensis and Mycoblastus tornoensis, new to Southeast Greenland. In a discussion of the greenlandic distribution, unpublished records from the herbarium of Copenhagen (C) are incorporated. Notes on the habitats are given and the pertinent phytosociological units indicated. Some morphological and anatomical characters are commented upon briefly. |
| Tipo: Article / Letter to the editor |
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| Ano: 1983 |
URL: http://www.repository.naturalis.nl/record/535272 |
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| Registros recuperados: 12 | |
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