163 research outputs found
Kubitzki, K. (Editor). — The Families and Genera of Vascular Plants. Volume 1. Pteridophytes and Gymnosperms. Edited by K.U. Kramer and P. S. Green. Springer-Verlag, Berlin, 1990
No full textBourlière François. Kubitzki, K. (Editor). — The Families and Genera of Vascular Plants. Volume 1. Pteridophytes and Gymnosperms. Edited by K.U. Kramer and P. S. Green. Springer-Verlag, Berlin, 1990. In: Revue d'Écologie (La Terre et La Vie), tome 46, n°2, 1991. p. 184
The Lindsaeoid ferns of the Old World III. Notes on Lindsaea and Sphenomeris in the Flora Malesiana Area
No full textIn the Flora Malesiana area recent authors have distinguished the following genera in the Lindsaea group of ferns: Isoloma J. Smith, Lindsaea Dryander (often misspelled “Lindsaya”; see Copeland 1947, p. 53, and Kramer 1957a, p. 156), Odontosoria Fee, Protolindsaya Copeland, Schizoloma Gaudichaud (or Schizolegnia Alston), Sphenomeris Maxon, Tapeinidium (Presl) C. Christensen, and Xyropteris Kramer. In my account of the American species (Kramer 1957a) I included the Asiatic genus Schizolepton Fee in the Lindsaea group, on Copeland’s authority, without sufficiently looking into the matter. Holttum (1958) has shown since that its affinities are with Syngramma and has subsequently (1960) combined it with Taenitis, although Pichi-Sermolli (1966) denies any close affinity of the two last-named genera.
As stated before (Kramer 1957a, 1967) I am convinced that Schizoloma cannot be maintained as a distinct genus and prefer to treat it as a section of Lindsaea. With regard to Isoloma I have reached the same conclusion, as explained below. Odontosoria sensu stricto does not occur in Asia. Xyropteris is still monotypical, as originally described (Kramer 1957b), and Tapeinidium, including Protolindsaya, as correctly stated by Christensen (1934), forms the subject of a separate paper (Kramer 1968). The notes in the present paper can thus be restricted to Lindsaea and Sphenomeris
A new genus of Lindsaeoid ferns
No full textIn revising the New World representatives of the genus Lindsaea, the author came across a fern specimen from Borneo preserved in the Rijksherbarium, Leiden, that did not seem to fit into any described genus. It had been described as Schizoloma stortii v. A. v. R., but in the author’s opinion the genus Schizoloma Gaud., typified by Lindsaea ensifolia Sw., cannot be maintained (Kramer, 1957). Almost all species that in modern works have been left in it (e.g. HOLTTUM, 1954; ALSTON, 1956, as Schizolegnia) should be put back in Lindsaea. This, however, cannot be done with Sch. stortii, as this species possesses a peculiar combination of characters unlike anything found in Lindsaea. Its pinnae have a median main vein as in L. ensifolia, but are freeveined, and they have a large basal acroscopic auricle as in Isoloma, but are non-articulate. There is a remote resemblance to Lindsaea walkerae Hook., which may be its closest relative, as stipulated by van ALDERWEREKT van ROSENBURGH in his original description; the natural place of that species too would perhaps be in a separate genus. Sch. stortii differs from it, a.o., by its pale axes and alternate auriculate pinnae. Because of its apparently rather isolated position, it seems indicated to create a separate genus for this fern.
Xyropteris Kramer, genus novum. — Ex affinitate Lindsaeae et Isolomae, exstat petiolo rhachideque pallida, pinnis alternis exarticulatis praeter auriculam basalim acroscopicam aequilateralibus, venis liberis, soris continuis. (Name derived from Greek ξνρόν, razor-blade)
Notes on the Distribution of the Pteridophytes of Suriname
No full textIn a forthcoming publication (Kramer, in prep.) floristic and taxonomic data of the pteridophyte flora of Suriname will be assembled, with keys and notes on their local distribution and ecological preference. The present paper deals with the geographical distribution of Suriname pteridophytes beyond the boundaries of Suriname (Fig. 2), a subject that lies beyond the scope of a local fern Flora.
In the past, some (but relatively not very many) authors of fern Floras included a paragraph on the distribution of the taxa (Posthumus, 1928; Christensen, 1932; Backer & Posthumus, 1939). In some other fern Floras some space is devoted to ecology, but very little to geography (Holttum, 1954). In still others, considerations of a general kind on ecology and geography are altogether lacking (Vareschi, 1969). Lyell (1870), in his rather little-known book on the distribution of ferns, tried to bring together all the data known at his time; his work is now, of course, almost exclusively of historical significance
The Lindsaeoid ferns of the Old World V. The smaller Pacific islands
No full textThe present paper is the third regional revision of the Old World Lindsaeoid ferns. The second (the fourth in the entire series on the Old World Lindsaeoids) will be published as vol. II, 1 part 3 of Flora Malesiana; it is awaiting publication as the present paper goes to the press. Species fully described there and extending into the area covered by the present revision are not dealt with at length again, in order to avoid redundance.
The present treatment deals with the species of Micronesia, Melanesia, and Polynesia, or, more precisely, the smaller Pacific Islands from the Palau Islands, the Marianas, and the Bismarck Archipelago in the West to Hawaii and the Marquesas in the East. The Volcano and Bonin Islands wil be treated with Japan, to which country they were recently returned; the Admiralty Islands are included in Flora Malesiana; New Zealand will be dealt with together with Australia; New Caledonia was the subject of a separate publication (Kramer 1967); no Lindsaeoid ferns have so far been found on the Tuamotus, Pitcairn, Easter Island, and other islands in the extreme East of Polynesia, nor on any atoll islands
The Lindsaeoid ferns of the Old World II. A revision of Tapeinidium
No full textTapeinidium is the second largest of the Lindsaeoid fern genera. In the present study 17 species are distinguished. Until Tapeinidium was recognized as a genus its species were included in Microlepia, where it was originally described as an infrageneric division, or in Davallia. Fée (1852), then Diels (1902), treated it as a genus, but under the incorrectly interpreted name Wibelia Bernhardi, which is actually a synonym of Davallia (see Copeland, 1947).
The species described so far have mainly been distinguished by their leaf architecture, especially the degree of dissection; see, e.g., van Alderwerelt van Rosenburgh (1909). In my opinion this is at best one of several useful characters. At least equally important is the structure of the petiole and the other axes of the lamina, a character diat proved to be very valuable for diagnostic purposes in the neotropical Lindsaea species (Kramer, 1957a) but is much less serviceable in the paleotropical ones. In some cases the rhizome scales are also distinctive. These characters have been grossly neglected in the past, and the species distinguished by most authors are generally far too widely circumscribed. Diels (l.c.), for example, listed three species at a time when more than twice as many were known. Accordingly there proved to be a surprisingly large number of undescribed species, viz. 8 out of the 17 recognized here, some of them represented by numerous specimens in many herbaria and collected long ago but never recognized, e.g., T. novoguineense and T. melanesicum. This contrasts sharply with the situation in Lindsaea in the same region where the number of new species is comparatively very small and relatively many more species have to be placed in synonymy
A New Species of Doryopteris from Surinam
No full textIn the course of examination of specimens in the fern collection of the Botanisch Museum en Herbarium, Utrecht, the senior author discovered a specimen of Doryopteris that seemed to be different from any species treated in the junior author’s revision of the genus. Further examination has proved this to be the case and it is here described as new.
DORYOPTERIS conformis, spec. nov
Flore d'Afrique centrale – Pteridophyta - Lindsaeaceae
No full textPDF version of treatment of Lindsaeaceae in Flore d'Afrique centrale serie
The Lindsaeoid ferns of the Old World. I. New Caledonia
No full textThe present paper is the first of a series of regional revisions of the Old World Lindsaeoid ferns centering around a revision of the group in the Flora Malesiana area where the largest number of species occurs. In the few cases where modern revisions are already available the present author’s contribution will be limited to critical and additional notes; otherwise they will be in the nature of monographic treatments, although widespread species will, of course, as a rule not be described more than once.
The botanically isolated position of New Caledonia is well-known, and most floristic phytogeographers agree in regarding it as a separate floristic region (e.g. Good, 1947; Van Balgooy, 1960). Endemism is high in the ferns as well as in the flowering plants, although the number of endemic fern genera is very small (Brownlie, 1965). In the absence of a comprehensive modern fern flora I am unable to quote any reliable figures. The last paper dealing with the New Caledonian fern flora as a whole by Fournier (1873) is nearly 100 years old. Later contributions were made notably by Copeland (1929b), Christensen (in: Däniker, 1932), and Guillaumin (1962- 1964). Christ (1910), on the basis of Fournier’s (1873) data, reported 259 species, 86 endemic, but stated that Fournier’s species concept was apparently too narrow (p. 234), which I can confirm for the Lindsaea group, as shown by the synonymy in the present paper. On the other hand, additional species have been found or distinguished since. A more important factor limiting our knowledge of endemism in the New Caledonian ferns (and other plants) is, I think, the poor state of knowledge of the Melanesian flora, particularly of the Solomon Islands. The exploration that is now in progress in this archipelago may be expected to furnish important additional data
Notes on the Pteridophytes on the Dutch West Indies
No full textThe present paper is intended as an introduction to the author’s treatment of the ferns and fern allies in Mr. A. L. STOFFERS’ new Flora of the Netherlands Antilles, the first volume to be published shortly. Apart from phytogeographical notes that do not usually find a place in such a flora, in the following some nomenclatural notes are given, besides a few explanatory remarks on the principles employed in the classification
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