10 research outputs found
Hypolytrum (Cyperaceae): taxonomic and nomenclatural notes, geographical distribution and conservation status of Neotropical species
Studies in Cyperaceae-Mapanieae VI-VIII
It is to be hoped, that the genus Pandanophyllum Hassk. never will revive, for it is based on a bad generic description and two nomina nuda, P. palustre Hassk. (Harassas tjaai) and P. humile Hassk., the first of which is supposed to indicate Mapania palustris (Steud.) Vill., while the other name has brought about much confusion, as it has been used for Hypolytrum humile (Steud.) Boeck. as well as for Mapania humilis (Miq., partly) Vill.
The first validly published description of Pandanophyllum humile Hassk. nomen nudum in Cat. Pl. Hort. Bot. Bog. 1844, p. 297 has been given by Steudel in his Synopsis II (1855), p. 134 and is based upon a specimen collected in Java by Zollinger (n. 1511, Brit. Mus., Paris), belonging to the genus Hypolytrum. So this is the type-specimen of H. humile (Steud.) Boeck. in Linnaea XXXVII (1871â1873), p. 128. Bentham and Hooker, however, accepting the interpretation of Kurz in Journ. As. Soc. of Bengal XXXVIII, part 2 (1869), p. 82 and the revised opinion of Miquel in his Ill. Fl. Arch. Ind. (1871), p. 61, included both species in their section Pandanophyllum of Mapania (Gen. Pl. III, 1883, p. 1056). A quarter of a century later C. B. Clarke divided Benth. and Hookerâs section into two subgenera, viz. Pandanophyllum, including Mapania humilis Vill. and Halostemma (Wall.), including Mapania palustris (Steud.) Vill. Consequently our present section Pandanophyllum sensu Clarke probably excludes both species, which originally belonged to it. One might be inclined to rectify the mistake by changing the name of Halostemma into Pandanophyllum and coining a new name for the other subgenus, but the principal difficulty, caused by the ambiguity of Hasskarlâs generic description can not be solved in this manner. This description calls for a bifid style (perhaps referring to Hypolytrum humile Boeck.) and 3â5 spikelets (not appropriate to Mapania palustris Vill., highly improbable as to Mapania humilis Vill. and Hypolytrum humile Boeck.). The only way out of the difficulty is to reject the name Pandanophyllum as a nomen dubium in the sense of the rules of nomenclature (art. 63) and to rename the subgenus Pandanophyllum Benth. et Hook., sensu Clarke. I propose the name Pandanoscirpus
A New Mapania ( Cyperaceae ) from the Malay Peninsula
Volume: 10Start Page: 182End Page: 18
Paramapania, genus Novum asiaticum Cyperacearum
Genera Mapania, Hypolytrum, Thoracostachyum valde cognata sunt. Quamvis enim adhuc diversa sit botanicorum sententia de structura florum huius tribus morphologice interpretanda, de hac re omnes consentiunt, squamellas laterales binas generis Hypolytri, sive sepala sive glumas floriferas vocandas, squamellis exterioribus Mapaniae et Thoracostachyi homologas esse. F. Pax solum, qui cum nonnullis aliis auctoribus Thoracostachyum cum Mapania iungendo systema Benthamianum et Hookerianum secutus est, tertium genus, cui solo flores bisexuales ascribit, longe disiunxit. Conspectus generum usitatus ut in Hook. f., Fl. Brit. Ind. VI, p. 586, ubi C. B. Clarke Cyperaceas disposuit, ita fert: A. Spicula capitata .............................. Mapania B. Spicula corymboso-paniculata. 1. Stylus bifidus ...................... Hypolytrum. 2. Stylus trifidus ................. Thoracostachyum.
Hic conspectus autem numero specierum cognitarum sensim augente quibusdam vitiis laborare apparet. Corymbos a capitibus diiudicare non semper facile. Discrimen a numero styli ramorum sumptum incertum, quia in eodem genere sicut in Scirpo et in Carice, quin etiam in eadem specie, saepe mutari cernitur. Praeterea speciebus spicula singula praeditis nullum genus hospitium praebere videtur
Cyperaceae do Parque Estadual Paulo CĂ©sar Vinha, Guarapari, EspĂrito Santo, Brasil Cyperaceae of the Paulo CĂ©sar Vinha State Park, Guarapari, EspĂrito Santo, Brazil
Este trabalho consiste no levantamento dos representantes de Cyperaceae da restinga do Parque Estadual Paulo CĂ©sar Vinha, Guarapari, Brasil. A famĂlia estĂĄ representada no local por 38 espĂ©cies. SĂŁo apresentadas descriçÔes, ilustraçÔes, chaves de identificação e comentĂĄrios para todos os tĂĄxons.<br>In this paper are presented 38 species of Cyperaceae, ocorring in the "restinga" vegetation of the Paulo CĂ©sar Vinha State Park, Guarapari, Brazil. Descriptions, illustrations, comments and keys to identification are presented