Search results for "Peristome"
showing 6 items of 6 documents
Orthotrichum karoo (Orthotrichaceae), a new species with hyaline-awned leaves from southwestern Africa
2009
A new Orthotrichum species, 0. karoo, is described. The moss has a gametophyte similar to that of 0. diaphanum, from which it mainly differs in its peristome lacking exostome teeth. It is known from three localities in western South Africa, and from one more in southern Namibia. In all these localities it was found growing on shrubs and trees, rarely on rocks, in succulent karoo and related types of vegetation.
Two new species ofUlota(Orthotrichaceae, Bryopsida) with multicellular spores, from the Hengduan Mountains, Southwestern China
2011
Two new species, Ulota yunnanensis and Ulota gigantospora, are described from Yunnan and Sichuan Provinces, China. Both have multicellular spores, a relatively uncommon character in the genus. Differences between the species include growth form and habit, leaf areolation, capsule shape, peristome structure and ornamentation, operculum shape and colour, as well as vaginula and calyptra hairiness. These characters and those discriminating the new species from other ones with similar spore type are discussed and illustrated.
New Ulota species with multicellular spores from southern South America
2012
Abstract Two new Ulota species with multicellular spores, Ulota billbuckii and U. streptodon, are described from southern Chile. The new species are usually found growing together and sometimes forming mixed cushions or mats on different trees, with a preference for Nothofagus betuloides and N. antarctica. The new Ulotae are easily differentiated from each other as well as from other Ulota species with multicellular spores by a set of sporophytic traits including two very uncommon peristome configurations. In this paper, both species are described, and the differences between them as well as from other Ulotae with similar endosporic germination, and from superficially similar species, is di…
Ulota larrainii (Orthotrichoideae, Orthotrichaceae, Bryophyta) a new species from Chile, with comments on the worldwide diversification of the genus
2015
A new species of Ulota D. Mohr, U. larrainii, is described from the Aysén Region, southern Chile. The characters that discriminate the new moss are the prostrate habit, leaves not crisped, marginal cells of the leaf base differentiated in 1(2) rows, vaginula hairy, exostome of 8 pairs of orange, recurved teeth, endostome of 16 broad and hyaline segments, and large, multicellular spores. The new moss is illustrated and compared with similar taxa. In addition, the presence of multicellular spores in the genus Ulota is summarized and evaluated from an updated list of currently accepted species. Finally, the distribution, species richness and levels of endemism in the different regions where Ul…
Orthotrichum mazimpakanum sp. nov. and O. anodon (Orthotrichaceae), two similar species from California
2011
Abstract Studies of herbarium samples and field surveys in Southern California during the fall of 2008 led to the discovery of several new collections of mosses lacking exostome teeth belonging to Orthotrichum Hedw. subgenus Pulchella (Schimp.) Vitt. Some of them are ascribable to O. anodon F. Lara, Garilleti & Mazimpaka even though they display a set of characters not noticed before, considerably broadening the morphological variability of this species and making necessary an updated description. Other materials, from scattered localities along a wide latitudinal range, correspond to a here described new species, Orthotrichum mazimpakanum Garilleti & F. Lara, differentiated by a set of una…
Orthotrichum Norrisii (Orthotrichaceae), A New Epiphytic Californian Moss
2008
Abstract A new Orthotrichum species, O. norrisii, is described from California. The new taxon is recognized by a unique combination of sporophytic characters: capsule narrowly cylindrical and not contracted below mouth when dry, exothecial bands narrow and formed by 2(–3) cell rows, peristome with eight pairs of exostome teeth and eight endostome segments, stomata cryptopore and located in the lower part of the urn, lid plane and rostrate and vaginula hairy. Widely distributed throughout California, the new taxon has been overlooked and confused with O. tenellum.