On the bryogeography of Western Melanesian Lejeuneaceae : with comments on their epiphyllous occurrence

The phytogeography of Western Melanesian (Papua New Guinea, West Irian and the Solomon Islands) Lejeuneaceae was studied on the basis of previous literature and the Huon Peninsula material from the Koponen-Norris expedition. The largest portion of the Lejeuneaceae belong to Western Melanesian and Malaysian endemics. The number of Western Melanesian endemic Lejeuneaceae (20.5 %) is, however, somewhat lower than generally in hepatics (38.2 %). This is apparently due to the large number of epiphyllous taxa in the Lejeuneaceae, a group especially widespread in lowland rainforests

Bibliographic Summary of Arkansas Field Botany

Over 750 references, compiled over the past five years, are presented on floristics, taxonomy, autecology, synecology, species biology, habitat analysis, impact analysis, paleoenvironment, phytogeography, and history of field botany in Arkansas. This bibliography is reported to facilitate efforts to document and interpret the flora, the vegetation, and the natural heritage of Arkansas and to encourage others to participate in that collective effort

Distribution, Abundance, Status, and Phytogeography of Log Ferns (Dryopteris: Woodsiaceae) in Arkansas

A study of the distribution, abundance, status, and phytogeography of the six taxa of Log Ferns {Dryopteris: Woodsiaceae) that are known to occur in Arkansas was conducted from 1981 -1986. Five of these ferns are generally quite rare in Arkansas. Except for D. marginalis, all exist in Arkansas as small, peripheral populations that are marginal, outlier populations to the west and south or west and north of their metropolis. Two sterile, triploid hybrid taxa (D. X australls and D. X leedsii each occur at only one locality, and there with but one of their parent taxa. The population of the putatively sterile hybrid D. Xaustralis has a large number of juvenile plants that were not asexually produced byrhizome expansion. The microhabitat of D. Xaustralls is suggested to favor gametophyte establishment. It is speculated that some level of pseudomeiotic spore production and/or apogamy may be involved in the production of numerous juvenile sporophytes

100 years of tropical bryophyte and lichen ecology : a bibliographic guide to the literature from 1901 - 2000

A list of 401 citations pertaining to the ecology of tropical bryophytes and lichens is presented. The bibliography includes publications addressing the biology, ecology, natural history, and physiology of bryophytes and lichens, but generally eschews taxonomic and floristic papers. All citations have been verified, unless denoted with an asterisk (*). An appendix that groups citations by category is provided

A comparison of the moss floras of Chile and New Zealand

Chile and New Zealand share a common stock of 181 species of mosses in 94 genera and 34 families. This number counts for 23.3% of the Chilean and 34.6% of the New Zealand moss flora. If only species with austral distribution are taken into account, the number is reduced to 113 species in common, which is 14.5% of the Chilean and 21.6% of the New Zealand moss flora. This correlation is interpreted in terms of long distance dispersal resp. the common phytogeographical background of both countries as parts of the palaoaustral floristic region and compared with disjunct moss floras of other continents as well as the presently available molecular data

Tropical component of the moss Flora of China

In many ways, it is presumptuous for me to speak on the mosses of the tropical regions of China. Many consider the knowledge about the taxonomy, ecology, and geography of tropical bryophytes inadequate (Pócs 1982; Schuster 1983; Richards 1984), and this is certainly the case for the bryophytes of the tropical regions of China. The taxonomy of Chinese taxa is generally in a state of disarray. Early workers, both Chinese and others, have tended to describe new species based upon minor or inconsequential morphological characters and without apparent reference to related taxa found outside of China. This is clear from recent monographic studies that compared Chinese taxa with taxa throughout the world

New or little known epiphyllous liverworts : 6., Papillolejeunea gen. nov. from Papua New Guinea

A new epiphyllous Lejeuneaceae genus, Papillolejeunea is described. It is a segregate of Lejeunea, characterized by a large, 2-4 celled, stout, papilla like first (distal) tooth on a well developed, inflated lobule, while the second (proximal) tooth is reduced, blunt, hidden with the usually involuted free lobule margin. Four new species are described within the genus. One, Papillolejeunea balazsii, forms the Section nov. Papillolejeunea and the type of the genus, characterized by large number of serially arranged mucilage cells on the dorsal surface and margin of the lobe, at the margin of amphigastria and on the perianth keels. Three further species, Papillolejeunea candida, Papillolejeunea papuana and Papillolejeunea touwii constitute the Section nov. Candidae, where no such dorsal and marginal glands occur. The distribution of the genus seems to be restricted to the mountainous area of New Guinea

Preliminary list of bryophytes of Heishiding Nature Reserve, Guangdong Province, China

Thirty-seven species of hepatics and 66 species of mosses are reported from Heishiding Nature Reserve, including eight taxa new to China and one species new to mainland China. The new taxa for China are Ectropothecium aneitense Broth., Gammiella tonkinensis (Broth. & Par.) Tan, G. touwii Tan, Hypnum fauriei Card., Papillidiopsis complanata (Dix.) Buck & Tan, Syrrhopodon prolifer Schwaegr. var. papillosum (C.Müll.) Reese, Trichosteleum pseudo-mammosum Fleisch., and Trichostomum crispulum Bruch; and the species new to mainland China is Isocladiella surcularis (Dix.) Tan & Mohamed. The phytogeography of the area and the bryophytes are discussed

Systematic screening of bryophytes for antitumor agents

References are made to cytotoxic and/or antitumor compounds that have been isolated - ansamitocin P-3 from Claopodium crispifolium (Hook.) Ren. & Card. and Anomodon attenuatus Hueb., or an associated actinomycete, and ohioensins and pallidisetums from Polytrichum spp. Several hundred collections, which have been obtained from temperate regions of North America during 1990 and 1991, are currently being screened in new bioassays; active sesquiterpene lactones have been recently isolated from species of Porella. The methodologies of collecting and screening bryophyte samples are discussed with consideration to costs based on expected number of samples that might be collected in a day, the diversity in the collections as related to phytogeography and vegetation types, and the bryophyte cover that is vanishing in many forest regions of the United States. The difficulties in obtaining large collections for isolation of active agents are also discussed by examplerecollection of Claopodium crispifolium