The genus Pohlia is represented by about 29 species in North America. Nine species in the section Pohliella are characterized by asexual, axillary propagula produced in the leaf axils of sterile, or rarely fertile gametophytes. Species of this propaguliferous complex are notably uniform in most sporophytic features, such as exostome and endostome morphology, exothecial cell pattern and annulus morphology, and this group probably forms a monophyletic assemblage. Each of the nine North American propaguliferous Pohlia species can best be defined on the basis of the developmental pathway(s) which characterize its propagula. Because of their similarity in position, appearance, and manner of development, these propagula are considered homogous with axillary branches. A continual gradient of structural complexity exists between propagula of different species, and is interpreted as a reduction series. Evolutionary reduction in propagulum complexity probably occurred through progressive modification of ontogenetic pathways.

  The separate and combined effects of calcium, pH, light, IAA, Gibberrellic acid and Kinetin on spore germination and protenema development in the copiously fruiting moss, Stereophyllum radiculosum (Hook) Mitt. have been studied. Calcium and the growth substances, at the appropriate concentrations, promoted spore germination and protonema development but inhibited the processes when lacking or in excess. Calcium, though required in minute quantities, is essential for bud formation and gametophore production. Effect of light was found not to be phototropic only but also stimulatory for some formative substances required in spore germination and development of protonemata. pH 5-6 was optimal for these processes in the moss, Stereophyllum.

  The Shannon and Brillouin diversity indices have been compared, and an easily calculated approximation of the Brillouin equation was found applicable for most bryophyte studies. Based on this discussion, the correct derivation of H_max and H_min, using the complete Stirling's approximation (not the basis of the Shannon formula) is included.

  Brillouin diversity indices have been calculated for epiphytic bryophytes on northern hardwoods (H ≤ 3.85) and in an alkaline marsh (H ≤ 2.58). Diversity reached an asymptote at about 12 samples in each habitat. Number of species was a good predictor of diversity (r＞.9), but cover was not (r＝.2-.83).

  This is a list of 66 genera including 222 species of Hepaticae (liverworts) gathered by the author during his two stays in Sri-Lanka. The places visited are indicated on a map and the frequency of each species in Ceylon is briefly pointed out.

  The study presents a compilation of publications to date on the bryophytic flora and vegetation of Southwest Asia. In addition, a survey is given of floristics, taxonomy, bryogeography, ecology and fossil finds.

  Breutelia (B.S.G.) Schimp. has one species (B. arundinifolia (Dub.) Fleisch.) in Malaya while Philonotis Brid. has five species (P. speciosa (Griff.) Mitt., P. hastata (Dub.) Wijk & Marg., P. mollis (Dozy & Molk.) Mitt., P. secunda (Dozy & Molk.) Bosch & Lac. and P. turneriana (Schwaegr.) Mitt.). Philonotis mollis and P. speciosa are new to the bryoflora of Malaya. A key to the taxa is provided along with notes on each species.

  A survey of the literature of the Brazilian mosses from 1821 to 1978 revealed 3690 taxa. In this number are included 1608 synonyms, 186 dubious species, nom. nud., hom. inval. and comb. inval.; 1896 species in 265 genera and 56 families are documented with location (State, City), with a list of publications in which they are mentioned. Also, included is a mention of all Brazilian moss literature.