Based on a taxonomic revision of the genus Leucobryum in Asia, after examination of about 3000 specimens including types, the following important taxonomic characters were newly recognized: (1) central strand of stem, (2) proration of abaxial side of leaf acumina, (3) decurrency of abaxial leucocysts, (4) ratio between thickness of the thickest part and thickness of the median furrow in the cross-sections of leaves, (5) position of perichaetia, (6) ratio between length of the matured inner perichaetial leaf and length of the stem leaf near the perichaetium, (7) length of archegonia, (8) presence of normal male plants, and (9) growing position of dwarf male plants. Among the 78 taxa reported from Asia, 33 taxa were newly reduced to synonyms, 4 taxa were newly reduced to lower status, 2 taxa were excluded from the Asian bryoflora, 4 taxa were combined with other genera, and the following 19 taxa were recognized as Asian Leucobryum. (1) Leucobryum javense (Brid. ex Schwägr.) Mitt., (2) L. javense var. cyathifolium (Dix.) T. Yamaguchi, stat. nov., (3) L. javense var. novae-guineae (Bartr.) T. Yamaguchi, slat. nov., (4) L. javense var. uncinatum (Fl.) T. Yamaguchi, stat. nov., (5) L. scabrum Lac., (6) L. aduncum Dozy & Molk., (7) L. aduncum var. teysmannianum (Dozy & Molk.) T. Yamaguchi, stat. nov., (8) L. aduncum var. scalare (C. Müll. ex Fl.) A. Eddy, (9) L. chlorophyllosum C. Müll., (10) L. boninense Sull. & Lesq., (11) L. juniperoideum (Brid.) C. Müll., (12) L. humillimum Card., (13) L. imbricatum Broth., (14) L. glaucum (Hedw.) Ångstr. in Fries, (15) L. bowringii Mitt., (16) L. sumatranum Broth. ex Fl., (17) L. sericeum Broth. ex Geh., (18) L. sanctum (Brid.) Hampe and (19) L. arfakianum C. Müll. ex Geh. For each species synonymy is given together with pertinent literature along with its type, detailed description and illustration, discussion on taxonomical status, selected specimens examined and geographical distribution.
Four populations of the East Asian endemic moss P. tezukae were sampled from the mountainous districts of central Honshu, Japan. Horizontal starch-gel electrophoresis was used to analyze genetic variation at 13 putative loci for approximately 48 plants per population. Means for percentage of loci polymorphic per population (10.5%), number of alleles per locus (1. 10), and expected heterozygosity (4.1%) were about average for species of Plagiomnium section Rosulata and typical of values observed in other mosses. Most of the genetic vartion resides within local populations (GST = 0.0929), which are only weakly differentiated (mean genetic identity, Ī = 0.953). Plagiomnium tezukae is, however, highly distinct from other related species and is fixed for a number of unique, diagnostic alleles.
Deviations from the normal patterns of both cell division and differentiation are reported in the branch leaves of several Sphagnum species, when grown in axenic cultures. Three processes are considered:
1) Disorders of unequal mitosis,
2) Disorders of equal mitosis,
3) Disorders of differentiation.
The finding are discussed, and related to current knowledge of taxonomy and physiology. The distinction between hyaline and chlorophyllose cell types is blurred by both the presence of intermediate forms and unusual cell patterns. It is suggested that the external environment and internal growth regulation may be important factors in determining the ultimate fate of cells during leaf developmant.
In Africa and her adjacent islands the genus Neckeropsis Reichardt (Neckeraceae, Musci) is represented by seven species: Neckeropsis disticha (Hedw.) Kindb., N. boiviniana (Besch.) Card., N. liliana (Ren.) Broth., N. spuriotruncata (Dus.) Fleisch., N. madecassa (Besch.) Fleisch., N. foveolata (Mitt.) Broth., and N. lepineana (Mont.) Fleisch. A key to the species is provided. The following names are reduced to synonymy: Neckera hookeriacea C. Müll. ex Dus., Neckeropsis bequaertii Thér. & Nav., and Neckeropsis spuriotruncata var. latifolia Broth. & P. Varde with N. madecassa; Distichia afrovictoriae C. Müll. ex Dus. with Neckeropsis foveolata; and Neckera pervilleana Besch. with Neckeropsis lepineana. Lectotypes are selected for Neckera madecassa Besch., N. subdisticha Besch., N. pertruncata Card., Distichia afrovictoriae, Neckera spuriotruncata C. Müll. ex Dus., N. hookeriacea, and N. chevalieri Broth. & Corb. Neckeropsis liliana is reported for the first time for Ivory Coast and Ghana, N. madecassa for Cameroon, Gabon, and Zaire, and N. foveolata for Zaire. Neckeropsis boiviniana and N. liliana are illustrated, and SEM micrographs of the peristome of the latter species are provided.
A taxonomic account of 30 species and one variety of the genus Trypethelium Sprengel found in India is provided. The 12 groups of species based on the structure of pseudostromal formations are distinguished in the genus. Keys are provided for the identification of these groups and for the identification of species. The taxa are described with illustrations. The 19 new species are recognized and two new combinations are proposed.
Pseudo-calymperes Broth. is the correct subgeneric name for species of mosses currently recognized in Syrrhopodon subgenus Calymperopsis. Syrrhopodon langbianensis (Tixier) Reese and S. subgenus Brachybolbos Tixier ex Reese are new combinations; the latter is typified and provided with a formal diagnosis.
Description, illustration, and phenology of antheridia and sporophytes in Takakia ceratophylla are presented as evidence for reclassifying Takakia as a moss. Similarities of the schistocarpous capsules shared by Takakia and Andreaeobryum support a revised classification of the Class Andreaeopsida. Subclass Takakiidae is proposed to include the Order Takakiales and Order Andreaeobryales, separate from Subclass Andreaeidae.