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Considerations of morphology and geographical distribution suggest that two recently described infraspecific taxa of Sansevieria pinguicula P.R.O. Bally were given inappropriate ranks. It is proposed that subspecies disticha, occurring together with the type in habitat and differing in only one character, should be reduced to the rank of form. It is proposed that variety nana, which occurs at some considerable distance from the type and differs in three characters, should be raised to the rank of subspecies.
The history, introduction and distribution of Sansevieria burdettii in Malawi is described in detail; the species was studied or reported by Theo Peter Campbell-Barker, Richard K. Brummitt, Horst Pfennig, Bruce J. Hargreaves, Mavis Scholes, Dave Richards, and Philip E. Downs before it was finally published as new by Juan B. Chahinian in 2000. Sansevieria burdettii is documented from Malawi by collections or photographs from Nkunguni Mt., Boadzulu Island (identity uncertain), Mpatamanga Gorge, and Kapichira Falls, and literature / sight records report it from near Blantyre and Senga Hills. In addition, the species was recently documented from four localities in Northeastern Mozambique.
Botanica Orientalis: Journal of Plant Science
Phylogenetics of the plant genera Dracaena and Pleomele (Asparagaceae)2011 •
Botanica Orientalis: Journal of Plant Science
Phylogenetics of the plant genera Dracaena and Pleomele (Asparagaceae)2011 •
This research focuses on the biodiversity and the evolutionary history of the world-wide medicinal plant genus, Dracaena, and the plant genus Pleomele. The debate concerning the relationship between Dracaena and Pleomele has continued till date - some botanists continue to include Pleomele within Dracaena but others claimed to separate the two genera. Dracaena is a genus comprising of about 40-100 species world wide, mainly in tropics and subtropics, with the exception of America. Pleomele is a genus that has been circumscribed consisting of 10-50 species in Asia. Till date, its center of biodiversity is unknown. Pleomele is only classified well in Hawaii, but confused with Dracaena in the other parts of Asia. Phylogenetic relationship among the 33 taxa within the Dracaena and Pleomele were reconstructed. DNA sequences from the chloroplast DNA intergenic spacer, trnL-trnF and trnH-psbA were analyzed. A phylogeny was reconstructed using neighbor-joining, maximum parsimony in PAUP*, a...
Systematic Botany
Phylogenetic Relationships among Dracaenoid Genera (Asparagaceae: Nolinoideae) Inferred from Chloroplast DNA Loci.2014 •
Egyptian Journal of Botany
Numerical Taxonomy of the Asclepiadaceae s.l2018 •
A SET of 58 characters was recorded comparatively for a sample of 76 species belonging to 31genera of the Asclepiadaceae R.Br. The characters cover variation among the species in gross vegetative morphology, floral features and structure of the pollination apparatus. The data-matrix was analyzed using a combination of the Jaccard measure of dissimilarity and Ward’s method of clustering in the PC-ORD version 5. Two major groups are recognized in this treatment, the first comprises representative genera of the Asclepiadoideae, while the second is split into two subordinate groups corresponding to the Periplocoideae and the Secamonoideae. Tacazzia seems better removed from the Periplocoideae and placed in the Asclepiadoideae. The generic concept in the family is taxonomically sound; only representative species of Cynanchum were divided between two closely related low-level groups. The currently accepted tribes and subtribes in Schumann’s classification are in need of thorough revision;...
In preparing the treatment of Dracaena for Flore du Gabon and Flore d’Afrique centrale, a relatively high number of taxonomic and nomenclatural novelties were discovered; these are presented here. Within Dracaena five species and one forma are described as new, D. bushii, D. haemanthoides, D. marina, D. wakaensis, D. waltersiae and D. laxissima forma aureilicia. Each new species is provided with a full description and taxonomic notes. Apart from that, five species are reinstated, D. braunii, D. nitens, D. perrottetii, D. tholloniana and D. usambarensis. A further 23 names are treated here as a synonym for the first time: D. bequaertii, D. buettneri, D. cuspidibracteata, D. densifolia, D. gabonica, D. gazensis, D. ledermannii, D. letestui, D. litoralis, D. longipetiolata, D. monostachya var. angolensis, D. oddonii, D. perrottetii var. minor, D. poggei, D. pseudoreflexa, D. reflexa var. buchneri, D. rubroaurantiaca, D. soyauxiana, D. talbotii, D. tessmannii, D. usambarensis var. longifolia, D. vanderystii and Pleomele heudelotii, while for four names a neotype and for 14 names a lectotype has been designated. Distribution maps are provided for a total of 23 species. An index of taxon names is included.
1972 •
A floristic survey of the Asteraceae was carried out at the Pedra do Lagarto, Santa Maria, central region of Rio Grande do Sul state, Brazil. Field expeditions were conducted from August 2014 to September 2015. A total of 106 species were recorded, with 6 listed in the endangered species list of the state of Rio Grande do Sul: Moquiniastrum mollissimum(Malme) G. Sancho, Trixis pallidaLess, Calea clematideaBaker, Aldama megapotamica(Malme) Magenta & Pirani, Chromolaena angusticeps(Malme) RM King & H. Rob., and Isostigma peucedanifolium(Spreng.) Less. This paper presents a list of recorded species from this site
International Journal of Bio-resource and Stress Management
Characterization of Minor Millets (Panicum sumatrense and Eleusine coracana) for Trait Related to Moisture Stress Tolerance2018 •
British Journal of Clinical Pharmacology
Pharmacokinetics and Pharmacogenetics of Rosuvastatin in 30 healthy Zimbabwean individuals of African ancestry2016 •
Advanced Materials
Polyethylene Microtubes from Silica Fiber-based Polyethylene Composites Synthesized by an In Situ Catalytic Method2006 •
Revista Electrónica Interuniversitaria de Formación del Profesorado
La pedagogía de la muerte en la formación inicial docenteProceedings of the 7th International Conference on Cloud Computing and Services Science
Managing and Unifying Heterogeneous Resources in Cloud Environments2017 •
Polymer Degradation and Stability
Chlorine dioxide resistance of different phenolic antioxidants in polyethylene2015 •
Com a Palavra, o Professor
Avaliação em larga escala e currículo: relações entre o PISA e a BNCC2019 •
In die Skriflig/In Luce Verbi
Filosofies-teologiese uitgangspunte van ‘missionale’ kerkwees: ’n Kritiese evaluering2013 •
Journal of Research in Innovative Teaching & Learning
Digital learning space experience and learner continuous use in institutions of higher learning: a moderated-mediation model2013 •
Proceedings of the Fábos Conference on Landscape and Greenway Planning
Legible Greenways: Enhancing the Visual Coherence and Imageability of the Western Sydney Parklands2013 •
2018 •
Journal of BIMP-EAGA Regional Development
Effects of Sodium Bentonite on the Characteristics of Recycled Plasticcomposites as Potential GeomembraneInternational Journal of Implant Dentistry
Clinical and satisfaction outcomes of using one or two dental implants for mandibular overdentures: preliminary short-term follow-up of a randomized clinical trial2021 •
Revista Chilena De Enfermedades Respiratorias
Infección diseminada por BCG en la Región de Los Lagos, Chile: Reporte de cinco casos clínicos2009 •