Hypoxis (Hypoxidaceae) in Africa: list of species and infraspecific names
TL;DR: A list of species and synonyms is presented for the African Hypoxis L., with an abbreviated reference to the original publication of a species is included.
Abstract: A list of species and synonyms is presented for the African Hypoxis L. An abbreviated reference to the original publication of a species is included in the list. Distribution of taxa is indicated by the country in which they occur. A list of synonyms with accepted or suggested names and the reference to change in status of a taxon is provided. Subsequent publications on the treatment of a taxon are given to denote congruous and differing resolution of taxa by authorities.
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TL;DR: Nine currently recognized taxa out of about 30 species in the Flora of southern Africa region are listed together with their new synonyms and important literature, and a brief discussion is given for each change in name status.
29 citations
TL;DR: The phylogenetic results suggest cautious nomenclatural reorganization to generate monophyly at the generic level of the monocot family Hypoxidaceae (Asparagales), which occurs mainly in the Southern Hemisphere.
28 citations
Cites background from "Hypoxis (Hypoxidaceae) in Africa: l..."
...Hypoxis is most species-rich in southern Africa, but secondary centers of species richness occur to the north in sub-Saharan Africa (Wiland-Szymańska, 2001, 2009; Wiland-Szymańska and Nordal, 2006; Singh, 2006)....
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TL;DR: Micropropagation of Hypoxis colchicifolia was investigated as a means of mass producing plants for both commercialization and re-establishment in the wild, and flowering percentage, corm and leaf size were increased significantly in plants grown in pots compared to those grown in the field over a 28 month period.
19 citations
Dissertation•
29 Oct 2009
TL;DR: ......................................................................................... viii Index to species and infraspecific names ............................................. ix Chapter
Abstract: ......................................................................................... viii Index to species and infraspecific names ............................................. ix Chapter
14 citations
Cites background or methods from "Hypoxis (Hypoxidaceae) in Africa: l..."
...As part of this study, Singh (2006) [Appendix 1.1] presented a list of species and infraspecific names in Hypoxis, including manuscript names....
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...The remaining African taxa are included in a list provided by Singh (2006) [Appendix 1.1]....
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...Snijman & Singh (2003) and Snijman & Singh (2006) offered lists of species of Hypoxidaceae in southern Africa and South Africa respectively....
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TL;DR: The studies of phenology revealed that there are two groups of taxa, one with a resting period and the other without it, and a new conclusion as to a number of all Hypoxis species in Africa is now estimated to be 55, which proves that not only South Africa, but also the Zambesian Region is a very important center of diversity of this genus.
Abstract: A complete key with full descriptions and distributions of all known Hypoxis taxa found in the East Tropical Africa is presented in the monograph. The morphology of all species, subspecies and varieties is described, including such important taxonomic characters for this genus like tuber flesh color, tunic type, indumentum and seed testa sculpture. A succulent leaf structure is described for H. kilimanjarica var. prostrata. The anatomical studies were conducted as a part of taxonomical analysis. They have positively evaluated a taxonomic significance of leaf anatomy characters, such as succulent structure, occurrence of bulliform cells in epidermis outside the keel zone, type and distribution of trichomes. The studies of the Hypoxis leaf anatomy added new data concerning anatomical differentiation of the cataphylls and the inner leaves. Also differentiated mesophyll and simultaneous presence of different types of stomata on one leaf are reported. It has been shown that in some species mucilage canals are present in the inner leaves and that this character is not constant. The number of vascular bundles, which can be determined only on the basis of a leaf section, is useful only in species with a small number of veins, not increasing with a plant age. Because of lack of constancy in distribution, number of stomata accessory cells cannot be used as a diversifying character for the East African species of Hypoxis. The wax crystals are revealed to exist in many species of Hypoxis. The anatomical characters of scapes were also studied in a taxonomic context. A sclerenchyma distribution, as well as number of vascular bundles can be used for a species determination. The presence of sclerenchyma prevents the scapes from bending down after anthesis. The studies of phenology revealed that there are two groups of taxa, one with a resting period and the other without it. It is connected with a climate in which the species occurs. The study of distribution maps of the species occurring in the East Africa are provided for this area, as well as for their entire range. This new knowledge, along with a revision of literature data, led to a new conclusion as to a number of all Hypoxis species in Africa, which is now estimated to be 55. The revision demonstrates that distribution of many of the Hypoxis species is connected with White's phytochoria. It proves that not only South Africa, but also the Zambesian Region is a very important center of diversity of this genus. The number of endemic taxa of Hypoxis for the East Tropical Africa is very low, including only one species and one subspecies. Additionally, a study of vertical ranges of Hypoxis is presented. It reveals that most of the species in East Africa grow in the mountains and they show preferences of dispersal in particular altitudinal levels. The analysis of the vertical distribution within the entire ranges of different taxa has showed differences in the altitudinal position depending on the geographic location. The human influence on Hypoxis is studied in terms of their use in folk medicine and believes. Most of the species of Hypoxis survive quite well in East Africa, being a visible component of various types of grasslands. Some species however are under threat of extinction. This is due to their incapability of surviving in changed habitats, especially in shade of cultivated plants. Another threat is a large-scale collection of species believed to cure the HIV, or sold as a substitute of similar taxa, assumed to possess such qualities. The IUCN categories are proposed for the East African taxa of Hypoxis.
7 citations
Cites background from "Hypoxis (Hypoxidaceae) in Africa: l..."
...In Africa there are only 69 species listed by Singh (2006) that are frequently found in grassland ecosystems of this continent....
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...Such view was also supported by Singh (2006)....
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...Unfortunately, this species name can be applied only sensu lato (Singh 2006), because a taxonomical status of this taxon is not clear....
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...The first effort to address this subject was made by Singh (2006), but the list included in her paper did not contain all publications concerning the African Hypoxis species (e.g. Demissew et al. 2003; Wiland-SzymaÒska & Nordal 2006)....
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...Singh (2006) lists 31 species in South Africa, including 22 endemites....
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References
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01 Jan 2003
TL;DR: The author’s personal journey has taken her through the natural disasters of Bosnia-Herzegovina, including the devastating floods of 1991, which claimed the lives of more than 6,000 people and destroyed thousands of homes.
Abstract: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . iv INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . iv BRYOPHYTA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 HEPATOPHYTA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39 ANTHOCEROTOPHYTA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63 PTERIDOPHYTA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65 GYMNOSPERMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87 DICOTYLEDONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91 MONOCOTYLEDONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 953 INDEX TO FAMILIES AND GENERA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1217
562 citations
Additional excerpts
...muhilensis Wiland: 4 1 2 (1 997b): DRC subsp. kansimbensis Wiland: 414 ( 1997b): Z subsp. muhilensis Wiland: 412 (1997b); Z multiceps Buchinger: 311 (1845); Les....
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24 citations