Taxonomic studies of the genus Hypoxis in East Africa

Nordal, Inger; Laane, Morten M.; Holt, Ellen; Staubo, Inger

doi:10.1111/j.1756-1051.1985.tb02067.x

Cited by 15 publications

(3 citation statements)

References 14 publications

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“…This is generally supported by chromosomal data as none of the smaller families is characterized by large chromosomes, and in Asteliaceae, where counts up to 2n = 210 have been reported, the chromosomes are noted to be very small [103]. The only possible exception is Hypoxidaceae in which Hypoxis obtusa is reported to have 2n = 210 [104]. Although there are currently no genome size data for any species of Hypoxis, a related species Rhodohypoxis milloides with 2n = 4x = 24 has a genome size of 1.4 pg suggesting that genomes larger than 8 pg may occur in this family [105].…”

Section: 7supporting

confidence: 58%

Genome Size Dynamics and Evolution in Monocots

et al. 2010

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Monocot genomic diversity includes striking variation at many levels. This paper compares various genomic characters (e.g., range of chromosome numbers and ploidy levels, occurrence of endopolyploidy, GC content, chromosome packaging and organization, genome size) between monocots and the remaining angiosperms to discern just how distinctive monocot genomes are. One of the most notable features of monocots is their wide range and diversity of genome sizes, including the species with the largest genome so far reported in plants. This genomic character is analysed in greater detail, within a phylogenetic context. By surveying available genome size and chromosome data it is apparent that different monocot orders follow distinctive modes of genome size and chromosome evolution. Further insights into genome size-evolution and dynamics were obtained using statistical modelling approaches to reconstruct the ancestral genome size at key nodes across the monocot phylogenetic tree. Such approaches reveal that while the ancestral genome size of all monocots was small (1C = 1.9 pg), there have been several major increases and decreases during monocot evolution. In addition, notable increases in the rates of genome size-evolution were found in Asparagales and Poales compared with other monocot lineages.

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Section: 7supporting

confidence: 58%

Genome Size Dynamics and Evolution in Monocots

et al. 2010

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“…found only in the southern and eastern parts of the continent and frequent ly restricted to habitats with distinctive soil types, ecotones or isolated gorges. Dyer (1939) and later Reid & Dyer (1984) reviewed the 50 species known in southern Africa, whereas Nordal (1979) studied the two species and four subspecies from East Africa.…”

Section: Introductionmentioning

confidence: 99%

“…In C. galpinii the flowers are variable, although mostly red they may also be pink or orange. In southern Africa the perianth is 50-75 mm long, whereas the spec imens from Zimbabwe that are usually called C. galpinii have shorter perianths, 3 0-60 mm long (Nordal 1979). In plants from Zimbabwe C. galpinii may rarely have two flowers per inflorescence, however, elsewhere the inflo rescence is consistently single-flowered and appears from March to July.…”

Section: Introductionmentioning

confidence: 99%

A new <i>Cyrtanthus species</i>(Amaryllidaceae: Cyrtantheae) endemic to the Albany Centre, Eastern Cape, South Africa

Snijman¹

2003

Bothalia

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Cyrtanthus macmasteri Snijman is a rare new species from the Albany Centre of endemism. Eastern Cape. South Africa. Most closely related to C. galpinii Baker, and autumn-flowering species with a single or rarely-flowered inflorescence from the northern regions of southern Africa. C macmasteri is distinguished by a 3 to 6-flowered inflorescence. It grows on steep banks of the Great Kei River and its tributaries and flowers in summer.

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