Herbaceous pubescent geophytes; indumentum on leaves, pedicels, ovary and backs of outer tepals; hairs whitish to reddish brown, stellate to biramous, rarely wanting
Rhizome vertical, slow-growing, often large, subglobse to elongated, often with yellow sap; roots stout, present mostly in upper half of rhizome
Leaves few to many, basal, tristichous, striate, linear to ovate, with intercalary meristem, clasping basally and often surrounded by dry basal fibres of older leaves, occasionally petiolate
Inflorescence an axillary raceme or corymb, rarely 1-flowered; scape long, leafless; bracts narrow, 1 or sometimes 2 subtending each flower
Flowers stellate, often opposite, yellow or occasionally white, with green backs; pedicels long or short
Tepals 6(4), free, patent, subequal, narrowly ovate, persistent and connivent during ripening of fruit
Stamens 6(4), exserted, arising from tepal base, spreading, short; filaments filiform to subulate; anthers latrorse, basifixed, ± versatile when older
Ovary turbinate to clavate, 3-locular, with many axile ovules; style short, cylindrical; stigma obconical, 3-grooved
Capsule turbinate to obovoid, thin-walled, circumscissile or loculicidal
Seeds subglobose, black to dark brown, shiny or dull, verrucose to echinulate; raphe and hilum distinct
x = 7 (aneuploids, high polyploidy)
Nomenclature:
Hypoxis L.
Linnaeus: 986, 1366 (1759) in part, excluding H. fascicularis L.
Baker: 174 (1896) in part, excluding subgenus Ianthe
Wilsenach: 75 (1967)
Wilsenach & Papenfuss: 111 (1967)
Wilsenach & Warren: 133 (1967)
Sölch & Roessler: 1 (1969)
Heideman: 889 (1983)
Nordal et al.: 15 (1985)
Distribution & Notes:
Global: Species ± 90, but probably fewer warrant recognition; pantropical, widespread in sub-Saharan Africa, America, SE Asia and Australia
Southern Africa: Species ± 45, centre of diversity, found in all countries and provinces except Botswana and Northern Cape
References:
BAKER, J.G. 1896. Amaryllideae. Flora capensis 6
HEIDEMAN, M.E. 1983. Studies of diagnostic features in the genus Hypoxis L. (Hypoxidaceae) on the Witwatersrand. Bothalia 14
LINNAEUS, C. 1759. Systema naturae, edn 10, Vol. 2. Laurentius Salvius, Stockholm
NORDAL, I., LAANE, M.M., HOLT, E. & STAUBO, I. 1985. Taxonomic studies of the genus Hypoxis in East Africa. Nordic Journal of Botany 5
SÖLCH, A. & ROESSLER, H. 1969. Hypoxidaceae. Prodromus einer Flora von Südwestafrika 151
WILSENACH, R. 1967. Cytological observations on Hypoxis. 1. Somatic chromosomes and meiosis in some Hypoxis species. Journal of South African Botany 33
WILSENACH, R. & PAPENFUSS, J.N. 1967. Cytological observations on Hypoxis 2. Pollen germination, pollen tube growth and haploid chromosome numbers in some Hypoxis species. Journal of South African Botany 33
WILSENACH, R. & WARREN, J.L. 1967. Cytological observations on Hypoxis. Embryo-sac development in H. rooperi and H. filiformis. Journal of South African Botany 33
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