Geissorhiza
Geissorhiza radians
Geissorhiza are a genus of the family of Iris Family ( Iridaceae ), which is native to southern Africa. The flowers of the plant are sometimes spectacular coloration, they are but so far hardly in culture.
Description
Geissorhiza are perennial, herbaceous plants of small to medium sized. The serving as outlasting tubers are several layers - depending on the subgenus - either built completely concentric ( subgenus Weihea ) or imbricate lying scales composed ( subgenus Geissorhiza ) and are protected by a hard and woody to membranous, rarely fibrous outer layer.
The two or more leaves are usually easy hanging to erect, rarely lying, linear or sword-shaped and smooth surface. Take upwards in size from and can increasingly take on the character of bracts, then so are entirely scheidig. Occasionally, the midrib is highlighted.
The upright, cylindrical in cross-section stem is an ear of wheat, the inflorescence may have one or two flowered or are composed of numerous flowers that nod as buds and sit up until flowering. The radial symmetry and then either star - shaped or saucer to zygomorphic flowers have drooping stamens with erect, one-sided dust bags and a hanging pen. The flowers are colored differently from purple and pink to dark purple and blue, but also red, white or yellow occur, sometimes even in high-contrast combinations.
The chromosome numbers be x = 13
Dissemination
The genus is confined to the winter rainfall areas of southern Africa, most representatives of the southwestern Cape.
System
The genus now includes 84 species, divided by Peter Goldblatt in two subgenera, each with several sections. The related genus is the closest genus Hesperantha.
- Subgenus Weihea section Weihea Geissorhiza inconspicua
- Geissorhiza elsiae
- Geissorhiza roseoalba
- Geissorhiza outeniquensis
- Geissorhiza fourcadei
- Geissorhiza foliosa
- Geissorhiza nigromontana
- Geissorhiza delicatula
- Geissorhiza bracteata
- Geissorhiza nana
- Geissorhiza setacea
- Geissorhiza ornithogaloides
- Geissorhiza malmesburiensis
- Geminata Geissorhiza
- Geissorhiza ovalifolia
- Geissorhiza bolusii
- Geissorhiza parva
- Geissorhiza ovata
- Geissorhiza uliginosa
- Geissorhiza corrugata
- Geissorhiza spiralis
- Geissorhiza karooica
- Geissorhiza pusilla
- Geissorhiza esterhuyseniae
- Geissorhiza cedar montana
- Geissorhiza lithicola
- Geissorhiza purpurascens
- Geissorhiza humilis
- Geissorhiza darlingensis
- Geissorhiza hispidula
- Geissorhiza pappei
- Geissorhiza intermedia
- Geissorhiza unifolia
- Geissorhiza juncea
- Geissorhiza furva
- Stenosiphon Geissorhiza
- Geissorhiza umbrosa
- Geissorhiza alticola
- Geissorhiza hesperanthoides
- Geissorhiza cataractarum
- Geissorhiza nubigena
- Geissorhiza brevituba
- Geissorhiza schinzii
- Geissorhiza longifolia
- Geissorhiza confusa
- Geissorhiza bonae - save
- Geissorhiza tenella
- Geissorhiza exscapa
- Section Intermedia Geissorhiza similis
- Geissorhiza scillaris
- Geissorhiza imbricata
- Geissorhiza purpureolutea
- Geissorhiza barkerae
- Geissorhiza louisabolusiae
- Geissorhiza brehmii
- Geissorhiza sulphurascens
- Geissorhiza minuta
- Geissorhiza eurystigma
- Geissorhiza mathewsii
- Geissorhiza radians
- Geissorhiza burchellii
- Geissorhiza grandiflora
- Geissorhiza tabularis
- Geissorhiza ramosa
- Geissorhiza bryicola
- Geissorhiza scopulosa
- Geissorhiza ciliatula
- Geissorhiza pseudinaequalis
- Geissorhiza silenoides
- Geissorhiza aspera
- Geissorhiza inaequalis
- Geissorhiza monanthos
- Geissorhiza tulbaghensis
- Geissorhiza namaquensis
- Geissorhiza kamiesmontana
- Geissorhiza divaricata
- Geissorhiza subrigida
- Geissorhiza heterostyla
- Geissorhiza arenicola
- Geissorhiza splendidissima
- Geissorhiza inflexa
- Geissorhiza erubescens
- Geissorhiza leipoldtii
- Geissorhiza rupicola
Evidence
- Peter Goldblatt: Systematics of the Southern African Genus Geissorhiza ( Iridaceae - Ixioideae ). In: Annals of the Missouri Botanical Garden. Vol 72, No. 2, 1985, pp. 277-447
- Peter Goldblatt; John C. Manning: New Species of the Southern African Genus Geissorhiza ( Iridaceae: Ixioideae ). In: Novon. Vol 5, No. 2, 1995, pp. 156-161