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This genus is accepted, and its native range is Tropical & S. Africa, Madagascar.
Aristea torulosa

[FZ]

Iridaceae, P. Goldblatt. Flora Zambesiaca 12:4. 1993

Morphology General Habit
Evergreen perennial herbs with short rhizomes, aerial parts persisting for more than one year.
Morphology Leaves
Leaves equitant, linear to lanceolate, distichous, mostly basal.
Morphology Stem
Stems terete to compressed and 2-sided, often strongly winged, simple or branched, bearing reduced leaves or leafless.
Morphology Reproductive morphology Inflorescences
Inflorescences composed of binate rhipidia (umbellate flower clusters in 2 series, unless reduced to 1–2 flowers); binate rhipidia 1-many, terminal on the main and secondary axes, or axillary and then stalked or sessile; spathes (enclosing the binate rhipidia) herbaceous to membranous or scarious, entire or lacerate; floral bracts (within the spathes) membranous or scarious, entire or lacerate.
Morphology Reproductive morphology Flowers
Flowers frequently sessile, actinomorphic, blue, each lasting one morning only, the perianth twisting spirally on fading.
Morphology Reproductive morphology Flowers Tepal
Tepals basally connate for c. 1 mm or less, usually subequal, lanceolate to obovate, spreading horizontally.
Morphology Reproductive morphology Flowers Androecium Stamens
Stamens erect, filaments free, anthers oblong.
Morphology Reproductive morphology Flowers Gynoecium Pistil
Ovary ovoid to turbinate or cylindric, trigonous, often included in the bracts; style filiform, usually eccentric, dividing apically into 3 short stigmatic lobes.
Morphology Reproductive morphology Fruits
Capsules ovoid-ellipsoid to oblong-cylindric, usually 3-lobed (in some South African species 3-winged), included or exserted from the spathes, the remains of the perianth usually persisting on the capsules.
Morphology Reproductive morphology Seeds
Seeds few to many per locule, rounded to angular (laterally compressed in some South African species).

[FTEA]

Iridaceae, Peter Goldblatt. Flora of Tropical East Africa. 1996

Morphology General Habit
Evergreen herbs with rhizomes
Morphology Leaves
Leaves equitant, linear to lanceolate, distichous, crowded basally, usually a few also cauline
Morphology Stem
Stems rounded to compressed and 2-sided, or strongly winged, simple or branched, bearing reduced leaves or leafless
Morphology Reproductive morphology Inflorescences
Inflorescences binate rhipidia (umbellate flower-clusters in 2 series, unless reduced to 1-2 flowers); the binate rhipidia 1-many, either terminal on the main and secondary axes or axillary, then stalked or sessile; spathes (enclosing the binate rhipidia) green or partly to entirely membranous or scarious, the margins entire, irregularly torn or fringed; floral bracts (within the spathes) membranous or scarious, entire, irregularly torn or fringed
Morphology Reproductive morphology Flowers
Flowers frequently sessile, actinomorphic, blue, each lasting one morning only, the perianth twisting spirally on fading; tepals basally connate for 0.5-2 mm., usually subequal, lanceolate to obovate, spreading horizontally
Morphology Reproductive morphology Flowers Androecium Stamens
Stamens erect, free; anthers oblong
Morphology Reproductive morphology Flowers Gynoecium Pistil
Ovary ovoid to oblong and trigonous, usually included in the bracts; style filiform, eccentric, dividing apically into 3 short stigmatic-lobes, occasionally barely 3-fid
Morphology Reproductive morphology Fruits
Capsules ovoid-ellipsoid to oblong-cylindric and usually 3-lobed (in some South African SPECIES 3-winged), sessile or stalked, the remains of the perianth usually persisting on the capsules
Morphology Reproductive morphology Seeds
Seeds few-many per locule, rounded to angular (radially compressed in some South African SPECIES).

Native to:

Angola, Burundi, Cameroon, Cape Provinces, Ethiopia, Free State, Guinea, Kenya, KwaZulu-Natal, Lesotho, Madagascar, Malawi, Mozambique, Nigeria, Northern Provinces, Rwanda, Sierra Leone, Sudan, Swaziland, Tanzania, Uganda, Zambia, Zaïre, Zimbabwe

Introduced into:

Great Britain, Hawaii, Jamaica, West Himalaya

Aristea Aiton appears in other Kew resources:

First published in Hort. Kew. 1: 67 (1789)

Accepted by

  • Govaerts, R. (1995). World Checklist of Seed Plants 1(1, 2): 1-483, 1-529. MIM, Deurne.

Literature

Flora of West Tropical Africa

  • F.T.A. 7: 346
  • H. Weimarck in Lunds Univ. Årssk. N.F. Avd. 2, 36: 1-140 (1940).
  • Hort. Kew. 1: 67 (1789)

Flora Zambesiaca

  • Vincent in S. African J. Bot. 51: 209–252 (1985).
  • Weimarck in Acta Univ. Lund. n.s., 36, 1 (1940).
  • in Hort. Kew. ed. 1, 1: 67 (1789).

Flora of Tropical East Africa

  • Vincent in S. Afr. Journ. Bot. 51: 209-252 (1985)
  • Weim. in Lunds Univ. Arssk., N.F., Avd. 2, 36 (1940)
  • in Hort. Kew. 1: 67 (1789)

Flora Zambesiaca
Flora Zambesiaca
http://creativecommons.org/licenses/by-nc-sa/3.0

Flora of Tropical East Africa
Flora of Tropical East Africa
http://creativecommons.org/licenses/by-nc-sa/3.0

Kew Backbone Distributions
The International Plant Names Index and World Checklist of Selected Plant Families 2021. Published on the Internet at http://www.ipni.org and http://apps.kew.org/wcsp/
© Copyright 2017 World Checklist of Selected Plant Families. http://creativecommons.org/licenses/by/3.0

Kew Names and Taxonomic Backbone
The International Plant Names Index and World Checklist of Selected Plant Families 2021. Published on the Internet at http://www.ipni.org and http://apps.kew.org/wcsp/
© Copyright 2017 International Plant Names Index and World Checklist of Selected Plant Families. http://creativecommons.org/licenses/by/3.0