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This genus is accepted, and its native range is Tropical & S. Africa, W. indian Ocean.
A specimen from Kew's Herbarium

[FZ]

Celastraceae, N. K. Robson. Flora Zambesiaca 2:2. 1966

Morphology General Habit
Trees or shrubs, without latex, glabrous or more usually pubescent; branches terete or flattened or angular.
Morphology Leaves
Leaves, spiral, petiolate; stipules free, small, filiform, caducous.
Morphology Reproductive morphology Inflorescences
Inflorescence pedunculate or rarely sessile, dichasial and becoming monochasial usually after first or second branching or subumbellate, rarely fasciculate or 1–2-flowered, simple, in axil of foliage leaves; bracts persistent.
Morphology Reproductive morphology Flowers
Flowers bisexual, pedicellate.
Morphology Reproductive morphology Flowers Calyx
Sepals 5, imbricate, united at the base, with margin entire or reddish-glandular-denticulate.
Morphology Reproductive morphology Flowers Corolla
Petals 5, green to yellow, usually drying orange to reddish, imbricate in bud, spreading.
Morphology Reproductive morphology Flowers Disc
Disk intrastaminal, single, flat or concave, thin, 5-angled or 5-lobed.
Morphology Reproductive morphology Flowers Androecium Stamens
Stamens 5, with filaments thin, united with base of disk, becoming deflexed; anthers versatile, introrse, deciduous, with separate thecae dehiscing longitudinally.
Morphology Reproductive morphology Flowers Gynoecium Pistil
Ovary superior, sessile, 1/2–2/3-immersed in disk, 2–3-locular, with 2 erect collateral ovules in each loculus; style very short, cylindric, simple; stigma small or ± capitate, entire or almost entire.
Morphology Reproductive morphology Fruits
Fruit drupaceous, ± fleshy.
Morphology Reproductive morphology Seeds
Seed solitary, exarillate, endospermic.

[FTEA]

Celastraceae, N.K.B. Robson, N. Hallé, B. Mathew and R. Blakelock†. Flora of Tropical East Africa. 1994

Morphology General Habit
Trees or shrubs, without latex, glabrous or more usually pubescent; branches terete or flattened or angular, unarmed, forming short shoots
Morphology Leaves
Leaves spiral, entire or not, petiolate; stipules free, small, filiform, caducous
Morphology Reproductive morphology Inflorescences
Inflorescence pedunculate or rarely sessile, dichasial and becoming monochasial (usually after first or second branching) or subumbellate, rarely fasciculate or 1–2-flowered, single in axils of foliage leaves; bracts persistent
Morphology Reproductive morphology Flowers
Flowers bisexual, pedicellate, with pedicels articulated at the base
Morphology Reproductive morphology Flowers Calyx
Sepals 5, equal, imbricate, united at the base, with margin entire or reddish glandular-denticulate
Morphology Reproductive morphology Flowers Corolla
Petals 5, green to yellow, usually drying orange to reddish, imbricate in bud, spreading
Morphology Reproductive morphology Flowers Androecium Stamens
Stamens 5, with filaments thin, united with the base of the disc; anthers versatile, introrse, deciduous, with separate thecae dehiscing longitudinally
Morphology Reproductive morphology Flowers Disc
Disc intrastaminal, single, flat or concave, thin, 5-lobed or 5-angled
Morphology Reproductive morphology Flowers Gynoecium Pistil
Ovary superior, sessile, 1/2–2/3-immersed in the disc, 2–3-locular, with 2 erect collateral ovules in each locule; style very short, cylindric, simple; stigma small or capitate, entire or almost so
Morphology Reproductive morphology Fruits
Fruit drupaceous, ± fleshy
Morphology Reproductive morphology Seeds
Seed solitary, exarillate, with fleshy endosperm.

Native to:

Aldabra, Angola, Botswana, Burundi, Cameroon, Cape Provinces, Caprivi Strip, Central African Repu, Colombia, Comoros, Ethiopia, Free State, Guinea, Kenya, KwaZulu-Natal, Madagascar, Malawi, Mozambique, Namibia, Nigeria, Northern Provinces, Rwanda, Somalia, Sudan, Swaziland, Tanzania, Uganda, Zambia, Zaïre, Zimbabwe

Mystroxylon Eckl. & Zeyh. appears in other Kew resources:

First published in Enum. Pl. Afric. Austral.: 125 (1836)

Accepted by

  • Christenhusz, M.J.M., Fay, M.F. & Chase, M.W. (2017). Plants of the World. An illustrated encyclopedia of vascular plants: 1-792. Kew Publishing, The university of Chicago Press.

Literature

Flora Zambesiaca

  • Enum. Pl. Afr. Austr. Extratrop. 1: 125 (1834–35?).

Flora of Tropical East Africa

  • Enum. Pl. Afr. Austr.: 125 (1834–35)
  • Fl. Pl. Lign. Rwanda: 206 (1982)
  • Fl. Rwanda 2: 230 (1983)
  • Loes. in E. & P. Pf., III. 5, Nachtr. 1: 223 (1897)
  • N. Robson in Bol. Soc. Brot., sér. 2, 39: 29 (1965)
  • N. Robson in Fl. Ethiopia 3: 338 (1990)
  • ed. 2, 20b: 176 (1942)
  • in F.Z. 2: 376 (1966)

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