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This genus is accepted, and its native range is Madagascar.
Cryptostegia

[FSOM]

M. Thulin et al. Flora of Somalia, Vol. 1-4 [updated 2008] https://plants.jstor.org/collection/FLOS

Morphology General Habit
Lianas or scrambling subshrubs; latex white
Morphology Leaves
Leaves opposite, petiolate
Morphology Reproductive morphology Flowers
Flowers in terminal cymes
Morphology Reproductive morphology Flowers Corolla
Corolla campanulate to funnel-shaped, ± deeply lobed, the gynostegium concealed within corolla-tube
Morphology Reproductive morphology Flowers Corona
Corona-lobes inserted in corolla-tube, entire or 2-fid, filiform, covering the staminal cone, glabrous
Morphology Reproductive morphology Flowers Androecium Stamens
Stamens inserted at base of corolla-tube; pollen in tetrads
Morphology Reproductive morphology Flowers Gynoecium Stigma
Stigmatic head conical-pentagonal
Morphology Reproductive morphology Fruits
Follicles paired, widely divergent, thick-walled
Morphology Reproductive morphology Seeds
Seeds with a tuft of hairs at one end.
Distribution
Two species native to Madagascar, widely grown as ornamentals in the tropics.

[FTEA]

Apocynaceae (part 2), David Goyder, Timothy Harris, Siro Masinde, Ulrich Meve, Johan Venter. Flora of Tropical East Africa, 2012

Morphology General Habit
Liana or scrambling sub-shrub with white latex.
Morphology Stem
Stems twining
Morphology Leaves
Leaves leathery
Morphology Reproductive morphology Inflorescences
Inflorescences terminal, few-flowered.
Morphology Reproductive morphology Flowers Corolla
Corolla pinkish to white, glabrous; tube campanulate to funnelform; lobes narrowly ovate to ovate, obtuse
Morphology Reproductive morphology Flowers Corona
Corolline corona of 5 entire or bifid lobes from about middle of corolla tube; each lobe with basal papillose pad above stamens Gynostegial corona absent
Morphology Reproductive morphology Flowers Androecium Stamens
Stamens from base of corolla tube.
Morphology Reproductive morphology Flowers Androecium Stamens Anthers
Anthers narrowly ovate with acuminate apex, completely fertile, pollen in tetrads.
Morphology Reproductive morphology Flowers Nectaries
Interstaminal nectar pockets at base of corolla tube
Morphology Reproductive morphology Flowers Gynoecium Style
Style terete, style-head narrowly ovoid; translators of elliptically concave receptacle on sticky disc.
Morphology Reproductive morphology Flowers Gynostegium
Gynostegium concealed within corolla-tube
Morphology Reproductive morphology Fruits
Follicles paired, widely divergent, narrowly ovoid, triangular, apex apiculate
Morphology Reproductive morphology Seeds
Seeds oblong, with a hairy coma

Native to:

Madagascar

Introduced into:

Aruba, Assam, Bahamas, Bangladesh, Brazil North, Brazil Northeast, Brazil West-Central, Burkina, Cayman Is., Colombia, Congo, Costa Rica, Cuba, Dominican Republic, El Salvador, Ethiopia, Florida, Gambia, Guinea, Haiti, Hawaii, Honduras, India, Jamaica, Kenya, Leeward Is., Mali, Marianas, Marshall Is., Mauritius, Mexico Northwest, Mexico Southeast, Mexico Southwest, Netherlands Antilles, New Caledonia, Nicaragua, Northern Territory, Panamá, Puerto Rico, Queensland, Réunion, Senegal, Seychelles, Tanzania, Trinidad-Tobago, Venezuela, Venezuelan Antilles, Western Australia, Windward Is.

Cryptostegia R.Br. appears in other Kew resources:

First published in Bot. Reg. 5: t. 435 (1820)

Accepted by

  • Govaerts, R. (1999). World Checklist of Seed Plants 3(1, 2a & 2b): 1-1532. MIM, Deurne.

Literature

Flora of Somalia

  • Flora Somalia, Vol 3, (2006) Author: by M. Thulin [updated by M. Thulin 2008]
  • Klackenberg in Adansonia, sér. 3, 23: 205–218 (2001).

Flora of Tropical East Africa

  • Adansonia, ser. 3, 23: 205–218 (2001)
  • Austr. Syst. Bot. 4: 571–577 (1991)
  • Bot. Reg. 5: t. 435 (1819)

Art and Illustrations in Digifolia
Digital Image © Board of Trustees, RBG Kew

Flora of Somalia
Flora of Somalia
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