Duvalia

Duvalia
Duvalia corderoyi
Scientific classification
Kingdom: Plantae
(unranked): Angiosperms
(unranked): Eudicots
(unranked): Asterids
Order: Gentianales
Family: Apocynaceae
Subfamily: Asclepiadoideae
Genus: Duvalia
Haw. 1812 not Bonpland 1813 nor Nees 1818

Duvalia is a plant genus in the tribe Stapeliae, milkweed subfamily Asclepiadoideae, in the family Apocynaceae (dogbane). The genus was first described in 1812, named after the French physician and botanist Henri-Auguste Duval (1777-1814).[1] It can be found on the Arabian peninsula, in tropical Africa and South Africa.[2][3]

The Duvalia species are succulent, perennial plants with low, planar growth. The shoots are clavate, cylindrical to spherical, in cross-section four-, five-or six-edged, and to about 10 inches long. They can range from green, gray to mottled reddish in color. The flower stems are long and bare. The hermaphroditic flowers measure 1-5 cm in diameter, and have five parts. The crown is yellow ocher, brown, red to dark purple. The five corolla lobes are flat or folded along the middle nerve.

Species[4]
  1. Duvalia anemoniflora (Deflers) R.A. Dyer & Lavranos - Arabia
  2. Duvalia angustiloba N.E.Br. - South Africa
  3. Duvalia caespitosa (Masson) Haw. - South Africa
  4. Duvalia corderoyi (Hook.f.) N.E.Br. - South Africa
  5. Duvalia eilensis Lavranos - Somalia
  6. Duvalia elegans (Masson) Haw. - South Africa
  7. Duvalia galgallensis Lavranos - Somalia
  8. Duvalia gracilis Meve - Cape Province
  9. Duvalia immaculata (C.A.Lückh.) M.B.Bayer ex L.C.Leach - South Africa
  10. Duvalia maculata N.E.Br. - South Africa
  11. Duvalia modesta N.E.Br. - South Africa
  12. Duvalia parviflora N.E.Br. - Cape Province
  13. Duvalia pillansii N.E.Br. - Cape Province
  14. Duvalia polita N.E.Br. - South Africa
  15. Duvalia pubescens N.E.Br. - Cape Province
  16. Duvalia somalensis Lavranos - Somalia
  17. Duvalia sulcata N.E.Br. - Arabia
  18. Duvalia velutina Lavranos - Saudi Arabia
  19. Duvalia vestita'' Meve - Cape Province
formerly included[4]

transferred to Mannia

Wikimedia Commons has media related to Duvalia (Apocynaceae).

References

  1. ↑ Haworth, Adrian Hardy. 1812. Synopsis Plantarum Succulentarum: cum descriptionibus, synonymis, locis, observationibus anglicanis, culturaque 44.
  2. ↑ Tropicos Duvalia
  3. ↑ Gibbs Russell, G. E., W. G. M. Welman, E. Retief, K. L. Immelman, G. Germishuizen, B. J. Pienaar, M. Van Wyk & A. Nicholas. 1987. List of species of southern African plants. Memoirs of the Botanical Survey of South Africa 2(1–2): 1–152(pt. 1), 1–270(pt. 2).
  4. 1 2 The Plant List, Duvalia

Portions of this page were translated from the equivalent page on the German wikipedia accessed July 3, 2012

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