e-Key v3 - Gossypium
SANBI Flora Keys Logo
Interactive keys to the identification of seed plants of southern Africa using keys based on plant morphology.

Malvaceae - Hibisceae - Gossypium L.

Description :

  • Shrubs or shrublets, nearly all parts dotted with black oil glands
  • Leaves 3-7-lobed to divided, rounded in outline; caducous or persistent; stipules linear to linear-lanceolate
  • Flowers solitary, axillary, or in several-flowered, sympodial inflorescences, showy; pedicels without articulation
  • Epicalyx of 3, usually foliaceous, persistent bracts
  • Calyx cupuliform, truncate
  • Petals obovate, with scattered black dots, yellow or purple, often purple at base
  • Staminal tube much shorter than petals, densely covered with horseshoe-shaped anthers throughout
  • Gynoecium 3-5-locular, with several ovules per locule; style short, undivided; stigma club-shaped, rarely slightly separating at tip
  • Fruit a loculicidally dehiscent capsule with several seeds per locule
  • Seeds narrowly ellipsoid, with dense, long, woolly hairs (lint or floss), often also with fuzz (a shorter, denser indumentum), sometimes nearly glabrous
  • x = 13 (12) (polyploidy)

Nomenclature:

  • Gossypium L.
    • Linnaeus: 693 (1753)
    • Exell: 428 (1960)
    • Exell: 8 (1969)
    • Vollesen: 337 (1987)

Distribution & Notes:

  • Global : Species ± 39, worldwide in tropics and warm temperate regions; several species cultivated
  • Southern Africa : Species 3, N Namibia, N Botswana, Northern Province, Mpumalanga, Swaziland and KwaZulu-Natal

References:

  • EXELL, A.W. 1960. Malvaceae . Flora zambesiaca 1
  • EXELL, A.W. 1969. Malvaceae (in part). Prodromus einer Flora von Südwestafrika 82
  • LINNAEUS, C. 1753. Species plantarum . Laurentius Salvius, Stockholm
  • VOLLESEN, K. 1987. Gossypium in Africa, Arabia & Pakistan. Kew Bulletin 42,2