e-Key v3 - Hewittia
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Interactive keys to the identification of seed plants of southern Africa using keys based on plant morphology.

Convolvulaceae - Hewittia Wight & Arn.

Description :

  • Twining herb, pubescent
  • Leaves petiolate, broadly cordate, entire, angled, or 3-lobed
  • Flowers axillary, long-peduncled, 1-3 together; bracteoles at some distance from calyx
  • Calyx of 5 sepals with 2 outer larger than others
  • Corolla funnel-shaped or campanulate; limb plicate, 5-angled or obscurely 5-lobed
  • Stamens arising at base of corolla tube; included; filaments linear, dilated and with few hairs at base; anthers oblong-linear, lobed at base
  • Disc shortly cup-shaped
  • Ovary imperfectly 1-locular, with 4 ovules, densely pilose; style simple, included; stigmas 2, ovate-oblong, thick
  • Fruit a capsule, dehiscing into 4 valves
  • Seeds black, glabrous, opaque
  • x = 15

Nomenclature:

  • Hewittia Wight & Arn.
    • Wight & Arnott: 22 (1837)
    • Meeuse: 698 (1957)
    • Meeuse & Welman: 52 (2000)
  • Shutereia Choisy
    • Choisy: 485 (1833).
  • Eremosperma Chiov.
    • Chiovenda: 143 (1936)

Distribution & Notes:

  • Global : Species 1: Hewittia malabarica (L.) Suresh, tropics and subtropics of Old World
  • Southern Africa : Northern Province, Mpumalanga, Swaziland, KwaZulu-Natal, Eastern Cape

References:

  • CHIOVENDA, E. 1936. Eremosperma . Flora Somala 3
  • CHOISY, J.D. 1833. Calonyction , Jacquemontia , Pharbitis , Shutereia . Mémoires de la Société de Physique et d'Histoire Naturelle de Genève 6
  • MEEUSE, A.D.J. 1957. The South African Convolvulaceae . Bothalia 6
  • MEEUSE, A.D.J. & WELMAN, W.G. 2000. Convolvulaceae . Flora of southern Africa 28,1
  • WIGHT, R. & ARNOTT, G.W. 1837. Hewittia . Madras Journal of Literature and Science 1,5