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

Euphorbiaceae - Euphorbioideae - Hippomaneae - Excoecaria L.

Description :

  • Trees or shrubs, glabrous, usually with milky latex; mostly dioecious, rarely monoecious
  • Leaves alternate or opposite, entire or crenulate; stipules minute or absent
  • Flowers in uni- or occasionally bisexual, axillary spikes; male dense, female lax
  • Petals 0
  • Disc 0
  • Male flowers sessile or subsessile; calyx small, (2)3(-5)-lobed; lobes slightly imbricate; stamens (2)3(-8), exserted; filaments free; anthers longitudinally dehiscent; ovary 0
  • Female flowers shortly pedunculate; calyx (2)3-lobed; ovary (2)3-locular, each locule with 1 ovary; styles 3, shortly connate at base, entire
  • Fruit a large, inflated capsule breaking into (2)3 bivalved cocci; valves separating and coiling up; exocarp smooth, not separating from endocarp; endocarp thinly crustaceous; columella present
  • Seeds globose or ovoid, caruncle (? swollen funicle) separating from seed and remaining adnate to columella; testa crustaceous; albumen fleshy; cotyledons broad, flat
  • x = 11, 12 (high polyploidy)

Nomenclature:

  • Excoecaria L.
    • Linnaeus: 1288 (1759)
    • Prain: 1018 (1913)
    • Léonard: 133 (1959)
    • Radcliffe-Smith: 382 (1987)
    • Webster: 122 (1994)
    • Radcliffe-Smith: 315 (1996)

Distribution & Notes:

  • Global : Species ± 40, Africa to Asia and Australia
  • Southern Africa : Species 2, Namibia, Botswana, KwaZulu-Natal and Eastern Cape

References:

  • LÉONARD, J. 1959. Notulae systematicae XXVI. Notes sur les espèces africaines continentales des genres Sapium P.Br. et Excoecaria L. Bulletin du Jardin Botanique de l'État Bruxelles 29
  • LINNAEUS, C. 1759. Systema naturae , edn 10. Laurentius Salvius, Stockholm
  • PRAIN, D. 1913. Euphorbiaceae [in part]. Flora of tropical Africa 6
  • RADCLIFFE-SMITH, A. 1987. Euphorbiaceae . Flora of tropical East Africa . Euphorbiaceae Part 1
  • RADCLIFFE-SMITH, A. 1996. Euphorbiaceae . Flora zambesiaca 9, 4
  • WEBSTER, G.L. 1994. Synopsis of the genera and suprageneric taxa of Euphorbiaceae . Annals of the Missouri Botanical Garden 81