e-Key <span id="jodit_selection_marker_1710509329554_6524854264220523" data-jodit_selection_marker="start" style="line-height: 0; display: none;"></span>v3 - Leucade<span id="jodit_selection_marker_1710509329554_9327827971354243" data-jodit_selection_marker="end" style="line-height: 0; display: none;"></span>ndron
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Interactive keys to the identification of seed plants of southern Africa using keys based on plant morphology.

Proteaceae - Proteoideae - Leucadendron R.Br.

Description:

  • Trees or shrubs, erect or decumbent, dioecious
  • Leaves alternate, entire, sessile to subpetiolate, acicular to oval, obovate or spatulate, glabrous to densely sericeous
  • Flowers regular to very slightly irregular
  • Male flowers in solitary, terminal, globose to cylindric capitula, rarely spikes, each capitulum sessile or pedunculate, with a small involucre of brown, papyraceous bracts at base; perianth cylindric, straight or slightly curved in bud, pubescent or glabrous, limbs linear-elliptic, merging imperceptibly into the linear claws, becoming recurved at anthesis; tube very short; anthers sessile to subsessile, linear, acute; style straight or curved, filiform, glabrous or pubescent proximally; pollen presenter cylindric, clavate or truncate, frequently cleft at apex; hypogynous scales 4, filiform-subulate, rarely 0
  • Female flowers in solitary, terminal capitula, each flower subtended by a floral bract which enlarges greatly and becomes woody after anthesis; mature capitulum a woody, conic, ovoid, or globose cone; perianth as in male, but transversely compressed; staminodes linear, sessile or subsessile; style filiform, glabrous, straight or curved, swollen at apex to form a terminal or oblique, often cleft, stigmatic disc; ovary ovoid, pubescent or glabrous; ovule 1; hypogynous scales as in male
  • Fruit an ovoid to biconvex achene, or a samara, ventricose, trigonal, or compressed, pubescent or glabrous
  • x = 13

Nomenclature:

  • Leucadendron R.Br.
    • Brown: 56 (1810)
    • Stapf et al.: 509 (1912)
    • Williams: 1 (1972)
    • Williams: 121 (1981)
    • Van Wyk: 458 (1990)

Distribution & Notes:

  • Southern Africa: Species 83, mainly Western Cape, Eastern Cape with outliers in KwaZulu-Natal

References:

  • BROWN, R. 1810. On the Proteaceae of Jussieu. Transactions of the Linnean Society of London 10
  • STAPF, O, PHILLIPS, E.P. & HUTCHINSON, J. 1912. Proteaceae. Flora capensis 5,1
  • VAN WYK, A.E. 1990. A new Leucadendron (Proteaceae) from Pondoland with a discussion of its biogeography. South African Journal of Botany 56
  • WILLIAMS, I. 1972. A revision of the genus Leucadendron (Proteaceae). Contributions from the Bolus Herbarium 3
  • WILLIAMS, I. 1981. A new species of Leucadendron (Proteaceae) from the Outeniqua Mountains. Journal of South African Botany 47