e-Key <span id="jodit_selection_marker_1710754009198_6796456150344603" data-jodit_selection_marker="start" style="line-height: 0; display: none;"></span>v3 - Lydenb<span id="jodit_selection_marker_1710754009198_23059391550435904" data-jodit_selection_marker="end" style="line-height: 0; display: none;"></span>urgia
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Interactive keys to the identification of seed plants of southern Africa using keys based on plant morphology.

Celastraceae - Lydenburgia N.Robson

Description:

  • Shrubs or trees, unarmed, glabrous; stems terete or angular; powdery yellow pigments in bark
  • Leaves often alternate when young, becoming opposite with age, lamina dark green or greyish green and glossy above, paler beneath, coriaceous or subcoriaceous; stipules long, triangular-acicular, caducous
  • Inflorescence a dichasium, 30-40-flowered, pedunculate
  • Flowers bisexual; bracts acicular to triangular
  • Sepals 5, ovate to semi-orbicular
  • Petals 5, oblong, margin entire, whitish
  • Disc fleshy, greenish, subentire with prominent sinuses at points where stamens arise
  • Stamens 5; filaments ± united at base; anthers basifixed, versatile, latrorse
  • Ovary 3-locular, ovoid, 2 ovules per locule; styles long
  • Fruit a 3(4)-valved capsule, narrowly elliptic to tri- or tetragonous, apex truncate and slightly concave; valves usually with prominent sepal ridges on inner surface
  • Seeds 1-3(4), elongate, trigonous, without or with a very reduced aril, rugose-papillose; endosperm fleshy

Nomenclature:

  • Lydenburgia N.Robson
    • Robson: 35 (1965)
  • Catha Forssk. ex Scop. in part
    • Codd: 124 (1966)
    • Van Wyk & Prins: 202 (1987)

Distribution & Notes:

  • Southern Africa: Species 2, narrow endemics in Sekhukhuniland (Northern Province) and Pondoland (Eastern Cape)

References:

  • CODD, L.E. 1966. Celastraceae. The Cassine complex. Bothalia 9
  • ROBSON, N.K.B. 1965. Taxonomic and nomenclatural notes on Celastraceae. Boletim da Sociedade Broteriana, ser. 2, 39
  • VAN WYK, A.E. & PRINS, M. 1987. A new species of Catha (Celastraceae) from southern Natal and Pondoland. South African Journal of Botany 53