e-Key <span id="jodit_selection_marker_1710150862237_4823694013690487" data-jodit_selection_marker="start" style="line-height: 0; display: none;"></span>v3 - G<span id="jodit_selection_marker_1710150862237_25960418739335944" data-jodit_selection_marker="end" style="line-height: 0; display: none;"></span>osela
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Interactive keys to the identification of seed plants of southern Africa using keys based on plant morphology.

Scrophulariaceae - Scrophularioideae - Selagineae - Gosela Choisy

Description:

  • Perennial, heath-like shrublets; branches slender; many axillary brachyblasts present; hairs on stems, leaves, bracts and calyx with sculptured walls
  • Leaves alternate, linear, ± fascicled
  • Flowers bracteate, sessile, in compact spikes with lower flowers longer than upper, resulting in corymb-like spike; elongate in fruit
  • Bracts free from calyx, ovate-lanceolate, villous, much shorter than corolla tube
  • Calyx tubular, 5-lobed, bilabiate, villous, shorter than bracts; tube shallowly campanulate; lobes at least equal to tube in length, 2 posterior ones incompletely divided
  • Corolla tubular, 5-lobed, leathery; tube long, cylindrical, widening slightly towards apex; limb much shorter; posterior lip 2-lobed, without orange patch, exterior in bud; anterior lip 3-lobed; lobes subequal, spreading, obovate-oblong
  • Stamens usually 4, rarely 2 (posterior), if 4, didynamous; posterior pair arising high in corolla tube, with filaments adnate to tube for most of their length, free part shorter than included anthers; anterior pair with longer filaments but smaller anthers, arising in mouth of tube, exserted; if 2 stamens either anterior filaments with sterile anthers or these stamens completely aborted; filaments linear; anthers synthecate, dorsifixed; staminodes 0(2)
  • Nectary single, basal on posterior side of ovary
  • Ovary bilocular, ellipsoid to elongate; ovules 1 per locule; or sometimes ovary unilocular with anterior locule absent or ovule aborted; style slender, terete, exserted; stigma linear, flat
  • Fruit of 1 or 2 hard-walled cocci, enclosed in persistent calyx, convex on one side, curved, bluntly beaked
  • Seeds fusiform with fleshy testa

Nomenclature:

  • Gosela Choisy
    • Choisy: 22 (1848)
    • Rolfe: 177 (1901)
    • Hartley & Balkwill: 471 (1990)
    • Hilliard: 318 (1990)
    • Hilliard: 1 (1999)

Distribution & Notes:

  • Southern Africa: Monotypic: Gosela eckloniana Choisy, Western Cape: Clanwilliam, Ceres and Piquetberg Districts

References:

  • CHOISY, J.D. 1848. Gosela. In A.P. de Candolle, Prodromus 12. Masson, Paris
  • HARTLEY, I.H. & BALKWILL, K. 1990. A taxonomic account of Agathelpis, Globulariopsis and Gosela (Selaginaceae). South African Journal of Botany 56
  • HILLIARD, O.M. 1990. A brief survey of Scrophulariaceae - Selagineae. Edinburgh Journal of Botany 47
  • HILLIARD, O.M. 1999. The tribe Selagineae (Scrophulariaceae). Royal Botanic Garden, Edinburgh
  • ROLFE, R.A. 1901. Myoporineæ & Selagineæ. Flora capensis 5,1