e-Key <span id="jodit_selection_marker_1710244721710_7511063842307066" data-jodit_selection_marker="start" style="line-height: 0; display: none;"></span>v3 - Holos<span id="jodit_selection_marker_1710244721710_012473692760662791" data-jodit_selection_marker="end" style="line-height: 0; display: none;"></span>tylon
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Interactive keys to the identification of seed plants of southern Africa using keys based on plant morphology.

Lamiaceae - Nepetoideae - Ocimeae - Plectranthinae - Holostylon Robyns & Lebrun

Description:

  • Herbs or subshrubs with 1 or more erect, virgate stems arising from a perennial base
  • Leaves often quite large, margin toothed
  • Inflorescences terminal, paniculate, often occupying a third or more of the plant; bracts minute, each subtending a single flower
  • Calyx not or slightly gibbous at base, subequally 5-toothed, accrescent; tube campanulate; teeth short, deltoid to deltoid-lanceolate
  • Corolla bilabiate; tube short, declinate, bent and expanding just beyond calyx; upper lip erect, short, obscurely 4-lobed; lower lip large, boat-shaped
  • Stamens 4, declinate, arising from mouth of corolla tube and lying in lower lip; filaments united at base into a sheath open above
  • Style slightly exceeding stamens; stigma entire
  • Nutlets subrotund, slightly compressed, triquetrous, glabrous

Nomenclature:

  • Holostylon Robyns & Lebrun
    • Robyns & Lebrun: 103 (1929)
    • Codd: 173 (1985)

Distribution & Notes:

  • Global: Species ± 4, in tropical Africa
  • Southern Africa: Species 1: Holostylon baumii (Gürke) G.Tayl., known from Botswana

References:

  • CODD, L.E. 1985. Lamiaceae. Flora of southern Africa 28
  • ROBYNS, W. & LEBRUN J. 1929. Holostylon. Annales de la Société Scientifique de Bruxelles, Sér. B, 49

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