Costus giganteus Welw. ex Ridl.
  • Welw. ex Ridl., J. Bot. 25: 131 (1887)

This taxon is accepted by WCS higher taxonomy

General Description

Terrestrial. Rootstock creeping. Leafy stems erect, very stout, reaching to a length of 20–24 ft. Leaves 1–2 ft. long, 4–5 in. broad above the middle, acute, quite glabrous on both sides, narrowed gradually to a short broad petiole; ligule truncate, above 1/2 in. long. Scapes in tufts from the rootstock, 4–10 ft. long, 1 1/2 in. diam.; spikes oblong, 5–6 in. long, 3–4 in. diam.; lower bracts, 2 1/2 in. broad. Calyx 3/4 in. long; lobes shorter than the tube. Corolla-lobes oblong, acute, 2 in. long. Lip not much longer than the corolla-lobes, fimbriate at the margin; anther placed above the middle of its acute petaloid connective.


Princes Island Mann, 1146!

Island of St. Thomas Mount Caffé, by streams in primeval woods, 2000–2800 ft., Welwitsch, 6465!

Island of St. Thomas Mann, 1146!


in Journ. Bot. 1887, 131. —Schumann in Engl. Jahrb. xv. 422.

Distribution Map

  • Native distribution
Found in
  • Africa West-Central Tropical Africa Cameroon
  • Gulf of Guinea Is.


  • 1 Figueiredo, E., Paiva, J., Stévart, T., Oliveira, F. & Smith, G.F. (2011). Annotated catalogue of the flowering plants of São Tomé and Príncipe. Bothalia 41: 41-82.
  • 2 Govaerts, R. (1999). World Checklist of Seed Plants 3(1, 2a & 2b): 1-1532. Continental Publishing, Deurne.

 Information From

Flora of Tropical Africa
Flora of Tropical Africa. Published on the Internet;
WCS higher taxonomy
  • B All Rights Reserved
World Checklist of Selected Plant Families
WCSP 2014. 'World Checklist of Selected Plant Families. Facilitated by the Royal Botanic Gardens, Kew. Published on the Internet; Retrieved 2011 onwards
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