Lastreopsis - Dryopteridaceae

Lastreopsis currorii (Mett. ex Kuhn) Tindale ssp. currorii

 

 

 

 

Synonyms

Aspidium currorii Mett. ex Kuhn
Dryopteris currorii (Mett.) O.Ktze.
Ctenitis currorii (Mett.) Tardieu

Common name

Description

Rhizome ascending to erect, more than 10 cm high and up to 3.5 cm wide; rhizome scales dark brown, narrowly lanceolate in outline, 5–10 x 0.5–1 mm, with a few marginal processes. Fronds tufted, thin, gemmiferous near apex of rhachis and sometimes near apex of pinna rhachis. Stipe light brown to yellowish, 20–90 cm long, 1.5–6 mm in diameter at base, hairless except for the apex of the groove and with scales near rhizome. Lamina dark green above and often with bluish metallic sheen, paler beneath, pentagonal in outline, 20–60 x 15–60 cm, 3–4-pinnate. Pinnae in 14–18 pairs, the lowest pair much enlarged and basiscopically produced, 15–55 x 12–27 cm, with 12–20 pairs of pinnules. Ultimate segments apex broadly rounded, margin finely scalloped; veins free, forked or pinnate in ultimate segments, not reaching the apex, often densely hairy. Rhachis winged near apex, lower surface with many orange or yellow glandular hairs, and some threadlike scales; secondary rhachis with many glandular hairs on lower surface and a few multicellular hairs. Sori rounded, 0.5–1.2 mm in diameter; indusium kidney shaped to rounded, 0.3–0.7 mm in diameter, margin irregular or with a fringe,of hair-like projections.

Notes

Derivation

currorii: named after Mr. A.B. Curror (1811-1845?) of HMS Water-Witch, a Scottish surgeon and plant collector in Angola in the 1840's.

Habitat

Moist forest, sometimes near water or in swampy areas.

Distribution worldwide

Africa, Madagascar.

Distribution in Africa

Angola, Burundi, Cameroon, Central African Republic, Congo, Dem. Republic of Congo, Equatorial Guinea (incl. Bioko), Gabon, Ghana, Guinea, Ivory Coast, Liberia, Nigeria, Tanzania , Uganda.

Growth form

Epiphytic, terrestrial.

Literature

  • Roux, J.P. (2009) Synopsis of the Lycopodiophyta and Pteridophyta of Africa, Madagascar and neighbouring islands. Strelitzia 23, South African National Biodiversity Institute, Pretoria. Page 134.
  • Roux, J.P.; Shaffer-Fehre, M. & Verdcourt, B. (2007) Dryopteridaceae. Flora of Tropical East Africa, Page 13. (Includes a picture).
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