Pityrogramma - Pteridaceae

Pityrogramma humbertii C.Chr. var. elongata C.Chr.

 

 

 

 

Synonyms

Pityrogramma elongata (C.Chr.) Pic.Serm.

Common name

Description

Rhizome short; rhizome scales narrowly lanceolate in outline, slightly tapering, emarginate at base, entire, formed of cells with brown walls. Fronds tufted. Stipe blackish violet, 10–20 cm long, glabrous. Lamina triangular, 5–6(–25) cm long and wide, bipinnate above, tripinnate at the base, glabrous. Pinnae 2–3(–6) pairs of opposite pinnae, the lowest petiolate, attaining 3 cm, triangular, obtuse, unequal at the base, divided to the winged rhachis into 2–3 pairs of pinnules up to 1.5 cm long, 7–8 mm wide, pinnatifid into rounded-cuneiform lobes; middle pinnae decurrent on the rhachis, divided almost to the costa into entire rounded cuneiform-fan-shaped segments 4–5 mm wide; segments covered with golden powder beneath or grey-puberulous in material seen. Sori placed along the veins.

Notes

Derivation

humbertii: type specimen was collected by Humbert in DRC.

Habitat

Swampy places, Hypericum forest.

Distribution worldwide

See African distribution.

Distribution in Africa

Dem. Republic of Congo, Rwanda, Uganda.

Growth form

.

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 178.
  • Verdcourt, B. (2002) Adiantaceae. Flora of Tropical East Africa, Pages 44 - 45.
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