Hymenophyllum - Hymenophyllaceae

Hymenophyllum kuhnii C. Chr.

Photo: P. Ballings
Zimbabwe

Photo: P. Ballings
Zimbabwe

Photo: P. Ballings
Mozambique

Photo: P. Ballings
Mozambique

Photo: P. Ballings
Mozambique

Photo: P. Ballings
Mozambique

 

 

 

 

Synonyms

Hymenophyllum polyanthos (Sw.) Sw. var. kuhnii (C. Chr.) Schelpe
Hymenophyllum henkelii Sim
Hymenophyllum meyeri Kuhn
Mecodium kuhnii (C.Chr.) Copel.

Common name

Description

Rhizome wiry and thin, widely creeping, hairless or sometimes set with persistent ventrally attached hairs to 1 mm. Fronds spaced 0.5-5 cm apart. Stipe up to 10 cm long, without hairs, narrowly winged in the upper part. Lamina usually oblong to narrowly elliptic in outline, 3-60 × 1.5-7 cm, 2- or 3-pinnatifid, finely dissected into up to 100-180 lobes per pinnae, hairless. Pinnae to 8 x 1.5 cm, ultimate lobes 3-5 on each side, to 6 x 2.5 mm, set close together or overlapping, linear in outline, apices rounded, margin entire. Rhachis winged. Sori along the costae of the pinnae on the innermost lobes, several per pinna, broadly obconic to rounded in shape, 1.2-1.8 mm long and wide; soral valves entire.

Notes

Can be separated from other species by having hairless fronds and entire lobe margins. Can be distinguished from H. capense by having pinnae that are composed of more than 15 lobes. Can be separated from H. mossambicense by having a rhizome that has persistent ventrally attached hairs and ultimate lobes that are set close together or overlapping.

Derivation

kuhnii: named after Maximillian Kuhn a German physician and botanist.

Habitat

Shaded, moist, high-altitude evergreen forest, ridge-top forest, occasionally in giant heath forest.

Distribution worldwide

Africa, Madagascar.

Distribution in Africa

Angola, Cameroon, Dem. Republic of Congo, Equatorial Guinea (incl. Bioko), Gabon, Guinea, Kenya, Liberia, Malawi, Mozambique, Nigeria, Rwanda, Sierra Leone, South Africa, Tanzania , Uganda, Zambia, Zimbabwe.

Growth form

Epiphytic, lithophytic.

Literature

  • Beentje, H.J. (2008) Hymenophyllaceae. Flora of Tropical East Africa, Pages 9 - 10. (Includes a picture).
  • Burrows, J.E. (1990) Southern African Ferns and Fern Allies. Frandsen, Sandton. Page 97. (Includes a picture).
  • Jacobsen, W.B.G. (1983) The Ferns and Fern Allies of Southern Africa. Butterworths, Durban and Pretoria. Pages 196 - 197. (Includes a picture).
  • Roux, J.P. (2001) Conspectus of Southern African Pteridophyta. Southern African Botanical Diversity Network Report, 13 Page 43.
  • Roux, J.P. (2009) Synopsis of the Lycopodiophyta and Pteridophyta of Africa, Madagascar and neighbouring islands. Strelitzia 23, South African National Biodiversity Institute, Pretoria. Pages 45 - 46.
  • Schelpe, E.A.C.L.E. (1970) Pteridophyta. Flora Zambesiaca, 0 Pages 79 - 80. (Includes a picture).
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