Mohria - Anemiaceae

Mohria rigida J.P. Roux

 

 

 

 

Synonyms

Common name

Description

Rhizome creeping, short, up to 5 mm in diameter; rhizome scales chestnut brown, 4-6 mm long, narrowly lanceolate in outline, margin entire. Fronds tufted, herbaceous, spreading to erect, slightly dimorphic with fertile fronds a bit longer than sterile fronds. Stipe 1.6-8.8 cm long, chestnut at the base, strawcoloured at the apex, sparsely set with strawcoloured scales, becoming glabrous at maturity. Lamina 4.3-19.7 cm long, elliptic to narrowly elliptic in outline, 2-pinnate to 3-pinnatifid. Pinnae narrowly ovate, upper surface hairless, lower surface sparsely to densely set with hairs and scales along the costae; ultimate segments lobed, terminating in acute teeth. Rachis sparsely to densely set with hairs and scales. Sporangia single, marginal, under a partially reflexed pinnule margin; exindusiate.

Notes

This taxa can be recognized by broadly ovate scales occuring on the lower surface of the lamina, the crowded, tufted fronds, sporangia generally borne on the entire frond or only the pinnae closest to the base may be sterile.

Derivation

rigida: stiff, referring to the rigid rhachis.

Habitat

Seasonally moist, often exposed situations in rock crevices at high elevations along the eastern escarpment of southern Africa.

Distribution worldwide

Endemic to southern Africa.

Distribution in Africa

Lesotho, South Africa, Swaziland.

Growth form

Lithophytic, terrestrial.

Literature

  • Crouch, N.R., Klopper, R.R., Burrows, J.E. & Burrows, S.M. (2011) Ferns of Southern Africa, A comprehensive guide. Struik Nature. Page 204. (Includes a picture).
  • Roux, J.P. (1995) Systematic studies in the genus Mohria (Pteridophyta: Anemiaceae). VI. Taxonomic review. Bothalia, 25(1) Page 7. (Includes a picture).
  • 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 53.
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