Hypodematium crenatum (Forssk.) Kuhn

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Synonyms: Aspidium odoratum Bory ex Willd.
Cystopteris odorata (Bory ex Willd.) Desv.
Dryopteris crenata (Forssk.) Kuntze
Lastrea hirsuta (D.Don) Moore
Nephrodium crenatum (Forssk.) Baker
Common names:
Frequency: Sporadic
Status: Native
Rhizome shortly creeping, up to 3 cm in diameter; rhizome scales dense, golden brown, concolorous, lanceolate-acuminate in outline, margin entire, c. 1 cm long. Fronds tufted, arching, herbaceous. Stipe up to 20 cm long, straw-coloured, glabrous except for a dense tuft of scales similar to those on the rhizome at the base. Lamina up to 33 × 30 cm, ovate-triangular in outline, up to 4-pinnatifid at the base with the basal pinnae basiscopically developed. Pinnae up to 22 cm long, oblong-acute in outline towards the apex, unequally triangular-ovate at the base. Pinnules thinly hairy on both surfaces, margins lobed to sometimes toothed. Rhachis pilose. Sori round, up to 12 per pinnule, 1–1.5 mm in diameter; indusium kidney-shaped, pilose with straight white unicellular hairs.
Type location:
Notes: Might be confused with Davallia chaerophylloides. This however has a widely creeping rhizome, pinnae that are weekly basiscopicly developed and glabrous, the sori are situated at the lope tips on the pinnules. Other Dryopteris species are more or less glabrous and have hairless indusia.
Derivation of specific name: crenatum: crenate, referring to the shallow, rounded teeth of the pinnule margins.
Habitat: Known from one isolated site in crevices of schist rock.
Altitude range:
Worldwide distribution: Sporadic in tropical Africa through to Yemen, Madagascar, Mauritius, southern Asia to Nepal, Japan, Malaysia, Sumatra, Pacific Islands.
Zambian distribution (Flora Zambesiaca): W
Zambian distribution (Provinces): Nw
Growth form(s): Lithophyte.
Endemic status:
Red data list status:
Insects associated with this species:
Spot characters: Display spot characters for this species

Burrows, J.E. (1990). Southern African Ferns and Fern Allies. Frandsen, Sandton. Pages 320 - 322. (Includes a picture).

Crouch, N.R., Klopper, R.R., Burrows, J.E. & Burrows, S.M. (2011). Ferns of Southern Africa, A comprehensive guide Struik Nature Pages 492 - 493. (Includes a picture).

Da Silva, M.C., Izidine, S. & Amude, A.B. (2004). A preliminary checklist of the vascular plants of Mozambique. Southern African Botanical Diversity Network Report No. 30 Sabonet, Pretoria Page 16.

Jacobsen, W.B.G. (1983). The Ferns and Fern Allies of Southern Africa. Butterworths, Durban and Pretoria. Pages 451 - 452. (Includes a picture).

Kornas, J. (1979). Distribution and ecology of the Pteridophytes in Zambia Polska Akademia Nauk Wydzial II Nauk Biologicznych Pages 105 - 106.

Roux, J.P. (2001). Conspectus of Southern African Pteridophyta. Southern African Botanical Diversity Network Report 13 Page 140.

Roux, J.P. (2009). Synopsis of the Lycopodiophyta and Pteridophyta of Africa, Madagascar and neighbouring islands Page 123.

Schelpe, E.A.C.L.E. (1970). Pteridophyta Flora Zambesiaca Page 230. (Includes a picture).

Other sources of information about Hypodematium crenatum:

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Flora of Mozambique: Hypodematium crenatum

External websites:

African Plants: A Photo Guide (Senckenberg): Hypodematium crenatum
BHL (Biodiversity Heritage Library): Hypodematium crenatum
EOL (Encyclopedia of Life): Hypodematium crenatum
GBIF (Global Biodiversity Information Facility): Hypodematium crenatum
Google: Web - Images - Scholar
iNaturalist: Hypodematium crenatum
IPNI (International Plant Names Index): Hypodematium crenatum
JSTOR Plant Science: Hypodematium crenatum
Mansfeld World Database of Agricultural and Horticultural Crops: Hypodematium crenatum
Plants of the World Online: Hypodematium crenatum
Tropicos: Hypodematium crenatum
Wikipedia: Hypodematium crenatum

Copyright: Mike Bingham, Annette Willemen, Bart Wursten, Petra Ballings and Mark Hyde, 2011-23

Bingham, M.G., Willemen, A., Wursten, B.T., Ballings, P. and Hyde, M.A. (2023). Flora of Zambia: Species information: Hypodematium crenatum.
https://www.zambiaflora.com/speciesdata/species.php?species_id=213660, retrieved 1 December 2023

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