Pityrogramma calomelanos (L.) Link
var. calomelanos

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Synonyms: Acrostichum calomelanos L.
Gymnocarpa calomelanos (L.) Kaulf.
Gymnogramma ochracea sensu Sim
Pityrogramma insularis Domin
Common names:
Status: Introduced
Rhizome erect to shortly creeping, up to 10 mm in diameter; scales light brown, linear, up to 4 mm long, margins entire. Fronds tufted, arching, firmly herbaceous. Stipe 6-36 cm long, black to chestnut brown, shiny smooth with few scales at the base. Lamina 14-37 × 7-14 cm, ovate to lanceolate in outline, 2- to 3-pinnatifid, long tapering to the apex. Pinnae oblong-lanceolate to narrowly lanceolate, pinnatifid to varying degree, apices acute, margins shallowly toothed and inrolled in dried material, dark green above and covered with a white powder below, glabrous on both surfaces. Rhachis black to chestnut brown, shiny, glabrous. Sori about 3 mm long, situated along the veins in the outer half of the lamina between the costule and margin, often difficult to see because of the yellow powder; exindusiate.
Notes: Could be confused with P. argentea but the latter has more delicate and more divided (3- or 4-pinnatifid, broadly ovate to triangular fronds.
Derivation of specific name: calomelanos: beautifully black, referring to the colour of stipe and rhachis
Habitat: Disturbed sites, moist conditions.
Altitude range: 730 m (approx)
Worldwide distribution: Introduced from Tropical America. Found in tropical West, Central and East Africa southwards to central Mozambique as well as in Malagasy and on the Comoro islands.
Mozambique distribution: Z
Growth form(s): Lithophyte, terrestrial.
Endemic status:
Red data list status:
Insects associated with this species:
Spot characters: Display spot characters for this species

Jacobsen, W.B.G. (1983). The Ferns and Fern Allies of Southern Africa. Butterworths, Durban and Pretoria. Page 222.

Roux, J.P. (2001). Conspectus of Southern African Pteridophyta. Southern African Botanical Diversity Network Report 13 Page 57.

Roux, J.P. (2009). Synopsis of the Lycopodiophyta and Pteridophyta of Africa, Madagascar and neighbouring islands Page 177.

Schelpe, E.A.C.L.E. (1970). Pteridophyta Flora Zambesiaca Pages 107 - 108.

Other sources of information about Pityrogramma calomelanos var. calomelanos:

External websites:

African Plants: A Photo Guide (Senckenberg): Pityrogramma calomelanos
BHL (Biodiversity Heritage Library): Pityrogramma calomelanos
EOL (Encyclopedia of Life): Pityrogramma calomelanos
ePIC (electronic Plant Information Center): Pityrogramma calomelanos
Flora Zambesiaca web site: Pityrogramma calomelanos
GBIF (Global Biodiversity Information Facility): Pityrogramma calomelanos
Google: Web - Images - Scholar
GRIN (Germplasm Resources Information Network): Pityrogramma calomelanos
iNaturalist: Pityrogramma calomelanos
IPNI (International Plant Names Index): Pityrogramma calomelanos
JSTOR Plant Science: Pityrogramma calomelanos
Kew Herbarium catalogue: Pityrogramma calomelanos
Mansfeld World Database of Agricultural and Horticultural Crops: Pityrogramma calomelanos
Plants of the World Online: Pityrogramma calomelanos
Tropicos: Pityrogramma calomelanos
Wikipedia: Pityrogramma calomelanos

Copyright: Mark Hyde, Bart Wursten, Petra Ballings and Meg Coates Palgrave 2007-23

Hyde, M.A., Wursten, B.T., Ballings, P. & Coates Palgrave, M. (2023). Flora of Mozambique: Species information: Pityrogramma calomelanos var. calomelanos.
https://www.mozambiqueflora.com/speciesdata/species.php?species_id=213800, retrieved 22 March 2023

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