You are here
Ferns and relatives / Helechos y afines
Pityrogramma calomelanos (L.) Link
EOL Text
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 yellow 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.
calomelanos: beautifully black, referring to the colour of stipe and rhachis; aureoflava: golden yellow, the undersides of the lamina are covered with yellow powder.
Native of South and Central America but naturalised in DRC, South Africa, Swaziland, Zambia, Comoro Islands, Mauritius, Australia. Now also found in Zimbabwe.
United States
Origin: Exotic
Regularity: Regularly occurring
Currently: Unknown/Undetermined
Confidence: Confident
Varieties 3 (1 in the flora): primarily Neotropics, Africa.
License | http://creativecommons.org/licenses/by-nc-sa/3.0/ |
Rights holder/Author | eFloras.org Copyright © Missouri Botanical Garden |
Source | http://www.efloras.org/florataxon.aspx?flora_id=1&taxon_id=200003611 |
Acrostichum calomelanos Linnaeus, Sp. Pl. 2: 1072. 1753
License | http://creativecommons.org/licenses/by-nc-sa/3.0/ |
Rights holder/Author | eFloras.org Copyright © Missouri Botanical Garden |
Source | http://www.efloras.org/florataxon.aspx?flora_id=1&taxon_id=200003611 |
Rare
Contains the sesquiterpene lactones pterosin (reportedly antibiotic) and calomelanolactone.
Barcode of Life Data Systems (BOLDS) Stats
Public Records: 3
Specimens with Barcodes: 3
Species With Barcodes: 1