Cheilanthes chaerophylla (M.Martens & Galeotti) Kunze
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Authority
Mickel, John T. & Beitel, Joseph M. 1988. Pteridophyte Flora of Oaxaca, Mexico. Mem. New York Bot. Gard. 46: 1-580.
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Family
Pteridaceae
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Scientific Name
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Description
Species Description - Rhizome stout, compact, horizontal; rhizome scales 2-3 mm long, 0.3-0.5 mm wide, concolorous, dark reddish-brown to black, lustrous, linear-lanceolate; fronds 30-49 cm long, clumped; stipe 14-34 cm long, ½ to ¾ the frond length, castaneous, grooved, glabrous; blade 12-20 cm long, 12-20 cm wide (length: width ratio 0.81.1:1), tripinnate-pinnatifid to quadripinnate, deltate, basal pinnae largest, glabrous above and below; pinnae 15-20 pairs (apical 2-3 pairs entire, upper median 5-8 pairs pinnate, lower median 3-5 pairs bipinnate, basal 1-3 pairs tripinnate), terminal segments pinnatifid, ovate, 0.40.8 cm long, 2-3 mm wide (length: width ratio 1.8-3:1); basal pinnae tripinnate, exaggerated basiscopically, 10-14 cm long, 7-10 cm wide (length: width ratio 1.1-1.8:1), (12-) 14-16 pinnule pairs (apical 2-6 pairs entire, median 5-7 pairs pinnate, 1-5 basal pairs bipinnate); basal basiscopic pinnule 7-7.5 cm long, 10-12 lobes, terminal segment 2-3 mm wide, basal lobe with 4-7 lobules; sori at vein ends, laminar margin curved, strongly modified into 0.3-0.5 mm wide false indusium, margin suberose, surface slightly whitened; spores black, globose.
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Discussion
Allosorus chaerophyllus Martens & Galeotti, Mém. foug. Mexique 47, t. 11. 1842. Type. Mexico. Oaxaca: Juquila, Galeotti 6367 (BR? not found; isotype P!). Cheilanthes chaerophylla is part of the C. angustifolia complex (including also C. cuneata and C. decomposita). See discussion of the complex and intermediates under C. angustifolia.
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Distribution
Exposed or shaded banks; Centro, Pochutla, Sola de Vega, Villa Alta; (750-) 900-1800 m. Mexico (Jal, Col, Mich, Gro, Mex, Oax, Chis); CR.
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