Mickel, John T. & Smith, Alan R. 2004. The pteridophytes of Mexico. Mem. New York Bot. Gard. 88: 1-1054.
Polypodiaceae
Species Description - Rhizomes ascending; rhizome scales orange-brown, 1–1.3 mm long; stipes to ca. 1.5 cm long, dark brown at very base, green distally, glabrous; blades dimorphic, sterile blades shorter, deeply pinnatifid, 10–20 x 2–3 mm, segments 1–1.5 mm long; fertile blades longer, 35–60 mm long, fertile in distal half, basal sterile part pinnatifid, 25–35 x 1–1.5 mm, the segments ascending, deltate, 0.8–1 mm long, chartaceous, glabrous; veins evident on both sides of blades; hydathodes none or not readily visible; sori basal on unbranched veins, appearing nearly costal but not in deep grooves, the blades somewhat folded (conduplicate); 2n=ca. 105 (Jam, Trin), 140 (Jam).
Acrostichum serrulatum Sw., Prodr. 128. 1788. Grammitis serrulata (Sw.) Sw., J. Bot. (Schrader) 1800(2): 18. 1801. Xiphopteris serrulata (Sw.) Kaulf., Wesen Farrenkr. 87. 1827. Polypodium serrulatum (Sw.) Mett., Fil. Hort. Bot. Lips. 30. 1856, hom. illeg., non Sw., 1802. Polypodium duale Maxon, Contr. U.S. Natl. Herb. 16: 61. 1912. Type. Jamaica. Swartz s.n. (S, isotype US!). For additional synonymy, see L. E. Bishop (1978).
This species is readily distinguishable from other species of Cochlidium by the pinnatifid sterile blades and the toothed or pinnatifid sterile portions of fertile blades. In Mexico, it is most likely to be confused with certain species of Lellingeria, particularly L. hellwigii and L. prionodes, which differ in the broader blades (2.5–4.5 mm wide in fertile portion), darker, clathrate rhizome scales, bifurcate hairs along the abaxial costae, and the flattish (rather than more-or-less conduplicate) fertile part of blade.
Mexico North America| Guatemala Central America| Belize Central America| Honduras Central America| El Salvador Central America| Nicaragua Central America| Costa Rica South America| Panama Central America| West Indies| Venezuela South America| Trinidad and Tobago South America| Guyana South America| Galápagos Islands Ecuador South America| Peru South America| Brazil South America|