Mickel, John T. & Smith, Alan R. 2004. The pteridophytes of Mexico. Mem. New York Bot. Gard. 88: 1-1054.
Polypodiaceae
Species Description - Differs from M. reptans by: rhizome scales tightly appressed and more broadly lanceolate and without long-attenuate tips; sterile blades more obviously scaly; fronds subdimorphic (vs. strongly dimorphic in M. reptans); fertile blades elliptic, mostly 5–10 mm wide and with sori not overlapping the blade margins; 2n =148 (Jam, PR).
Polypodium piloselloides L., Sp. Pl. 2: 1083. 1753. Type. “Habitat in America meridionali,” LINN 1251.3 is this species, but, according to Jackson (1912) was added after 1755; Plumier and Petiver illustrations also cited.
Unverified, Doubtful, or Mistaken Reports. Tab (reported by Magan˜a, 1992, based on a misidentification of M. reptans). Tryon and Tryon (1982: 717) commented that M. reptans and several other scaly-bladed species were “poorly distinguished” from M. piloselloides. More recently, R. Tryon and Stolze (1993) separated these two and distinguished them by the more tightly appressed rhizome scales of M. piloselloides (vs. loosely appressed and with tips widely spreading in M. reptans) and the whitish (vs. orangish to castaneous in M. reptans) scales on the adaxial laminar surfaces. However, they also included M. acatallela Alston in synonymy under M. piloselloides, and we believe the former is adequately distinct from both M. piloselloides and M. reptans. Moreover, they accorded a much broader range to M. piloselloides than we give it.
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