Mickel, John T. & Smith, Alan R. 2004. The pteridophytes of Mexico. Mem. New York Bot. Gard. 88: 1-1054.
Thelypteridaceae
Species Description - Rhizomes short- to long-creeping; fronds to 200 cm long or more, somewhat dimorphic, the fertile ones with longer stipes; blades 50–120 x 20–60 cm, occasionally with buds borne in the axils of proximal pinnae; pinnae to 20+ pairs, widest at or near bases, to ca. 30 x 2–5 cm, at the bases unequally rounded or broadly cuneate, the margins entire, wavy, or slightly crenate; lateral veins straight to usually arcuate or subsigmoid, with 12 or more pairs anastomosing and giving rise to excurrent veinlets, the areoles shorter than broad; indument abaxially of sparse hairs on costae, costules, and sometimes veins, the hairs mostly 0.3 mm long or less; sori arcuate along veins at the anastomoses; sporangia glabrous; 2n=144 (Jam, PR).
Polypodium reticulatum L., Syst. Nat., ed. 10, 2: 1325. 1759. Meniscium reticulatum (L.) Sw., J. Bot. (Schrader) 1801(2): 274. 1803. Dryopteris reticulata (L.) Urb., Symb. Antill. 4: 22. 1903. Type. LINN 1251.25, from an unknown locality, possibly Jamaica (Proctor, Fl. L. Antill. 2: 309. 1977).
Thelypteris reticulata differs from T. serrata by the usually entire or slightly crenate pinnae. From T. falcata it differs by the areoles being shorter than wide and the curving (sigmoid) secondary (cross) veins. Several collections cited (e.g., Mexia 9202, Solano C. 315) are atypical of the species. They have narrower pinnae and vary toward large forms of T. angustifolia (Willd.) Proctor. However, that species generally has still narrower pinnae that are more narrowly cuneate at the bases.
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