Microgramma nitida (J.Sm.) A.R.Sm.
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Authority
Mickel, John T. & Smith, Alan R. 2004. The pteridophytes of Mexico. Mem. New York Bot. Gard. 88: 1-1054.
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Family
Polypodiaceae
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Scientific Name
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Description
Species Description - Rhizomes long-creeping, 3–6 mm diam.; rhizome scales 6–10 mm long, bicolorous, reddish brown with white margins on acroscopic portion, lance-attenuate with hair-like tips, appressed to spreading, peltate, margins erose; fronds dimorphic, rarely fertile, distant, coriaceous; stipes usually absent, rarely to 5mmlong, glabrous; sterile blades lanceolate to ovate-oblong, 5–12(–20) x 2–4 cm; fertile blades lanceolate to elliptic-lanceolate, 8–20 x (0.8–)1.4–2.5 cm, bases rounded to cuneate, apices obtuse to acute, rarely acuminate, glabrous; sori round, medial, soral scales 1–2 cells wide, hair-like, longer than sporangia, 1–1.3 mm long, sparse.
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Discussion
Phlebodium nitidum J. Sm., Bot. Mag. 72(Compendium): 13. 1846, non Polypodium nitidum Kaulf., 1824. Neotype (chosen by Smith, 1981: 149). “Collect. Hort. Kew, 1851” in J. Smith’s hand (BM!). Polypodium palmeri Maxon, Contr. U.S. Natl. Herb. 17: 600. 1917. Type. Mexico. Tamaulipas: near Go´mez Farias, Palmer 308 (US!; isotypes K!, NY!, UC!, US!).
This species closely resembles M. lycopodioides in its glabrous blades, but is easily distinguished by its thicker rhizomes with larger bicolorous scales.
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Distribution
Epiphyte on tree trunks at usually low elevation; 0–900(–2500) m. Mexico; Guat, Bel, Hond, Nic, CR, Pan; Jam, Barbados; Trin.
Mexico North America| Trinidad and Tobago South America| Barbados South America| Jamaica South America| Panama Central America| Costa Rica South America| Nicaragua Central America| Honduras Central America| Belize Central America| Guatemala Central America|