Monographs Details:
Authority:
Mickel, John T. & Smith, Alan R. 2004. The pteridophytes of Mexico. Mem. New York Bot. Gard. 88: 1-1054.
Mickel, John T. & Smith, Alan R. 2004. The pteridophytes of Mexico. Mem. New York Bot. Gard. 88: 1-1054.
Family:
Nephrolepidaceae
Nephrolepidaceae
Description:
Species Description - Rhizomes erect, well developed, stoloniferous, lacking tubers; rhizome scales bicolorous, dark reddish brown, centers lustrous, margins tan, ciliate; stipes 8–30 cm long, brown, persistently scaly at bases; blades firm-herbaceous, linear, 50–200 x (7–)8.5–11 cm, somewhat narrowed at bases; rachises scaly with dense, castaneous, fibrillose scales 2–3 mm long; pinnae many, (8–)9–10 mm wide at bases, (6–)8–9 mm wide at mid-pinna, apices acute to acuminate, bases unequal, basiscopic sides cuneate, acroscopic sides each with an acute basal auricle, margins serrulate toward base, crenate-serrate toward tip; indument on both surfaces lacking or abaxially of sparse castaneous fibrillose scales 0.3–1 mm long; hydathodes lime-dotted on adaxial blade surfaces; indusia dark reddish brown, round-reniform, 0.8–1 mm diam., with distinct sinuses (mature sporangia projecting on all sides); 2n=82 (Trin).
Species Description - Rhizomes erect, well developed, stoloniferous, lacking tubers; rhizome scales bicolorous, dark reddish brown, centers lustrous, margins tan, ciliate; stipes 8–30 cm long, brown, persistently scaly at bases; blades firm-herbaceous, linear, 50–200 x (7–)8.5–11 cm, somewhat narrowed at bases; rachises scaly with dense, castaneous, fibrillose scales 2–3 mm long; pinnae many, (8–)9–10 mm wide at bases, (6–)8–9 mm wide at mid-pinna, apices acute to acuminate, bases unequal, basiscopic sides cuneate, acroscopic sides each with an acute basal auricle, margins serrulate toward base, crenate-serrate toward tip; indument on both surfaces lacking or abaxially of sparse castaneous fibrillose scales 0.3–1 mm long; hydathodes lime-dotted on adaxial blade surfaces; indusia dark reddish brown, round-reniform, 0.8–1 mm diam., with distinct sinuses (mature sporangia projecting on all sides); 2n=82 (Trin).
Discussion:
Polypodium rivulare Vahl, Eclog. Amer. 3: 51. 1807. Type. Montserrat. Ryan [11] (C!-3 sheets). Nephrolepis neglecta Kunze, Linnaea 13: 149. 1839. Type. Mexico. [Veracruz: ?]. “In rupibus hacienda de la laguna (cueva grande),” Schiede s.n. (LZ, destroyed; probable isotype NY!).
The sparse, fibrillose scales on the abaxial blade surfaces, glabrous adaxial surfaces, cuneate pinnae basiscopically, bicolorous, ciliate rhizome scales, and densely scaly rachises distinguish this taxon. Mickel 6460 (NY), cited by Mickel and Beitel (1988: 256) as this species from Oaxaca, is N. pendula.
Distribution:
Mexico North America| Bolivia South America| Brazil South America| Peru South America| Amazonas Ecuador South America| French Guiana French Guiana South America| Suriname South America| Guyana South America| Trinidad and Tobago South America| Venezuela South America| Colombia South America| West Indies| Panama Central America| Costa Rica South America| Honduras Central America| Belize Central America| Guatemala Central America|
Mexico North America| Bolivia South America| Brazil South America| Peru South America| Amazonas Ecuador South America| French Guiana French Guiana South America| Suriname South America| Guyana South America| Trinidad and Tobago South America| Venezuela South America| Colombia South America| West Indies| Panama Central America| Costa Rica South America| Honduras Central America| Belize Central America| Guatemala Central America|