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:
Hymenophyllaceae
Hymenophyllaceae
Description:
Species Description - Rhizomes stout, 1–1.5 mm diam., long-creeping; rhizome hairs thin, brown, 1 mm long, and also with scattered, thick, dark brown hairs 1–1.5 mm long; roots absent on climbing stems; fronds 16–36 cm long, distant; stipes very short, absent to 4–12 (–40) mm long, light to dark brown, alate to bases; blades linearoblong, very dark green, drying nearly black, membranaceous, 2-pinnate to 2-pinnate-pinnatifid, 3–6 cm wide, reduced proximally; rachises alate; pinnae glabrous or with occasional short hairs 0.1 mm long; veins free, false veins absent; sori one per pinnule or segment; involucres nearly free from blade tissue, elongate, 1.5–2 mm long, 0.5 mm at middle, 0.3 mm at base, mouth strongly flaring, lips 0.5 mm wide; 2n =72 (Oax).
Species Description - Rhizomes stout, 1–1.5 mm diam., long-creeping; rhizome hairs thin, brown, 1 mm long, and also with scattered, thick, dark brown hairs 1–1.5 mm long; roots absent on climbing stems; fronds 16–36 cm long, distant; stipes very short, absent to 4–12 (–40) mm long, light to dark brown, alate to bases; blades linearoblong, very dark green, drying nearly black, membranaceous, 2-pinnate to 2-pinnate-pinnatifid, 3–6 cm wide, reduced proximally; rachises alate; pinnae glabrous or with occasional short hairs 0.1 mm long; veins free, false veins absent; sori one per pinnule or segment; involucres nearly free from blade tissue, elongate, 1.5–2 mm long, 0.5 mm at middle, 0.3 mm at base, mouth strongly flaring, lips 0.5 mm wide; 2n =72 (Oax).
Discussion:
Type. Mexico. Tabasco: Linden 1508 (isotypes GH!, K!).
Trichomanes martinezii Rovirosa, Pteridogr. Sur Me´xico 106. 1909. Vandenboschia martinezii (Rovirosa) Pic. Serm., Webbia 28: 472. 1973. Type. Mexico. Chiapas: Laguna de Lacanja, Marti´nez s.n. (herb. no. 1103, isotype GH).
This species is commonly confused with T. radicans (q.v.) but can be distinguished most readily by the broadly flaring indusial mouths, tapering blade bases with short stipes, and occurrence at lower elevations, 200–850 m. (vs. (600–)1250–2450 m).
Distribution:
Mexico North America| Bolivia South America| Brazil South America| Peru South America| Ecuador South America| Venezuela South America| Colombia South America| Panama Central America| Puntarenas Costa Rica Central America| Nicaragua Central America| Honduras Central America| Belize Central America| Guatemala Central America|
Mexico North America| Bolivia South America| Brazil South America| Peru South America| Ecuador South America| Venezuela South America| Colombia South America| Panama Central America| Puntarenas Costa Rica Central America| Nicaragua Central America| Honduras Central America| Belize Central America| Guatemala Central America|