Trichomanes diversifrons (Bory) Mett. ex Sadeb.

  • Authority

    Mickel, John T. & Smith, Alan R. 2004. The pteridophytes of Mexico. Mem. New York Bot. Gard. 88: 1-1054.

  • Family

    Hymenophyllaceae

  • Scientific Name

    Trichomanes diversifrons (Bory) Mett. ex Sadeb.

  • Description

    Deprecated: mb_convert_encoding(): Handling HTML entities via mbstring is deprecated; use htmlspecialchars, htmlentities, or mb_encode_numericentity/mb_decode_numericentity instead in /home/emu/nybgweb/www-dev/htdocs/science-dev/wp-content/themes/nybgscience/lib/VHMonographsDetails.php on line 179

    Species Description - Rhizomes stout, 4–5 mm diam., erect; rhizome hairs dark brown, 1–2 mm long; roots present; fronds strongly dimorphic, sterile fronds 10–35 cm long, fertile fronds 30–35 cm long, clumped; stipes 1/6–1/3 the sterile frond length, 1/2 the fertile frond length, stout, 1–1.3 mm wide, brown, alate in distal 1/4, bases with scattered dark brown hairs 1–2 mm long, glabrous otherwise; sterile blades pinnatifid, 3–5 cm wide, reduced proximally, apices pinnatifid, often with naked, extended rachises ending in proliferous tips; pinnae 12–36 pairs, 5–6 mm wide, glabrous except for rare, brown hairs 0.3 mm long, on rachises, margins serrate with teeth 0.3–0.5 mm; veins 2–3-forked, anastomosing, ending in teeth at margins, false veins absent; fertile fronds 5–9 mm wide, glabrous, veins simple to 1-forked, margins appearing denticulate; involucres immersed, contiguous, 1.5–2mmlong, 0.5 mm wide in middle, mouths 0.8 mm wide, concave.

  • Discussion

    Trichomanes elegans Rudge, Pl. Guian. 24, t. 35. 1805, hom. illeg., non Rich., 1792. Type. French Guiana. Martin s.n. (ex Herb. Rudge) (BM; isotype NY!).

    Hymenostachis diversifrons Bory, Dict. Class. Hist. Nat. 8: 462. 1825. Feea diversifrons (Bory) Copel., Philipp. J. Sci. 67: 74. 1938. Type. “Guiane.” Poiteau s.n. (P?).

    Trichomanes diversifrons is distinct in its strongly dimorphic fronds with undivided fertile blades, pinnatifid sterile blades, anastomosing veins, and concave involucral mouths.

  • Distribution

    Terrestrial in wet forests at low elevations; 150– 350 m. Mexico; Guat, Bel, Hond, Nic, CR, Pan; Col, Ven, Guy, Sur, Fr Gui, Ec, Peru, Braz, Bol.

    Mexico North America| Bolivia South America| Brazil South America| Peru South America| Amazonas Ecuador South America| French Guiana South America| Suriname South America| Guyana South America| Venezuela South America| Amazonas Colombia South America| Panama Central America| Costa Rica South America| Nicaragua Central America| Honduras Central America| Belize Central America| Guatemala Central America|