Thelypteris minor (C.Chr.) A.R.Sm.

  • Authority

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

  • Family

    Thelypteridaceae

  • Scientific Name

    Thelypteris minor (C.Chr.) A.R.Sm.

  • 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 suberect to erect, caudices to 10 x 1.5–2 cm; fronds monomorphic or nearly so, mostly 60–80(–100) cm; stipes brownish, 2–4 mm wide, as long as or slightly longer than blades; blades dark green, chartaceous, 30–45 x 20–30(–40) cm; pinnae 8–10 pairs and a nearly conform terminal pinna, 12–16(–20) x 2–2.8(–3.5) cm, incised 0.5–0.6(–0.7) the way to costae, all but the distal several pairs stalked 1–3 mm; segments oblique, subfalcate, 4–6 mm wide, acutish to obtuse at tips, basal 1–3 pairs on proximal pinnae rather abruptly shortened (to a sinuate wing on proximal 1–2 pinna pairs); veins 10–12(–15) pairs per segment, proximal pair from adjacent segments connivent at sinuses or (less frequently) united at an acute angle just below sinuses; indument abaxially of scattered to dense hairs 0.1 mm long on rachises and costae, hairs mostly acicular but a few furcate, tissue between veins glabrous on both sides; sori inframedial, exindusiate; sporangia usually setulose, with hairs 0.1 mm, occasionally glabrous.

  • Discussion

    Dryopteris nicaraguensis (E. Fourn) C. Chr. var. minor C. Chr., Kongel. Danske Vidensk. Selsk. Skr., Naturvidensk. Math. Afd., ser. 7, 10: 252. 1913. Lectotype (chosen by Smith, Phytologia 34: 232. 1976). Guatemala. Alta Verapaz: Secanquin, Maxon & Hay 3196 (US!).

    Unverified, Doubtful, or Mistaken Reports. Tab (reported by Magan˜a, 1992, but not verified, possibly based on a misidentification). QR (Chater 1, CR, cited by Palacios-Rios, 2002c, but not verified). Thelypteris minor is most closely related to T. imbricata and T. nicaraguensis, agreeing with these in having lowermost veins from adjacent segments connivent at the sinuses; the former has the proximal pinnae not so greatly narrowed at the bases (pinnae abruptly narrowed in T. minor), while the latter has fewer, more elliptic, and less deeply lobed pinnae. Breedlove 42003 (DS), from Chiapas, may be a hybrid involving T. minor; the spores and sporangia seem malformed. Citation of this species from Guerrero (Lorea-Herna´ndez & Vela´zquez M., 1998) is based on a misidentification of Lorea 1402 (FCME), which is T. imbricata, and Diego 3913 (FCME), which is T. tetragona.

  • Distribution

    Terrestrial in lowland and montane rain forests; 100–1000 m. Mexico; Guat, Hond, Salv, Nic, CR, Pan.

    Panama Central America| Costa Rica South America| Nicaragua Central America| El Salvador Central America| Honduras Central America| Guatemala Central America| México Mexico North America|