Athyrium arcuatum Liebm.

  • Authority

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

  • Family

    Athyriaceae

  • Scientific Name

    Athyrium arcuatum Liebm.

  • Description

    Species Description - Rhizomes erect; rhizome scales 6–8(–10) x 0.8–1 mm, brown, some with black streaks or slightly bicolorous, lanceolate, entire; fronds clumped; stipes 20–55 cm long, 1/2 the frond length, stramineous, glabrous except with scattered scales at bases; rachises stramineous, glabrous; blades bipinnate-pinnatifid, 24–40 x 15– 44 cm, deltate-lanceolate, basal pinnae not deflexed, (6.5–)8–17 x (2.5–)3.5–8 cm, apices pinnatifid, basal basiscopic pinnule short, 0.6–1.8 cm long, largest basiscopic pinnules 1.5–4 cm long, basiscopic pinnules larger than acroscopic ones, costae and pinnule surfaces glabrous or with scattered black hair-like scales, wings along costae and segment midribs conspicuous adaxially, often with a tooth 0.5–0.8 mm long at vein branching, pinna margins serrately incised to laciniate; sori linear to hooked; indusia 0.5–0.8(–1) x 0.1–0.3(–0.5) mm, entire or with occasional fimbriae.

  • Discussion

    Type. Mexico. Puebla: Barranca de Chinautla, Liebmann s.n. [Pl. Mex. 2303, Fl. Mex. 863] (C!-2 sheets; isotype US!, frag. NY!).

    Athyrium galeottii Fe´e, Me´m. Foug. 5: 187. 1852. Asplenium martensii Mett., Abh. Senckenberg. Naturf. Ges. 3: 244. 1859, non Asplenium galeottii Fe´e, 1857. Athyrium martensii (Mett.) T. Moore, Index Fil. 186. 1860, nom. superfl. Type. Mexico. [Veracruz:] Pic d’Orizaba, Galeotti 6269 (P!; isotype K!, frag. NY!).

    Athyrium pumilio Christ, Bull. Herb. Boissier, se´r. 2, 3: 147 1903. Type. Mexico. Chiapas: Near San Cristo´bal, Mu¨nch 91 (P!, photos NY!, UC!; isotypes DS!, US!, frag. NY!).

    Athyrium barnebyanum Mickel & Beitel, Mem. New York Bot. Gard. 46: 77. 1988. Type. Mexico. Me´xico: 5-6 mi NE of Amanalco on Rte 56, ca. 26 mi from jct with Rte 15, Mickel 657 (NY!; isotype ISC!).

  • Distribution

    Terrestrial in moist woods and along streams, deciduous forests, montane cloud forests; 1800-3200 m. Mexico; Guat.

    Mexico North America| Guatemala Central America|