Dryopteris rosea (E.Fourn.) Mickel & Beitel

  • Authority

    Mickel, John T. & Beitel, Joseph M. 1988. Pteridophyte Flora of Oaxaca, Mexico. Mem. New York Bot. Gard. 46: 1-580.

  • Family

    Dryopteridaceae

  • Scientific Name

    Dryopteris rosea (E.Fourn.) Mickel & Beitel

  • Description

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    Species Description - Rhizome stout, erect, with brown resin; rhizome scales pale reddish-brown, concolorous, 3-5(-7) mm long, 1-1.5(-2) mm wide, ovate-lanceolate, entire with long, twisted tip; fronds clumped; stipe 15-20 cm long, ½ the frond length, pinkish to castaneous, grooved, densely glandular, scales sparse, 3-7 mm long with long twisted tips, margin entire; blade 20-30 cm long, 12-20 cm wide, tripinnate-pinnatifid at base, otherwise mostly bipinnate-pinnatifid, deltate-lanceolate; basal pinnae (6.5-11 cm long, 3.5-5.5 cm wide) shorter than second pinna pair (7.5-12.5 cm, 3.5-6 cm wide); rachis similar to stipe; pinnae linear-deltate, only basal pinnae with larger basiscopic basal pinnule (19-26 mm long), acroscopic basal pinnule shorter (18-22 mm long), other pinnae equilateral to exaggerated ac-roscopically; costae with rare glandular hairs, scales none; pinnules acute, toothed, thin-textured, with glandular hairs on lower surface, minutely glandular only in adaxial groove, scales none, margin glabrous; sori submarginal, indusia nearly round (round-reniform or cordate to horseshoe-shaped), 0.8-1 mm wide, glandular, flat, brown to tan.

  • Discussion

    Aspidium roseum Fournier, Mexic. pl. 1: 97. 1872. Lectotype (chosen here). Mexico. Orizaba, Müller 4 bis (P?; isotype NY!). This taxon, distinguished from the other members of the Dryopteris patula complex by its pink to reddish-brown stipe, short scales (3-7 mm long) that are entire and pale brown with a twisted hairlike tip, variously shaped indusia (including horseshoe-shaped), lanceolate blades and glabrous upper laminar surface (except for costular groove), is frequently collected at mid- to high elevations in the central and Atlantic regions of Oaxaca.

  • Distribution

    Terrestrial in wet forests in central and Atlantic regions; Centro, Etla, Ixtlán, Miahuatlán, Mixe, Sola de Vega, Tlacolula, Tlaxiaco, Villa Alta; 1350-2400 m. Mexico (Jal, Gro, Ver, Oax, Chis).

    Mexico North America|