Asplenium rutaceum (Willd.) Mett.

  • Authority

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

  • Family

    Aspleniaceae

  • Scientific Name

    Asplenium rutaceum (Willd.) Mett.

  • Description

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    Species Description - Rhizome erect; rhizome scales linear-lanceolate, clathrate, black, 2-4 mm long, 0.3-0.5 mm wide; fronds clumped; stipe 1-3 cm long, ca. 1/10 the frond length, castaneous to dark reddish-brown, lustrous, grooved, finely winged; blade 15-35 cm long, 4-8 cm wide, tripinnate, elliptical, tapered at base, apex elongate, naked, proliferous; rachis castaneous, narrowly winged (0.1-0.3 mm wide); pinnae 10-24 pairs, sessile, basal pinnules essentially opposite, perpendicular to and overlapping rachis, somewhat falcate, membranous, both surfaces with sparse, clavate hairs (0.1 mm long), segments obovate, 3-4 mm long, base cuneate, apex acute, pinnules towards apex of pinnae slightly gibbous and falcate; sori linear; indusia 1.5-2 mm long, 0.3-1 mm wide, minutely erose.

  • Discussion

    Aspidium rutaceum Willdenow, Sp. pl. ed. 4, 5: 266. 1810. Type: Plumier, Traité foug. Amér., t. 57. 1705, illustrating a plant from Hispaniola. Asplenium conquisitum Underwood & Maxon ex Christ, Bull. Herb. Boissier II, 7: 270. 1907. Lectotype (chosen by Maxon, Contr. U.S. Natl. Herb. 10:488. 1908). Jamaica. Maxon 1558 (P, US). Syntypes from Jamaica, Guatemala, Costa Rica. For additional synonymy, see Morton and Lellinger (1966: 36). The lustrous reddish-brown stipe and rachis, proliferous apex, gibbous terminal pinnules of pinnae and tripinnate fronds distinguish this species from Asplenium cristatum and A. divaricatum.

  • Distribution

    Terrestrial, occasionally epipetric or epiphytic in wet montane forests; Choapan, Ixtlán, Villa Alta; 600-1700 m. Mexico (Oax, Chis); Guat to Pan; Jam, Hisp; Col to Sur.

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