Asplenium dissectum Sw.

  • 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 dissectum Sw.

  • Description

    Species Description - Rhizome creeping; rhizome scales black, clathrate, long-attenuate, 5-8 mm long; fronds clumped; stipe 6-18 cm long, ¼-1/3 the frond length, with scattered to dense short (0.3-0.5 mm) glandular hairs, grooved, subterete, dark, not alate; blade 28-50 cm long, 5-7 cm wide, once-pinnate, linear, base not reduced, apex pinnatifid, not radicant; rachis black, scales rare; pinnae 25-45 pairs, short-petiolulate (1-1.5 mm), very narrowly lanceolate, apex long-attenuate, 30-45 mm long, 6-10 mm wide, most of length less than 5 mm wide, slightly auricled, teeth sharp and at sharp angle, texture firm, essentially glabrous; veins mostly once-forked, twice-forked at very base, simple toward the tip, diverging at ca. 10° angle; indusia entire, 2-3 mm long, 0.5 mm wide.

  • Discussion

    Type. Jamaica. Swartz (S, photo US!; isotype B-Willd. 19916!). Asplenium bisectum Swartz, J. Bot. (Schrader) 1800(2): 55. 1801, nom. superfl. (based on A. dissectum Swartz). Among the once-pinnate members of sect. Sphenopteris (scaly rachises and sori at low angle), the small, deeply serrate pinnae, pinnatifid apex, and glandular hairs on the stipe distinguish Asplenium dissectum from A. serra in Oaxaca.

  • Distribution

    Epiphytic in wet montane forests; Ixtlán, Villa Alta; 1200-1450 m. Mexico (Oax); Guat to Pan; Cuba, Jam, Hisp; Col & Ven to Braz.

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