Blechnum serrulatum Rich.

  • Authority

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

  • Family

    Blechnaceae

  • Scientific Name

    Blechnum serrulatum Rich.

  • Description

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    Species Description - Rhizome erect, connected to other plants by stolons, wide-creeping; rhizome scales bicolorous, with dark brown central stripe, linear-lanceolate, 3-8 mm long, 0.3-0.5 mm wide, margin entire; fronds clumped; stipe ¼-½ the frond length, tan, glabrous, adaxially grooved into rachis and costa; blade 50-120 cm long, 10-30 cm wide, oblong to linear-oblong, abruptly acuminate at apex, once-pinnate, apical pinna similar in shape to lateral pinnae, pinnae linear-oblong, 5-15 mm wide, sessile, inequilateral, articulate and deciduous, coriaceous, abaxially with small pale brown scales (1 mm long, 0.8 mm wide) on costa; veins 1-3 times forked, enlarged vein endings fusing to form margin; margin serrulate; sori on upper pinna pairs; indusia 0.5 mm wide, erose-lacerate.

  • Discussion

    Type. French Guiana. Leblond s. n. (P?) (according to Proctor, Fl. L. Antill. 2: 154. 1977). This species differs markedly from other Oaxacan species of Blechnum in its lack of visibly enlarged vein endings (fusing to form margin instead), articulate pinnae, narrowly spaced veins and (relatively) widely spaced teeth.

  • Distribution

    Terrestrial, wet ditches, swamps at low elevation; 0-100 m in Guat, 900 m in Chis. Mexico (Ver, Chis, Tab, Yuc); US (Fla); Guat to Pan; WI, Trin; Col & Fr Gui to Braz; Old World tropics? (as B. indicum Burman).

    Mexico North America| Brazil South America| French Guiana South America| Colombia South America| Trinidad and Tobago South America| Panama Central America| Guatemala Central America| Florida United States of America North America|