Botrychium schaffneri Underw.

  • Authority

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

  • Family

    Ophioglossaceae

  • Scientific Name

    Botrychium schaffneri Underw.

  • Description

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    Species Description - Buds hairy; fronds (4–)10–40 cm long, sterile blades 8–12 x 12–16 cm, deltate, ternately compound to tripinnate-pinnatifid, mostly 3(–4)-pinnate; segments ovate, oblong or roundish, small, to 6 x 5 mm, margins serrulate to entire, all segments roughly the same size, terminal segment of each pinna not distinctly larger; leaf tissue fleshy, thick-herbaceous, glabrous or with a few hairs; sporophores inserted at or just below the ground surface, exceeding the sterile blades in height, commonly absent; 2n = ca. 90 (Méx).

  • Discussion

    Sceptridium schaffneri (Underw.) Lyon, Bot. Gaz. 40: 458. 1905. Type. Mexico. San Luis Potosi´: In mountains near San Luis Potosi´, Oct 1879 [& 1881], Schaffner s.n. (NY!; isotype K!). Botrychium pusillum Underw., Bull. Torrey Bot. Club 30: 50. 1903. Sceptridium pusillum (Underw.) Lyon, Bot. Gaz. 40: 458. 1905. Botrychium schaffneri Underw. var. pusillum (Underw.) R. T. Clausen, Mem. Torrey Bot. Club 19(2): 42. 1938. Type. Mexico. Me´xico: Sierra de las Cruces, Pringle 5192 (NY!; isotype GH!).

    Botrychium schaffneri is distinguishable from B. decompositum in having smaller, ovate to oblanceolate segments of relatively uniform size and shape. There is considerable variation in plant size and compactness.

  • Distribution

    In pine-oak woods. 1000–3050 m. Mexico; Guat, Hond, Salv, CR; Col, Ven, Ec, Peru, Bol, Arg.

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