Bommeria hispida (Mett.) Underw.

  • Authority

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

  • Family

    Pteridaceae

  • Scientific Name

    Bommeria hispida (Mett.) Underw.

  • Description

    Species Description - Rhizomes long-creeping; rhizome scales linear-lanceolate, orange-tan, 1.5–2 mm; fronds (2–)7–10(–40) mm apart; stipes 4– 20 cm long, 3/4–4/5 the frond length, light grayish brown, terete to flattened adaxially, scaly and hairy at bases, mostly sparsely hairy, densely so near blade bases; blades 2–6 x 2.5–8 cm, pentagonal, pedately divided, bipinnatifid, the basal pinna pair deeply pinnatifid with greatly exaggerated basiscopic pinnatifid pinnules, the distal pinnae pinnatifid, rachises dilated laterally between the pinnules, or some forming entire rounded foliaceous lobes between pinnae; blade surfaces densely hispid adaxially, with stiff, unicellular, acicular hairs 1 mm long, the abaxial surfaces bearing similar (but mostly curled) hairs in addition to tan lanceolate scales 0.2–0.5 mm wide on the rachises and midveins; sori along the distal half of veins, the pinnule margins often slightly incurved; veins free, obscure; spores tan, 64 per sporangium; 2n=60 (Jal, USA).

  • Discussion

    Gymnogramma hispida Mett. ex Kuhn, Linnaea 36: 72. 1869. Gymnopteris hispida (Mett.) Underw., Native Ferns, ed. 6, 84. 1900. Type. U.S.A. Texas: Pass of the Limpia, Wright 819 (B; isotypes GH!, MO!, NY!, US!, YU!).

    Bommeria schaffneri E. Fourn., Bull. Soc. Bot. France 27: 327. 1880. Type. Mexico. In montibus Escabrillos prope San Luis Potosi´, 1877, Schaffner 6 (P; GH photo, US photo!).

    Gymnogramma ehrenbergiana Klotzsch var. muralis Pringle ex Davenp., Bot. Gaz. 19: 392. 1894. Type. Mexico. Jalisco: on faces of cliffs near Tequila, Pringle 4420 (GH, not found; isotypes BM!, BR!, F, GH!, K!, MEXU!, MSC, TEX!, UC!, US!, VT).

    This species is distinct by its small size, long acicular hairs, and free veins.

  • Distribution

    Terrestrial on shady rock bases, oak forests; pineoak forests, matorral, eroded volcanic rocks, base of sandstone cliffs; 1500–2300(–3000) m. Sw USA (Ariz, N Mex, Tex); Mexico.

    Mexico North America| Arizona United States of America North America| New Mexico United States of America North America| Texas United States of America North America|