The World Flora Online

4. Pellaea sagittata (Cav.) Link, Fil. Spec. 60 (1841).

Por G. Yatskievych.

Pteris sagittata Cav., Descr. Pl. 267 (1802). Holotipo: México, Née s.n. (MA).

Rizoma 5-15 mm de diámetro, compacto, decumbente, quebradizo y blanco amiláceo internamente en estado fresco, las escamas concoloras, pardo-amarillentas a pardo-anaranjadas, esparcidamente pectinadas, tortuosamente atenuadas en el ápice; hojas 15-80 cm, ligeramente dimorfas; pecíolo y raquis teretes o aplanados adaxialmente, no flexuosos, pajizos a pardo claro, frecuentemente se oscurecen algo con la edad, generalmente puberulentos, opacos, el pecíolo deciduamente escamoso cerca de la base; lámina ovada a ovado-triangular, 2(-3)-pinnada; pínnulas (0.4-)0.7-4 cm, pediculadas, ovado-triangulares a sagitadas, glabras o puberulentas en el envés, el pedículo hasta 9 mm; pínnulas fértiles ligeramente más angostas que las pínnulas estériles; esporas 32 por esporangio. Grietas de afloramientos rocosos en pendientes pronunciadas y taludes de los caminos. Ch (Breedlove 40463, MO); G (Skutch 805, GH). 1700-2700 m. (NO. México a Guatemala, Colombia, Ecuador, Perú, Bolivia.)

Pellaea sagittata es un triploide apogámico con 2n=87, como lo verifican recuentos de México (Tryon y Britton, 1958). Véase la discusión de P. cordifolia para la comparación con esta especie.

Rocky slopes in pine-oak woods; 1350–3050 m. USA (Tex); Mexico, Guat, Pan; Col, Ec, Peru, Bol. Rocky slopes in pine-oak woods; Centro, Etla, Ixtlán, Mixe, Pochutla, Sola de Vega, Teposcolula, Tlacolula, Tlaxiaco; 1350-2500 m. Mexico (Chih, Zac, Jal, Mich, Mex, DF, Mor, Tlax, SLP, Hgo, Pue, Oax, Chis); US (Tex); Guat to Pan; Col to Bol. Rocky slopes in pine-oak woods; Centro, Etla, Ixtlán, Mixe, Pochutla, Sola de Vega, Teposcolula, Tlacolula, Tlaxiaco; 1350-2500 m. Mexico (Chih, Zac, Jal, Mich, Mex, DF, Mor, Tlax, SLP, Hgo, Pue, Oax, Chis); US (Tex); Guat to Pan; Col to Bol.

Rhizomes short, stout, compact; rhizome scales 3–4 x 0.5–0.8 mm, straight, light brown, concolorous, dull, linear-lanceolate to lanceolate, irregularly denticulate; fronds to 80 cm long, erect; stipes 1/4–1/2 the frond length, nearly terete to plane on adaxially, stramineous, with narrow orange scales toward the base, otherwise glabrous or rarely sparsely puberulous, rachises straight; blades narrowly oblong to deltate, 1–2-pinnate, light green, yellow-green to gray-green; pinnae widely spreading to slightly ascending, entire to pinnate, segments short-stalked, 20–28 x 8–14 mm at base, narrowly deltate to sagittate, entire, cordate at bases, apices acute, subcoriaceous, glabrous to sparsely pubescent at pinna bases with scattered hairs and scales, terminal pinnule of each pinnae with strongly inequilateral base (1–1.5 mm difference); margins recurved, glabrous, with whitened cells on recurved portion, indusia well differentiated, 0.3–0.5 mm wide, papillate; spores brown; n =2n=87, apogamous (Mich). Rhizome short, stout, compact; rhizome scales 3-4 mm long, 0.5-0.8 mm wide, light brown, concolorous, dull, linear-lanceolate to lanceolate, irregularly denticulate; fronds to 80 cm long, erect; stipe the frond length, nearly terete to plane on upper surface, stramineous, with narrow orange scales toward the base, otherwise glabrous or rarely sparsely puberulous, rachis straight; blade narrowly oblong to deflate, pinnate to bipinnate, light green, yellow-green to gray-green; pinnae widely spreading to slightly ascending, entire to pinnate, segments short-stalked, 20-28 mm long, 8-14 mm wide at base, lanceolate or sagittate, entire, cordate at base, apex acute, subcoriaceous, glabrous to sparsely pubescent at pinna base with scattered hairs and scales, terminal pinnule of pinnae with strongly inequilateral base (1-1.5 mm difference); veins evident, free; margin recurved with whitened cells on recurved portion, indusium well-differentiated, 0.3-0.5 mm wide, papillate; spores brown. Rhizome short, stout, compact; rhizome scales 3-4 mm long, 0.5-0.8 mm wide, light brown, concolorous, dull, linear-lanceolate to lanceolate, irregularly denticulate; fronds to 80 cm long, erect; stipe the frond length, nearly terete to plane on upper surface, stramineous, with narrow orange scales toward the base, otherwise glabrous or rarely sparsely puberulous, rachis straight; blade narrowly oblong to deflate, pinnate to bipinnate, light green, yellow-green to gray-green; pinnae widely spreading to slightly ascending, entire to pinnate, segments short-stalked, 20-28 mm long, 8-14 mm wide at base, lanceolate or sagittate, entire, cordate at base, apex acute, subcoriaceous, glabrous to sparsely pubescent at pinna base with scattered hairs and scales, terminal pinnule of pinnae with strongly inequilateral base (1-1.5 mm difference); veins evident, free; margin recurved with whitened cells on recurved portion, indusium well-differentiated, 0.3-0.5 mm wide, papillate; spores brown.