Monographs Details:
Authority:
Mickel, John T. & Smith, Alan R. 2004. The pteridophytes of Mexico. Mem. New York Bot. Gard. 88: 1-1054.
Mickel, John T. & Smith, Alan R. 2004. The pteridophytes of Mexico. Mem. New York Bot. Gard. 88: 1-1054.
Family:
Lindsaeaceae
Lindsaeaceae
Description:
Species Description - Rhizomes short- to long-creeping, 2–3 mm diam.; rhizome scales lustrous dark brown, lanceolate, 1–2x 0.3 mm; fronds 40–70 cm long; stipes ca. 1/2 the frond length, yellow-green to castaneous to atropurpureous, quadrangular in cross-section, glabrous; rachises at insertion of basal pinnae terete or slightly flattened abaxially; blades bipinnate; pinnae (1–)2–3(–5) pairs, segments arcuate, dimidiate, lacking midveins; sori 1–2 per segment; indusia continuous, 0.5 mm wide, margins entire; spores tetrahedral; 2n=ca. 168 (Oax), ca. 176 (Chis).
Species Description - Rhizomes short- to long-creeping, 2–3 mm diam.; rhizome scales lustrous dark brown, lanceolate, 1–2x 0.3 mm; fronds 40–70 cm long; stipes ca. 1/2 the frond length, yellow-green to castaneous to atropurpureous, quadrangular in cross-section, glabrous; rachises at insertion of basal pinnae terete or slightly flattened abaxially; blades bipinnate; pinnae (1–)2–3(–5) pairs, segments arcuate, dimidiate, lacking midveins; sori 1–2 per segment; indusia continuous, 0.5 mm wide, margins entire; spores tetrahedral; 2n=ca. 168 (Oax), ca. 176 (Chis).
Discussion:
Lindsaea trapeziformis Dryand. var. arcuata (Kunze) Baker in Martius, Fl. Bras. 1(2): 355. 1870. Lindsaea lancea (L.) Bedd. var. arcuata (Kunze) Rosenst., Hedwigia 46: 80. 1906. Type. Peru. Pampayaco, Poeppig 1133 (LZ, destroyed; isotype B!).
Lindsaea curvans Fe´e, Me´m. Foug. 5: 106. 1852. Type. Mexico. Oaxaca: Galeotti 6489 (P!).
Lindsaea galeottii Fe´e, Me´m. Foug. 5: 107. 1852. Type. Mexico. Oaxaca: Galeotti 6469 (P!).
For additional synonymy, see Kramer (1957).
Lindsaea arcuata is distinct by its entire indusia and terete rachises at insertion of basal pinnae. Most Mexican collections have segments twice as long as wide whereas Central American specimens have segments 3–3.5 times as long as broad