Lindsaea lancea (L.) Bedd.
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Authority
Mickel, John T. & Smith, Alan R. 2004. The pteridophytes of Mexico. Mem. New York Bot. Gard. 88: 1-1054.
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Family
Lindsaeaceae
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Scientific Name
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Description
Species Description - Rhizomes short- to long-creeping, 1.5–3 mm diam.; rhizome scales lustrous, dark brown, lanceolate, 1–2 x 0.3 mm; fronds clumped, 10–50 cm long; stipes 1/3–1/2 the frond length, yellowish to dark brown especially at bases, angular; rachises at insertion of basal pinnae sharply angular abaxially; blades 1–2-pinnate; pinnae 10–20(–35) cm long, pinnae or pinnules subtrapezoidal, lunulate to subfalcate, glabrous; veins free, 2-forked; sori continuous on segment margins; indusia continuous, 0.2–0.5 mm wide, margins entire, 2n =82–88 (Trin).
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Discussion
Adiantum lanceum L., Sp. Pl., ed 2, 2: 1557. 1763. Type. Seba, Thes. 2: t. 64, f. 7, 8, 1735, based on a specimen from Surinam.
Lindsaea falcata Dryand., Trans. Linn. Soc. London 3: 41, t. 7, f. 2. 1797.
Lindsaea lancea (L.) Bedd. var. falcata (Dryand.) Rosenst., Hedwigia 46: 79. 1906. Type. French Guiana, Aublet s.n. (BM, photo US).
Lindsaea imbricata Liebm., Mexic. Bregn. 269 (reprint 117). 1849, hom. illeg., non Desv., 1811. Lectotype (chosen by Smith, 1981: 140). Mexico. Oaxaca: San Pedro Tepinapa, Liebmann s.n. [Pl. Mex. 2447, Fl. Mex. 450 (annotated by Kramer as holotype)] (C!, photos US!). Other syntype is Fl. Mex. 450a. For additional synonymy, see Kramer (1957).
Unverified, Doubtful, or Mistaken Reports. Gro (Lorea 2884, FCME, cited by Lorea-Herna´ndez & Vela´zquez M., 1998, but not verified). Lindsaea lancea is the most common species of the genus in Mexico and distinct by its somewhat falcate pinnae/pinnules and the distal pinnules of a pinna being only slightly reduced. Frond dissection is too variable to distinguish var. falcata (1-pinnate) from other material in Mexico. Nearly half the specimens are 1- pinnate, with some specimens having both 1-pinnate and 2- pinnate fronds.