Monographs Details: Lindsaea quadrangularis subsp. antillensis Raddi & K.U.Kramer
Authority: Mori, S. A., et al. 1997. Guide to the vascular plants of central French Guiana: Part 1. Pteridophytes, gymnosperms, and monocotyledons. Mem. New York Bot. Gard. 76: 1-422.
Description:Species Description - Fronds bipinnate, with terminal pinnule different from others; petiole pale brown, quadrangular; blade with 1-4 pairs of subopposite pinnae and a single terminal pinna, the pinnae ascending, the largest 9-25 x 1.5-3 cm, very gradually reduced toward apex; pinnules variable, round to quadrangular, in 15-40 alternate or subopposite pairs, slightly ascending, the largest 12-18 X 6 mm, the upper ones reduced. Sori continuous along margin. Scattered but common, in lowland forest understory on slopes, also found in cloud forest.