Hypolepis, Bernhardi, 1806

Arana, Marcelo D., Yañez, Agustina & Schwartsburd, Pedro B., 2014, An updated synopsis of Hypolepis Bernh. (Dennstaedtiaceae) from Argentina, Phytotaxa 188 (2), pp. 91-102 : 93

Key to the taxa of Hypolepis in Argentina

1. Laminae deltoid to triangular, basal pinnae equilateral, pseudoindusia absent or, if present, not ciliate. ........................................ 2

- Laminae rhombic, basal pinnae strongly inequilateral, pseudoindusia ciliate. ................................................................................ 3

2. Rachises, costa and costules with capitate, glandular catenate hairs, pinnules with rounded lobes at the margin. ............................ ............................................................................................................................................................................ Hypolepis poeppigii

- Rachises, costae and costules with acicular (non capitate) and glandular catenate hairs, pinnules with acute lobes at the margin. .. ............................................................................................................................................. Hypolepis rugosula subsp. poeppigiana

3. Fronds 0.2–0.8 m long. Last pinnules narrowly lanceolate to linear, 2–5 × 8–15 mm, those of the distal pinnae sometimes falcate, usually with acute lobes at the margin and apex. Laminar tissue abaxially with abundant catenate-acicular hairs. .......................... ................................................................................................................................................... Hypolepis stolonifera var. delasotae

- Fronds 1.2–2 m long. Last pinnules oblong to broadly ovate, 8–15 × 25–30 mm, usually with rounded lobes at the margin and apex. Laminar tissue abaxially glabrous. ............................................................................... Hypolepis stolonifera var. stolonifera