1. Parahemionitis cordata (Burman f.), Panigrahi, Abstr. & Souv. Nation. Symp. Curr. Trends Pterid. Palayamkottai. 13. (1991). nom. cons.
泽泻蕨 ze xie jue
Parahemionitis cordata (Roxburgh ex Hooker & Greville) Fraser-Jenkins, New Sp. Syndr. Indian Pteridol. 187. 1997.
Hemionitis cordata Roxburgh ex Hooker & Greville, Icon. Filic. 1: t. 64. 1828; Gymnogramma sagittata (Fée) Ettingshausen; H. sagittata Fée; H. toxotis Trevisan.
Rhizomes erect, short; scales brownish, narrowly lanceolate. Stipe of fertile frond much longer than that of sterile frond (more than 2-3 × length in dense forests, ca. 1 × in dry shrublands), 6-18 cm × ca. 1 mm; lamina abaxially brown, adaxially brownish green, ovate, narrowly ovate, or hastate, 3-6(-10) × 2-4(-6) cm, forming an oblique angle with stipe, herbaceous when dry, abaxially with sparse, small subulate scales (scales rather dense along main vein), adaxially glabrous, base strongly cordate, margin with sparse, reddish brown, jointed hairs, apex obtuse or rounded. Sori brown, following course of veins, confluent throughout abaxial surface when mature. 2n = 120.
Wet soil and rock crevices of stream valleys in dense forests, shrublands, slopes; below 1000 m. Hainan, SW Taiwan, S Yunnan (Menghai) [Cambodia, India, Laos, Malaysia, Philippines, Sri Lanka, Thailand, Vietnam].
Parahemionitis cordata used to be called Hemionitis arifolia (N. L. Burman) T. Moore or P. arifolia (N. L. Burman) Panigrahi (based on Asplenium arifolium N. L. Burman), but the type of the latter is in fact Acrostichum aureum, following Morton (Contr. U.S. Natl. Herb. 38: 283-396. 1974).
