Davallia divaricata var. divaricata Blume, 1828
Description
Rhizome without the scales 10-15 mm in diametre, not white waxy (D. divaricata Rhizome). Scales brown or red-brown without pale border, narrowed evenly towards the apex, curling backward or not, not bearing multiseptate hairs, toothed, basifixed with cordate base and much overlapping lobes, 5-20 mm long by 2-4 mm broad. Stipes pale, adaxially grooved, 15-60 cm long, glabrous or with few scales. Lamina compound (D. divaricata Habitus), tripinnate towards base and in the middle part, deltoid and broadest towards base, glabrous, 60-100 cm long by 40-70 cm broad, not or slightly dimorphous. Longest petiolules 4-35 mm long. Pinnae deltoid. Longest pinnae 8-45 cm long by 5-30 cm broad. Pinnules of at least the larger pinnae anadromous, deltoid. Longest pinnules 70-200 mm long by 40-110 mm broad. Ultimate leaflets linear oblong or narrowly ovate, lobed halfway towards midrib or only shallowly lobed. Ultimate segments 5-27 mm long by 2-6 mm broad. Rachis adaxially distinctly grooved (often with a groove at either side). Upper ridge at the junction of the costa and pinna-rachis not swollen. Leaf axes glabrous. Margins of the lamina of each leaflet not thickened. Veins in sterile ultimate lobes pinnate (or forked in very narrow lobes), reaching the margin. False veins absent. Sori separate, borne several on a segment, at the forking point of veins. Indusium also attached along the sides, pouch-shaped, oblong, about as wide as long, 1 mm long by 1 mm broad, upper margin not elongated, truncate or slightly rounded, separated from or even with lamina margin (D. d. divaricata SEM, picture of indusia). Lamina generally extending into a tooth at both sides of a sorus.
Distribution
Continental Asia: Common from India to China (Yunnan, Fukien, Kwangsi, Guangdong, Hainan, Taiwan) southwards through Southeast Asia.
Malesia: Throughout.
Pacific: Bougainville (1 coll.).
Ecology
Generally epiphytic, sometimes epilithic on limestone, or bedrock not specified; rarely terrestrial. Mostly in dense forest, sometimes on dry places. Altitude 0-1850 m.