Family

Davalliaceae

Nomenclature

Davallodes viscidula (Kuhn) Alderw., Bull. Jard. Bot. Buitenzorg, Ser. 2, 1: 6. 1911; Tagawa & K.Iwats., SouthE. Asian Stud. 5: 77. 1967; Holttum, Kew Bull. 27: 247. 1972; Tagawa & K.Iwats., Fl. Thailand 3: 157, f. 12.1. 1985; Nooteboom, Fl. Males., Ser. II, Ferns and Fern Allies 3: 273. 1998; Boonkerd & Pollawatn, Pterid. Thailand: 235. 2000. – Davallia viscidula Kuhn, Linnaea 36: 145. 1869. – Type: Blume 1451 (L holo), Java.

Description

Rhizome long creeping, about 1 cm diam., green and fleshy when living; scales ovoid with long, aciculate apex, about 13 by 2 mm, dark brown with pale ferrugineous margin in basal appressed ovoid portion, the tails patent. Stipes 6–22 cm long, green to stramineous with castaneous lower surface, densely hirsute and sparsely scaly, on scaly phyllopodia, 1 cm high. Laminae oblong, acute at apex, 26–70 x 16–45 cm, tripinnatifid; costae narrowly winged at upper portion; pinnae sessile, about 15 pairs, lower one to three pairs becoming smaller downwards, the largest ones patent, narrowly oblong with gradually narrowing or caudate apex, up to 13 by 5 cm; pinnules narrowly oblong, moderately acute, cuneate at base, sessile, more or less ascending; segments narrowly oblong, falcate, acute, lobed with several subdeltoid, acute lobes, herbaceous, light green, glabrous on laminar surface. Sori terminal on veinlets, at middle portion of lobes or basal acroscopic portion of segments; indusia pale brown, acuminate, glabrous .

Distribution in Thailand

PENINSULAR: Trang.

Wider Distribution

Sumatra, Java, Borneo, Sulawesi and New Guinea.

Ecology

On rather dry rocks in dense forests on ridges at about 800 m alt.

Proposed IUCN Conservation Assessment

Least Concern (LC). This species is widespread outside of Thailand and not under any known threat.