Davallodes viscidulum (Mettenius, 1869) Alderwerelt, 1911b
Description
Rhizome without the scales 5-7 mm in diametre (D. viscidulum Rhizome). Scales nearly black, with pale border from base to apex, or with pale border quickly diminishing or disappearing towards the apex, flat and nearly acicular, lacking marginal setae or setae rare, basifixed with cordate base and much overlapping basal lobes, 6-12 mm long. Stipes 6-22 cm long. Lamina compound (D. viscidulum Habitus), pinnate with strongly dissected pinnae, or (usually) bipinnate towards base and in the middle part, bearing multicellular hairs, 26-70 cm long by 16-45 cm broad; lower pinnae not very small, usually about one third to about as long as longest; hairs between veins on either surface absent or nearly so (a few scattered hairs present). Longest petiolules 1 mm long. Longest pinnae 8-18 cm long by 2.5-6 cm broad. Longest pinnules or pinnalobes 15-32 mm long by 3-10 mm broad. Hairs on leaf axes 0.2-0.5 mm long. Indusium scale-like, attached at the narrow, cordate base only, semicircular or oblong, longer than wide, or rarely about as wide as long, 0.5-1 mm long by 0.3-0.5 mm broad (D. viscidulum Indusia).
Distribution
Continental Asia: Thailand (Trang, Khao Chong 1 coll.).
Malesia: Sumatra (Acèh 2 coll., W. Coast, G. Kerinci 2 coll., Bengkulu 2 coll.); Java (throughout many coll.); Bali (2 coll.); Southwestern Sulawesi (2 coll.).
Ecology
Epiphytic and terrestrial, also on dry places. Altitude 100-2000 m, mostly at higher altitudes.
Note
A sterile collection from Thailand, M. Tagawa c.s. T 5565, Nakawn Sri Tamarat, probably belongs to this species.