ABSTRACT
C. Chr. & Ching, Bull. Fan Mem. Inst. Biol., Bot. 5: 129. 1934. Holttum, Rev. FI. Malaya 2: 529. 1955. Sledge, Kew Bull. 27(3): 423. 1972. id., Bot. J. Linn. Soc. 84: 18. 1982. Kramer et al. in Kubitzki (ed.), Fam. Gen. Vase. Plants 1: 128. 1990. Holttum., FI. Males., Ser. 2, 2(1): 4. 1991. Type species: Pteridrys syrmatica (Willd.) C. Chr. & Ching (based on Aspidium syrmaticum Willd.)
Rhizome short, erect or suberect. Scales firm., narrow, entire with cordate base, multicellular hairs present with the scales and variously on the fronds. Lamina simple-pinnate; pinnae deeply lobed, lobes ± crenate or dentate. Veins all free, once or twiced forked, basal basiscopic vein in each lobe springing from the base of costule, basiscopic branch of basal acroscopic vein passing to a tooth in the sinus between two lobes, tooth projecting out of the plane of the lamina; unicellular glands absent on lamina and from sporangium stipes. Sori on acroscopic branch of each vein, terminal or subterminal. Indusia reniform., sometimes asymmetric.
