Systematic Classification:
Division : Angiospermae
Class : Dicotyledons
Order : Polypodiales
Family : Pteridaceae
Genus : Adiantum
Species : concinnumGeneral Information:
Terrestrial herb. Rhizome erect or suberect, up to 2 cm thick, densely scaly at the apex, scales lanceolate, up to 4 x 0.5 mm, acuminate, margin entire. Stipes tufted, up to 28 cm long, 2.5 mm thick, slender, dark brown. Lamina oblong-lanceolate, 30-40 x 20-25 cm, bipinnate or tripinnate, apex acute, base broadly cuneate; primary pinnae up to 10 pairs, slightly ascending or spreading, alternate, lanceolate, 10-15 x 3-4 cm, apex acute with a terminal pinnule, base broadly cuneate, secondary pinnae ovate or oblong-deltoid, 3-4 x 1.5-2 cm, apex acute with a terminal pinnule, base oblique; pinnules alternate, shortly stalked, fan-shaped, suborbicular, ovate or wedge-shaped, 1.5 x 1.5 cm, base truncate or narrowly or broadly cuneate or acroscopic base truncate, basiscopic base slightly excised and narrowly cuneate, margin deeply lobed into two or three primary lobes which are again shallowly lobed; veins slightly distinct above and below, repeatedly, flabellately forked, free, reaching the margin; pinnae pale green or dark green, glabrous above and below; texture thin herbaceous. Sori distributed all along them argin of the pinnule except acroscopic and basiscopic bases, reniform, up to 1 mm across; indusia reniform, glabrous, pale brown, papery; spores tetrahedral, deltoid in polar view, 30 x 25 um, pale brown with smooth exine.
Economic Importance:
- Not evaluated