|Pteridophyte|| Literature for Sadleria squarrosa
Common name(s): `ama`u, `ama`uma`u, ma`u, ma`uma`u, pua`a `ehu`ehu, `apu`u
|Distribution||Hawaiian Islands.In the Hawaiian Islands, endemic to Kaua`i, O`ahu, Moloka`i, Lana`i, Maui, Hawai`i.|
|Habitat||Steep, dark, damp banks near streams|
||Terrestrial, small to medium-sized; rhizomes decumbent.
||Fronds drooping, 15-32 cm long; stipe 4-5+ mm diameter at base, dark, thickly covered with scales along entire length, scales linear-triangular, elongate, light to dark brown to reddish brown with marginal glandular hairs; blade 2-pinnate, lanceolate-ovate, leathery, 15-35(-70) cm long; rachises heavily clothed with scales throughout; pinnae 8-36 pairs, linear-lanceolate, tips acute, 1.8-11 cm long, shorter basally; ultimate segments 12-25+ pairs per pinna, adnate, ovate to ovate-lanceolate, 0.3-0.6 cm long, concave abaxially, slightly contracted at base, tips acute to rounded, margin with glandular hairs; veins obscure.
||Sori 2 per segment, 1-3 mm long; indusia firm.
||Latin squarrosus, rough with scales, in reference to the very scaly stipe and rachis.