act in i opter is

[Gr. ἀκτίς ( aktis ), gen it, ἀκτῖνος ( aktinos ) = ray; πτέρις ( pteris ) = a fern.] A genus of ferns belonging to the order Polypod i aceæ. The species resemble minute palms, with fan-shaped fronds. Α. radiata is from India and Africa, and A. australis is from Africa.