Monographs Details: Adiantum fragile var. rigidulum (Mett. ex Kuhn) Proctor
Authority: Proctor, George R. 1989. Ferns of Puerto Rico and the Virgin Islands. Mem. New York Bot. Gard. 53: 1-389.
Family:Pteridaceae
Description:Distribution and Ecology - General Distribution. Jamaica ? (reported by General Distribution. Jamaica ? (reported by Distribution in Puerto Rico. O f wide occurrence; recorded from Arecibo, Bayamon, Carolina, Catano, Guaynabo, Lares, Mayagiiez, Ponce, San Sebastian, Vega Alta, and Vega Baja; also Vieques. Virgin Islands. St. Croix, St. Thomas, and St. John.Habitat. Similar to that of var. fragile, but only at lower elevations (20-325 m), common.

Discussion:

Basionym. Adiantum rigidulum Mettenius ex Kuhn, Linnaea 36: 76. 1869.

Type. Collector not stated, from "Ins. St. Cruce et St. Thomas" [Virgin Islands] (B, fragm. US).

Distribution:Jamaica South America| Puerto Rico South America| Virgin Islands South America|