Cystopteris Cystopteris, (Lam.) Desv.

3. C. montana (Lam.) Desv. View in CoL , Mém. Soc. Linn. Paris 6: 264 (1827).

Rhizome c. 2 mm in diameter, creeping, little-branched, with a few scattered scales on the younger parts. Leaves 10- 40 cm, solitary, 3-pinnate; petiole 1-2 times as long as lamina; lamina deep green, more or less thinly glandular, deltatepentagonal; pinnae up to c. 10 cm, subopposite, subsessile, obliquely triangular-ovate, acute, the lowest pair the longest; pinnules up to c. 5 cm, the proximal basiscopic pair the longest; ultimate segments up to c. 10 mm, ovate to oblong, more or less acute, pinnately divided. Indusium suborbicular, often glandular, caducous; spores muricate. 2« = 168. Mountain woods, usually on basic rocks. N. & C. Europe, extending southwards to the Pyrenees and C. Jugoslavia. Au Be Br Cz Da Fe Ga Ge He Hs It Ju No Po Rm Rs (N, C, W) Su.