Gymnocarpium robertianum, (Hoffm.) Newman

Tutin, T. G., Heywood, V. H., Burges, N. A., Moore, D. M., Valentine, D. H., Walters, S. M. & Webb, D. A., 1964, Flora Europaea - Volume 1. Lycopodiaceae to Platanaceae, Cambridge University Press : 22

2. G. robertianum (Hoffm.) Newman , Phytologist 4: 371 (1851)

( Dryopteris robertiana (Hoffm.) C.Chr. , Phegopteris robertiana (Hoffm.) A. Braun , Polypodium robertianum Hoffm. , Lastrea robertiana (Hoffm.) Newman , Nephrodium robertianum (Hoffm.) Prantl ).

Very like 1, but leaves usually 15-60 cm, rolled up when young to form a single ball; petiole sparsely glandular below but increasingly glandular towards apex; lamina not obviously deflexed, dull green, with shortly-stalked glands on rhachis, veins and under surface; each of lowest pair of pinnae smaller than rest of lamina. 2/7=160-168. Limestone rocksand Screes, in less shaded situations than 1. Most o f Europe, but usually local, and absent from considerable areas; rare in the Mediterranean region. Al Au Be Br Bu Co Cz Fe G a Ge G r Hb He H o Hs H u It Ju No Po Rm Rs (N, B, C, W, K) Su.