Eriosorus cheilanthoides (Sw.) A.F.Tryon, Brit. Fern Gaz.

Kessler, Michael, Smith, Alan R. & Prado, Jefferson, 2017, Prodromus of a fern flora for Bolivia. XXVII. Pteridaceae, Phytotaxa 332 (3), pp. 201-250 : 219-220

Eriosorus cheilanthoides (Sw.) A.F.Tryon, Brit. Fern Gaz. 9: 271. 1966.

= Jamesonia cheilanthoides (Sw.) Christenh., Phytotaxa 19: 20. 2011.

Range: — Ecuador to Bolivia (CO, LP, SC); southeastern Brazil; Tristan da Cunha Islands.

Ecology: —Very common; terrestrial in humid regions among rocks or shrubs, often along roadsides; 2200–4050 m.

Notes: —Blades narrow, linear, 1-pinnate to 1-pinnate-pinnatisect; pinnae nearly as long as broad; ultimate segments deeply bifid, each lobe with 1 or 2 veins; blade apices extended or somewhat curled. This specis can be difficult to distinguish from E. elongatus but generally has narrower segments and less conspicuously curled blade apices. The putative hybrid between E. cheilanthoides and E. elongatus , E. × flabellatus (Hook. & Grev.) Copel. , shares characters of both species, and, due its variability, may be difficult to identify. Several collections are known from Bolivia (CO, LP, SC), from 2100–3600 m. This hybrid can usually be recognized by the combination of ascending, deeply divided pinnae and only 1 or 2 veins per segment, slightly flexuous rachises, and often slightly curled blade apices. It can be expected wherever the suspected parents co-occur. Whether this putative hybrid has malformed spores or not, as usually found in fern hybrids, is unknown.