Campyloneurum, Presl, 1836

León, Blanca & Kessler, Michael, 2013, Campyloneurum poloense (Polypodiaceae), a new combination and lectotypification for a Bolivian fern, Phytotaxa 119 (1), pp. 59-60 : 60

Key to the species of Campyloneurum from Dept. La Paz, Bolivia

1. Rhizome diameter 3–5 mm; rhizome scales usually> 1.5 mm wide; 2–5 series of areoles between costa and margin. ............................................................................................................................................................. C. amphostenon

– Rhizome diameter 1–3 mm; rhizome scales usually <1.5 mm wide at the base; 1–3 series of areoles between costa and margin..................................................................................................................................................................... 2

2. Rhizome scales narrowly ovate without differentiated margins, with wide oblong cells, the cell lumina iridescent .... .................................................................................................................................................................. C. aglaolepis

– Rhizome scales linear-lanceolate with differentiated margins, with oblong or narrowly oblong cells, the cell lumina not iridescent. ................................................................................................................................................................ 3

3. Laminae shortly decurrent at the bases, abruptly ending in obtuse apices ................................................. C. poloense

– Laminae gradually ending in both ends, acute or acuminate....................................................................................... 4

4. Rhizome scale bases> 1 mm wide, scales brown in mass .................................................................. C. angustifolium

– Rhizome scale bases <1 mm wide, linear-lanceolate, scales dark brown in mass. ........................ C. angustipaleatum