Prodromus of a fern flora for Bolivia. XXVII. Pteridaceae Author Kessler, Michael Systematic Botany, University of Zurich, Zollikerstrasse 107, CH- 8008 Zurich, Switzerland Author Smith, Alan R. University Herbarium, 1001 Valley Life Sciences Bldg. # 2465, University of California, Berkeley, CA 94720 - 2465 Author Prado, Jefferson Instituto de Botânica, Av. Miguel Estéfano, 3687, CEP 04301 - 902, São Paulo, SP, Brasil text Phytotaxa 2017 2017-12-22 332 3 201 250 http://dx.doi.org/10.11646/phytotaxa.332.3.1 journal article 10.11646/phytotaxa.332.3.1 1179-3163 Pteris inermis (Rosenst.) de la Sota, Darwiniana 17: 99. 1972 . = Pteris muricata Hook. var. inermis Rosenst., Repert. Spec. Nov. Regni Veg. 11: 53. 1912 . Range: — Argentina and Bolivia (CO, LP). Ecology: —Uncommon; in wet and cloudy forests; (1300–) 3000–3400 m . Notes: —Blades ternate, 2-pinnate-pinnatifid (3-pinnate-pinnatifid at bases), proximal pinnae pedicellate, the petiolules ( 1–9 cm long), not winged; veins free; awns present on costae adaxially. Closely related to P. deflexa , agreeing in the pedate blade architecture but differing in the stramineous spines on the costae and costules.