Prodromus of a fern flora for Bolivia. XXVI. Dennstaedtiaceae Author Schwartsburd, Pedro B. Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Av. P. H. Rolfs s. n., Viçosa, MG, Brazil, CEP 36570 - 900 Author Navarrete, Hugo Herbario QCA, Escuela de Ciencias Biológicas, Pontificia Universidad Católica del Ecuador, Av. 12 de Octubre 1076 y Roca, Quito, Ecuador. Author Smith, Alan R. University Herbarium, 1001 Valley Life Sciences Bldg. # 2465, University of California, Berkeley, CA 94720 - 2465 Author Kessler, Michael Department of Systematic and Evolutionary Botany, University of Zurich, Zollikerstrasse 107, CH- 8008 Zurich, Switzerland text Phytotaxa 2017 2017-12-22 332 3 251 268 http://dx.doi.org/10.11646/phytotaxa.332.3.2 journal article 10.11646/phytotaxa.332.3.2 1179-3163 Dennstaedtia cornuta (Kaulf.) Mett., Ann. Sci. Nat., Bot. , sér. 5, 2: 260. 1864 . Range:— Mountains from Mexico to Venezuela and Bolivia (CO, LP, SC); southeastern Brazil . Ecology:— Fairly common; terrestrial in humid forests; 900–2450 m . Notes:— Tryon (1960) and Tryon & Tryon (1982) recognized D. cornuta (as D. dissecta ) and D. dissecta (as D. obtusifolia ) as closely related, but suggested that they might be a single variable species. The two species are clearly distinguishable by characters of the rhizomes and blades. The segment shape in young leaves of Dennstaedtia cornuta and D. dissecta is quite similar, and this was a reason for other authors to unite the two species; however, the differences in rhizomes (ascendant and stilt roots in D. cornuta ) are constant, and so are the soral features of mature leaves ( Navarrete & Øllgaard, 2000 ); these features are also useful in separating D. cornuta from D. obtusifolia .