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 Adiantum ornithopodum C.Presl ex Kuhn, Linnaea 36: 74. 1869 . Range: — Bolivia (SC) and Brazil . Ecology: —Rare (2 collections known), terrestrial in lowland disturbed forests; 400 m . Notes: —Most closely related to a group of southern Brazilian species with blades pedate at bases and with few or inconspicuous idioblasts: A. abscissum Schrad. , A. curvatum Kaulf. , and A. pentadactylon Langsd. & Fisch. Rhizomes short-creeping; rachises glabrous or with very few scattered articulate hairs; blades 2-or 3-forked, 3-or 4-pinnate proximally and 2-pinnate distally; pinnules 2–2.5 times longer than wide, 7–15 pairs per pinna, reduced toward pinna bases and apices, not articulate, stalked to 1 mm , pinnules glabrous on both surfaces, margins of sterile pinnules incised to lobate, irregularly serrate, indusia, oblong, glabrous.