Prodromus of a fern flora for Bolivia. III. Selaginellaceae Author Smith, Alan R. University Herbarium, 1001 Valley Life Sciences Bldg. # 2465, University of California, Berkeley, CA 94720 - 2465 Author Kessler, Michael Systematic Botany, University of Zurich, Zollikerstrasse 107, CH- 8008 Zurich, Switzerland text Phytotaxa 2018 2018-03-16 344 3 248 258 http://dx.doi.org/10.11646/phytotaxa.344.3.5 journal article 10.11646/phytotaxa.344.3.5 1179-3163 Selaginella marginata (Humb. & Bonpl. ex Willd.) Spring , Flora 21: 194. 1838 . Range: — Mexico to Venezuela ; Bolivia (BE, LP, SC) and Brazil to Uruguay and northern Argentina . Ecology: —Common; terrestrial and on rocks, forming colonies, with creeping stems bearing erect or suberect “fronds”, in semihumid forests and forest edges; to 1200 m . Notes: —Distinguished from similar articulate species by having a single large peltate auricle (vs. one or sometimes two lateral smaller auricles) at the base of each medial leaf and by the whitish margins on the medial and lateral leaves (vs. greenish).