Five species of Serpocaulon are reported to grow on Santa Catarina Island (S. catharinae, S. latipes, S. meniscifolium, S. triseriale, and S. vacillans). I believe this collection is S. latipes because it is terrestrial, has a greenish rhizome (which is only slightly rugose when dry), and laminae that are pinnatisect and glabrous. However, I did not find scales at the costule bases (see image below). Labiak and Prado (New Combinations in Serpocaulon and a Provisional Key for the Atlantic Rain Forest Species. Amer. Fern J. 98:139–159 [2008]) state that there is a lot of variation in this species because it occurs in many habitats.