Description: English: Location taken: Merrifield Garden Center, Fairfax VA USA. Names: Selaginella rupestre, Spike Moss, Stirrup shel Classification: Plantae > Tracheophyta > Lycopodiopsida > Selaginellales > Selaginellaceae > Selaginella > Selaginella rupestre. Date: 4 September 2006. Source: source: David Stang. First published at ZipcodeZoo.com. Author: Photo by David J. Stang.