Var. echinoides, Baker (A. echinoides, Jacobi. A. ensifórm is and A. Richardsii, Hort.). Dwarf and stiff: lvs. only 3%ft. long. 35. yuccaefolia, DC. St. short: lvs. 20–40, much nerved, linear and recurved, with a pale center, entire or nearly so. Mex.
Liberty Hyde Bailey, Wilhelm Miller, 1906