pentastichous

pentastichous

(pɛnˈtæstɪkəs)
adj
1. (Botany) (of plant leaves) arranged in five vertical rows
2. (Botany) (of a plant) having the leaves arranged in five vertical rows
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014