The Collaborative International Dictionary
Orthostichy
Orthostichy \Or*thos"ti*chy\, n.; pl. Orthostichies. [Ortho- + Gr. sti`chos row.] (Bot.) A longitudinal rank, or row, of leaves along a stem.
Wiktionary
orthostichy
n. (context botany English) A row of leaf along a stem