The Collaborative International Dictionary
Quinquefarious
Quinquefarious \Quin`que*fa"ri*ous\, a. [From L. quinque five:
cf. F. quinqu['e]fari['e]. Cf. Bifarious.] (Bot.)
Arranged in five vertical rows; pentastichous.
--Gray.
Wiktionary
quinquefarious
a. (context botany rare English) Arranged in five vertical rows.