serotine (adj.)

"late in occurrence or development," 1590s, from French sérotine, from Latin serotinus "that which comes late; that which happens in the evening," from sero, adverb of serus "late" (see soiree). Chiefly used of late-flowering plants. Also as a noun, a type of small, brown bat, from 1771. Related: serotinous, 1880, in botany, "appearing later in the season than usual" (Blount, 1656, has it as "that is in the evening, late, lateward"); serotinal.