Plant: perennial herb; stems erect, 3-10 dm tall, branches mostly opposite Leaves: glabrous or hairy, ascending to spreading, narrowly elliptic, lanceolate to linear, larger ones (50-)60-100(-130) mm long, 5-25(-60) mm broad, the petioles 0-5 mm long INFLORESCENCE: cymose, terminal and axillary Flowers: calyx lobes ovate to lanceolate, mostly 1-2 mm long; corollas white, 2-3.5(-4) mm long, urceolate to cylindrical, the lobes erect Fruit: narrow, terete, 8-20 cm long; SEEDS numerous, comose Misc: Moist places at low altitides, oak woodlands and pine forests at middle altitudes; 450-2300 m (1500-7500 ft); May-Aug