life
cycle - annual, reproducing by seed
stems - upright, very tall, smooth, hollow, purplish coloration growth habit
leaves -
opposite or whorled (3), oblong to narrowly ovate, sharply
toothed, petiole base with stalked glands leaves 1, leaves 2, leaves 3
flowers -
5-petaled (2 lateral pairs fused, 5th petal notched), blue
or purple to pink or sometimes white; solitary, elongated stalks,
axillary flowers 1, flowers 2, flowers 3, flowers 4, flowers 5, flowers 6, flowers and seedpods
seedpods - capsules, dehiscent when mature seedpods
