life
cycle – annual
or sometimes weak perennial, reproducing by seed
stems – upright,
tall, branches ascending, green, smooth or with minute hairs
growth habit 1, growth habit 2
leaves – alternate,
short-stalked, oblong-oval to lanceolate, margins entire to
strongly waved or deeply lobed, minute yellow glands, reduced
above, strong unpleasant odor leaves 1, leaves 2
flowers - 5-sepaled, petals absent, greenish, small, densely
clustered compound spike, long and slender; terminal and axillary
flowers