life
cycle - perennial, reproducing by seed
stems -
upright, 4-sided (edges round), branched above (branching opposite,
each then divide again - sometimes multiple), smooth or mostly
so growth
habit 1, growth
habit 2
leaves -
opposite, broadly ovate to lanceolate, base heart-shaped, margins
entire, smooth, petioled leaves
flowers -
5 fused petal-like sepals, sepals pink to purple and notched,
petals absent; subtended by cup-forming floral bracts, 1-5
per; terminal, drooping clusters floral bracts 1, floral bracts 2, flowers 1, flowers 2, flowers 3
seeds - oblong, hairy, brown, 5-ridged