65a. Inflorescence a dense
many-flowered spike; corolla
not 2-lipped;
petals rich purple...........................................................................
#57.
Prairie Clover.
Petalostemum emarginatum.
65b. Flowers axillary; corolla
2-lipped; petals pale purple to
lavender-white...............................................................................
#58.
Hedge Nettle.
Stachys crenata.