UW Burke Herbarium species comparison

Leaves opposite, sessile and clasping, elliptic-ovate to elliptic-oblong, 2-10 cm. long and 0.7-5 cm. wide, sharply serrate to entire.

Leaves opposite, elliptic to ovate or obovate, 1-2.5 mm. long and 5-14 mm. wide, glabrous, entire.

Inflorescence of many-flowered racemes on long peduncles arising in the leaf axils;

calyx of 4 highly variable sepals;

corolla blue, rotate, 4-lobed, the upper lobe the largest, about 5 mm. wide;

style 1.5-2.5 mm. long;

pedicels up-curved, 3-8 mm. long;

stamens 2.

Inflorescence a terminal, bracteate raceme, the flowers pedicellate, at least the upper bracts alternate;

sepals 4, unequal;

corolla deep blue-violet, rotate, 8-13 mm. wide, 4-lobed, the upper lobe the largest;

style exerted, 6-10 mm. long;

stamens 2, filaments 4-8 mm. long.

Capsule swollen, 2.5-4 mm. high and wide, scarcely notched.

Capsule glandular-pubescent, somewhat notched, 4-6 mm. high, higher than wide.