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 or elliptic-ovate, narrowed to a short petiole, 1.5-5 cm. long and 0.6-3 cm. wide, finely serrate

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 of spike-like racemes on long peduncles arising from the leaf axils;

pedicels 1-2 mm. long, surpassed by the small, alternate, subtending bracts;

calyx of 4 sepals;

corolla light blue, sometimes with lavender stripes, 4-8 mm. wide, rotate, 4-lobed;

style 2.5-4.5 mm. long;

stamens 2.

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

Capsule 4 mm. high, broadly triangular-cordate, nearly truncate.