UW Burke Herbarium species comparison

Leaves opposite, the larger leaves crowded toward the base of the season\\\\'s growth on short, sterile shoots, the blades entire or toothed, up to 6 cm. long and 1.5 cm. wide, short-petiolate; flowering shoots with reduced and less-crowded leaves.

Leaves opposite, entire, thick and firm, the basal ones clustered, petiolate, up to 15 cm. long and 2 cm. wide, the blade oblanceolate to narrowly elliptic;

cauline leaves sessile and sometimes clasping, up to 2 cm. wide, 3.5-10 times as long as wide.

Inflorescence a short, few-flowered, bracteate raceme, with simple, axillary pedicels;

calyx 7-15 mm. long, with 5 lanceolate, long-acuminate segments;

corolla blue-lavender to light purplish, 30-50 mm. long, 1 cm. wide at the mouth, keeled on the back, glabrous outside, with long, white hairs on the base of the lower lip within;

anthers long-woolly, the pollen sacs wholly dehiscent and opening wide enough to form a plane;

staminode slender, shorter than the 4 fertile filaments, long-bearded toward the tip.

Inflorescence of numerous, loose verticillasters, sometimes one-sided;

calyx 4-8 mm. long, the 5 segments ovate, scarious margined, pointed;

corolla bright blue, 26-38 mm. long, 1 cm. wide at the mouth;

pollen sacs 1.9-3.0 mm. long, spreading, S-shaped, mostly glabrous, a short portion remaining indehiscent;

staminode usually glabrous.

Capsules 8-12 mm. long.

Capsule 9-12 mm. long.