UW Burke Herbarium species comparison

Leaves opposite, glabrous, the largest on short, sterile shoots, serrulate or nearly entire, short-petiolate, the blades elliptic, 1.5-3.5 cm. long and 6-14 mm. wide;

leaves of the flowering shoots less crowded, smaller, sessile and entire.

Leaves opposite, thick and firm, the basal leaves tufted, oblanceolate, up to 15 cm. long and 2 cm. wide;

cauline leaves sessile and clasping, progressively shorter and broader upward.

Inflorescence racemose, few-flowered and crowded, glandular, the simple pedicels opposite and axillary;

calyx 5-12 mm. long, the 5 segments thin and lanceolate;

corolla bright purple to deep blue-violet, 30-38 mm. long, about 1 cm. wide at the mouth, keeled on the back, glabrous outside and with long, white hairs near the base of the lower lip within;

anthers long-wooly, pollen sacs opposite;

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

Inflorescence of rather dense verticillasters, the bracts subtending the lower verticillasters broad and leafy, the upper ones reduced;

calyx deeply 5-parted, the segments lanceolate, entire;

corolla bright blue, tubular, 14-21 mm. long, the tube expanded toward the end;

pollen sacs glabrous, dehiscent throughout and becoming opposite, 0.8-1.2 mm. long;

staminode (sterile stamen) usually yellow-bearded for about 1 mm. toward the tip.

Capsule

Capsule 7-12 mm. long, excluding the slender beak, which is up to 5 mm. long.