UW Burke Herbarium species comparison

Basal leaves opposite, clustered, petiolate, with ovate to sub-cordate blade up to 10 cm. long and half as wide, about equaling the petiole, serrate, hairy like the stem, especially along the mid-vein beneath;

cauline leaves sessile and clasping, more sharply serrate, nearly as large, but more broadly oblong, the upper ovate.

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 large and open, strongly glandular-hairy;

calyx 3-5 mm. long, broadly lanceolate, with parallel veins;

corolla blue, 15-22 mm. long, glandular-hairy on the outside, the raised portion of the lower petal pale blue and hairy;

corolla strongly bilabiate, the lower lip much the longer;

pollen sacs 0.8-1.1 mm. long, fully dehiscent and becoming opposite, nearly glabrous;

staminode bearded toward the recurved 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 4-6 mm. long.

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