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, sharply toothed or entire, the basal ones 10-35 cm. long and 2.5-9 cm. wide, petiolate, the blade lanceolate to elliptic; lowermost cauline leaves reduced, the others well-developed, sessile and often clasping, broadly lanceolate to rotund-ovate, 4-12 cm. long and 2-5 cm. wide.

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 several verticillasters;

calyx 9-15 mm. long, the 5 segments narrow and herbaceous;

corolla blue-lavender, strongly glandular-hairy outside, glabrous inside, 28-40 mm. long, over 1 cm. wide at the mouth;

anthers permanently horseshoe-shaped, 1.7-2.3 mm. long;

pollen sacs dehiscent across their apices, the lower part saccate and indehiscent, glabrous;

staminode glabrous, the tip flattened.

Capsule 4-6 mm. long.

Capsules 10-14 mm. long, surpassed by the calyx.