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, deep green, entire, the basal ones well developed, petiolate, up to 17 cm. long and 4 cm. wide, the cauline mostly sessile, reduced 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 2-several dense verticillasters;

calyx 4-7 mm. long, the 5 segments lanceolate to ovate or obovate, the margins scarious;

corolla 2-lipped, glandular-hairy externally, blue or purple to pale yellow or nearly white, 12-20 mm. long, the tube expanded toward the mouth;

staminode and raised portion of lower petal bearded;

pollen sacs glabrous, becoming opposite.

Capsule 4-6 mm. long.

Capsules 6-8 mm. long.