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, ternate, whorled or scattered, sharply toothed to entire;

leaves on the short, sterile shoots oblanceolate to elliptic and short-petiolate, those on the flowering stems usually sessile and broad-based, up to 6 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, often rather loose;

calyx 2.5-6 mm. long, the 5 segments lanceolate;

corolla dull whitish with some purplish lines within, sometimes washed with lavender, 8-20 mm. long, the tube narrow;

staminode glabrous or hairy, not expanded toward the tip;

pollen sacs 0.5-0.9 mm. long, glabrous, dehiscent throughout, widely spreading.

Capsule 4-6 mm. long.

Capsule 3-5 mm. long.