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, all cauline, the lowermost reduced, the others numerous, sessile, lanceolate to broadly oblong, 4-10 cm. long and 1-3 cm. wide, sharply serrate or occasionally sub-entire.

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 a narrow, terminal panicle, or nearly a raceme;

calyx 2.5-6.5 mm. long, the 5 segments scarious margined and toothed, usually glabrous;

corolla bright lavender to purple-violet, 25-38 mm. long, over 1 cm. wide at the mouth, glabrous inside and out except for the marginal hairs on the lobes; the 4 fertile filaments pubescent toward the tip, the lower pair exerted;

anthers permanently horseshoe-shaped, 1.6-2.0 mm. long;

pollen sacs remaining saccate and indehiscent on the lower half, glabrous except for the hairs along the sutures;

staminode shortly exerted, with a long, white beard along the flattened tip.

Capsule 4-6 mm. long.

Capsule 6-9 mm. long.