UW Burke Herbarium species comparison

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.

Leaves irregularly arranged, many ternate or whorled, others opposite or single, glabrous or puberulent, all cauline, the lowermost reduced, the others numerous, sessile from a narrow base, linear or narrowly lance-elliptic, up to 5 cm. long and 1 cm. wide, irregularly and sharply toothed.

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.

Inflorescence a loose panicle, often leafy-bracteate below;

calyx 4-6 mm. long, the 5 segments green or purplish, entire, often unequal;

corolla blue-lavender to light purple-violet, 13-19 mm. long, weakly bilabiate, glandular-hairy outside and glabrous within, the upper lip cleft more than half its length;

anthers 0.9-1.3 mm. long, permanently horseshoe-shaped, the pollen sacs saccate and indehiscent below;

staminode exerted, long-bearded half its length.

Capsule 6-9 mm. long.

Capsule 4-6 mm. long