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, entire, the basal ones clustered, up to 27 cm. long and 4 cm. wide, petiolate, the blade lanceolate or narrowly elliptic;

cauline leaves mostly sessile, broad and clasping.

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 5-cleft nearly to the base, 6-9 mm. long, the segments narrow and acuminate;

corolla bilabiate, bright blue, 25-33 mm. long, about 1 cm. wide at the mouth, glabrous;

pollen sacs 1.9-2.5 mm. long, divaricate, twisted, dentate along the sutures, the inner end indehiscent;

fertile stamens 4;

sterile stamen short-bearded toward the tip.

Capsule 4-6 mm. long.

Capsule 9-12 mm. long.