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, firm, irregularly serrulate or entire, the larger ones, up to 8 cm. long and 2.5 cm. wide, on sterile shoots borne toward the base of the main stem;

cauline leaves broad, sessile, and clasping, 1.5-3.5 cm. long and 0.8-2 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 essentially a raceme, the axillary peduncles simple and single-flowered or sometimes branched and 2-flowered;

calyx 5-7 mm. long, the 5 segments thin, ovate;

corolla bilabiate, lilac or rose-purple, 33-38 mm. long, 1 cm. wide at the mouth, glabrous outside, long-hairy near the base of the lower lip within;

anthers densely long-woolly, pollen sacs wholly dehiscent, becoming opposite

Capsule 4-6 mm. long.

Capsule narrow, up to 1 cm. long.