UW Burke Herbarium species comparison

Leaves opposite, crowded near the ground, short-hairy abaxially (underside), viscid to glabrous adaxially (upperside);

leaves oblanceolate, sessile, nearly entire, 3-nerved from the base, 7-25 mm. long and 3-11 mm. wide.

Leaves cauline, basal ones not persistent;

petioles 2-14 mm;

blade triangular to ovate to narrowly ovate, 4-16 mm long and 2-11 mm broad, palmate venation, base rounded to cuneate to truncate, margins finely toothed or entire, apex acute, surfaces hairy-glandular as stems.

Flowers solitary on slender pedicels up to 10 cm. long arising from the leaf clusters;

calyx narrow, 4-8 mm. long, mostly glabrous, the 5 teeth short, equal;

corolla yellow, often dotted with maroon, 1-2 cm. long, scarcely bilabiate, the 5 lobes spreading, shallowly notched, the throat somewhat flaring;

stamens 4.

Axillary flowers 1-6, emerging from nodes throughout; fruiting pedicels 20-50 mm, densely covered with minute stalked glands;

calyx greenish, ridged, tubular, slightly inflated, 6-8 mm, margins toothed or lobed, covered with minute stalked glands, lobes pronounced, erect;

corollas yellow with small reddish brown dots, lower limb with two whitish patches, symmetric bilaterally, bilabiate;

tube-throat funnel-shaped and 8-10 mm, protruding beyond calyx margin;

limb expanded 7-10 mm, lobes obovate-oblong, apex rounded to somewhat cuneate;

styles hispid-hirtellous;

anthers not protruding, glabrous.

Capsule.

Capsules 5-8.5 mm, included.