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 basal and cauline, or basal leaves may not persist, mid-stem or higher leaves often largest and becoming smaller distally; petiolate, petioles 3-20, distally sessile;

blade ovate to orbicular to oblong, middle and distal cauline leaves may be orbicular to nearly reniform, generally 10-35 mm long and 6 to 26 broad, 3-5 palmately-arranged veins, earlobe-like appendages near base, base rounded to truncate to slightly cordate, margins distinctly toothed to nearly entire, larger plants show lower leaves lacerate lobed to pinnatifid margin bases, apex rounded, surfaces glabrous except bracts densely villous beneath and occasionally above, long eglandular hairs flattened and sometimes transparent.

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 generally 3-8, emerging from distal-most nodes; fruiting pedicels eglandular and smooth, longer than subtending leaves, typically 5-40 mm;

calyx sometimes with red dots, ovate to campanulate, inflated, compressed along sagittal plane, 9-14 mm, slightly hirtellous, throat sometimes closed or open, lobes curving upward weakly, top lobe not significantly longer than lower lobe, not distinctly curved;

corollas yellow, commonly with red spots, weak bilateral symmetry or near radial symmetry, slightly bilabiate or almost regular;

tube-throat cylindric to funnel-shaped, 8-12 mm, protruding 1-2 mm past calyx margin;

limb expanded 5-10 mm;

styles glabrous;

anthers not protruding, glabrous.

Capsule.

Capsules 6-7 mm, included, stalked.