UW Burke Herbarium species comparison

Leaves opposite, the few basal leaves oblanceolate to spatulate, broadly petiolate;

cauline leaves narrower, 1.5-4 cm. long and 2-8 mm. broad.

Flowers several to numerous in a simple to compound, leafy-bracteate raceme;

calyx tubular, 5-lobed, 10-nerved, 6-9 mm. long, inflating in fruit, constricted at the orifice, glandular-pubescent, with stiff hairs up to 2 mm. long;

petals 5, whitish to pink, lavender, or deep purple;

claw of the petal narrow, 4-6 mm. long, the blade elliptic-obovate, usually entire, slightly twisted, making the corolla look like a pinwheel;

blade appendages 2, linear, entire, 1 mm. long;

ovary stalk 1 mm. long;

stamens 10;

styles 3.

Capsule 3-celled.