UW Burke Herbarium species comparison

Leaves opposite, ovate-lanceolate to elliptic-oblanceolate, 5-12 cm. long and up to 4 cm. broad, the lower ones long-petiolate, the upper sub-sessile.

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 few to several in an open inflorescence, the pedicels 3-30 mm. long;

calyx 5u00e2u20acu201clobed, tubular, 15 mm. long at flowering, much enlarged in fruit, 10-nerved, the lobes lance-linear, 5-9 mm. long;

petals 5, white to pinkish, glabrous, the claw 12-25 mm. long, auriculate above, the blade 7-10 mm. long, bi-lobed less than half the length;

blade appendages 2, 0.5-1.5 mm. long and broad;

stamens 10;

styles 3. Flowers open at dusk.

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.

Capsule 3-celled.