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.

Basal leaves oblanceolate, 3-6 cm. long and 2-15 mm. wide;

cauline leaves several pairs, oblanceolate to linear.

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 few to many in a compact or open inflorescence;

calyx 5-lobed, tubular, 4-10 mm. long, 10-nerved, glabrous;

petals 5, white to pink, with a narrow claw 2-3 times as long as the obcordate blade;

blade appendages two, 0.4 mm. long;

stamens 10;

styles 3.

Capsule 3-celled.

Capsule 3-celled.