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 mostly basal, linear-oblanceolate, 3-8 cm. long and 4-10 mm. broad, long-petiolate;

cauline leaves 2-3 pairs, narrower but not shorter than the basal leaves.

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, in a tight terminal cluster with 1-2 lower on the stem;

calyx 5-lobed, tubular, inflating in fruit, 12-16 mm. long, glandular-hairy, with 10 prominent nerves;

petals 5, white, or greenish or purplish tinged; the claw about 11 mm. long, broadened above;

blade about 5 mm. long, bi-lobed to mid-length, each margin with a shorter lateral tooth;

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

ovary stalk 3 mm. long;

stamens 10;

styles usually 3, exerted.

Capsule 3-celled.

Capsule 1-celled.