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, ovate-lanceolate to oblanceolate, 3-8 cm. long and 1-3 cm. 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 many in an open, rather flat-topped inflorescence, with narrow, inconspicuous bracts;

calyx 5-lobed, bell-shaped, 1 cm. long at blooming, but inflated and up to 2 cm. long in fruit, pale green to purplish, glabrous;

petals 5, white, the claw about 1 cm. long, expanded above, the blade 4-6 mm. long, deeply bi-lobed; appendages at the base of the blade 2 and minute, or lacking;

ovary stalk 2-3 mm. long;

stamens 10;

styles usually 3.

Capsule 3-celled.

Capsule 3-celled.