Flora of North America species comparison

erect or spreading, dichotomously branched, often hollow.

alternate.

axillary, solitary flowers or 2–3[4–6]-flowered fascicles.

5–7-merous;

calyx not expanded or accrescent, cyathiform or campanulate, margins truncate, entire, ± undulated, or with 5–10 teeth of 2 lengths, base somewhat enlarged in fruit, not expanded or accrescent;

corolla pure white, greenish white, bluish white, yellow, or purple, sometimes with tan or greenish yellow markings, radial, rotate, subrotate, or campanulate, stellate or 5-angled or -lobed;

stamens inserted at base of corolla, equal [unequal], [with or without paired appendages at base of each filament];

anthers basifixed, oblong to lanceolate, dehiscing by longitudinal slits;

ovary 2-carpellate;

style cylindric, elongate, slender, usually longer than ovary [except in species with stylar heteromorphism];

stigma capitate.

berries, globose or ovoid and elongated, dry to fleshy.

(5–45), yellow to cream or brown, flattened, reniform or subreniform.

= 12, 13.