Flora of North America species comparison

erect, glabrous or papillose distally.

cauline, sometimes appearing basal, alternate or pseudoverticillate in 1–4 whorls;

petiole present;

blade not maculate, broadly elliptic to orbiculate, subcoriaceous, margins crenate-serrate to serrate, plane, surfaces glabrous.

solitary flowers, not lax in bud or flower, erect in fruit;

peduncular bracts present or absent.

absent.

radially symmetric, spreading or nodding;

sepals 5, connate proximally, often obscurely so, calyx lobes ovate to narrowly ovate;

petals 5, distinct, creamy white, without basal tubercles, corolla rotate to broadly campanulate;

intrastaminal nectary disc absent;

stamens 10, included;

filaments broad proximally, gradually narrowed medially, slender distally, glabrous;

anthers oblong, without awns, with tubules, dehiscent by 2 round pores;

pistil 5-carpellate;

ovary imperfectly 5-locular;

placentation intruded-parietal;

style (exserted), straight, expanded distally;

stigma 5-lobed, without subtending ring of hairs.

capsular, erect, dehiscence loculicidal, no cobwebby tissue exposed by splitting valves at dehiscence.

ca. 1000, fusiform, winged.

= 11, 12, 13, 16.