Flora of North America species comparison

stoloniferous, prostrate or ascending, glabrous.

basal, opposite, sometimes rosulate;

stipules absent;

petiole present or absent;

blade fleshy or not, leathery or not, margins entire.

axillary, flowers solitary;

bracts absent.

present;

bracteoles present or absent.

bisexual; chasmogamous flowers emergent;

sepals [4]5, calyx radially or slightly bilaterally symmetric, campanulate, lobes lanceolate to triangular;

petals [4]5, corolla white, pink, pale purple, or lavender, slightly bilaterally symmetric, campanulate, not saccate, abaxial lobes 3, adaxial 2;

stamens 4, adnate near mouth of corolla, didynamous or equal, filaments glabrous, staminode 0;

ovary 2-locular proximally, 1-locular distally, placentation free-central;

stigma capitate or slightly 2-lobed.

capsules, ellipsoid to globular, dehiscence septicidal.

3–200, yellow to dark brown, fusiform or cylindric, wings absent.