Evolvulus argyreus

Native to western South America and northeastern Brazil, this small shrub or subshrub belongs to the morning-glory family. Its flowers have a spreading, wheel-shaped corolla that may be blue, lilac, or white. The sepals are lance-shaped and covered with silky hairs. Unlike many morning glories, Evolvulus plants have non-twining stems. The genus also differs in having two styles, each divided into slender stigmas. Photographed in Colombia.