dwarf morning glory

noun2

1. •
   A morning glory of the species Convolvulus tricolor, native to Southern Europe.

   • Since the flowers remain open only as long as the sun shines, dwarf morning glories should be used only in places with full exposure to the sun. — 1956
2. •
   A morning glory of the genus Evolvulus, most of which is native to the Americas.

   • [I]n the lower strata, the principal species are the dwarf morning glory (Evolvulus alsinoides) with its blue monopetal flowers, […] — 2010