Assertion: periwinkle's flower | /r/AtLocation | spring
Facets:
Source sentences:
text: Tubular, lavender blue, phlox-like flowers (to 1 inch across) appear in the leaf axils in spring and continue to flower intermittently throughout summer into fall.
text: Lavender-blue or white flowers appear in the spring and sporadically all season.
text: Periwinkle-blue flowers appear in spring.