Azure bluet

Prepared by Jennifer L. D’Appollonio, Assistant Scientist, University of Maine, Orono, ME 04469. Updated February 2018.

Scientific name: Houstonia caerulea L.

Common name(s): azure bluet, little bluet, Quaker ladies

Links: USDA PLANTS Profile , NPIN Profile, Go Botany

Images: (to see enlargements [PC]: click on image, then right click and choose “view image”)



-generally flowers May-June in ME

-small white or blueish flowers

-simple opposite leaves


-anthropogenic disturbed areas

-alpine cliffs

-forests and fields

-shores of rivers


Heinrich, B. 1976. Flowering phenologies: Bog, woodland, and disturbed habitats. Ecology. 57(5):890-899.

Go Botany. “Houstonia Caerulea L.” Houstonia Caerulea (Little Bluet): Go Botany, 2020,