Phonetic Spelling:hoos-TOH-nee-uh see-ROO-lee-uh
Genus:Houstonia
Species:caerulea
Family:Rubiaceae
Bluet is a perennial wildflower that typically reaches a height of up to 6 inches. Its leaves are arranged oppositely and feature smooth edges. The larger leaves grow at the base of the stem, while the smaller leaves are found along the stem. The plant produces striking blue flowers with yellow centers, which bloom from mid-spring through mid-summer. Although visually appealing, Bluet thrives best when planted in areas with minimal competition, such as along pathways, in lawns, or in bare spots. The rosettes that emerge in spring can also be transplanted.
This charming and delicate flower often appears in vibrant clusters of light blue. The Star Violet (H. pusilla), which grows up to 4 inches tall, features small purple flowers and can be found in fields and open woodlands stretching from South Dakota to Maryland, and further south to Florida and Texas. Another notable species, the Large Houstonia (H. purpurea), stands between 6 to 16 inches tall and has 3 to 5 ribbed, opposite, ovate leaves, along with white or pink flowers. This species is distributed from Nebraska to Maine and down to Florida and Texas, thriving in forests, lawns, and disturbed areas. Some of these Houstonia species have occasionally been classified under the genus Hedyotis.
Fire Risk: This plant is rated as having low flammability.
Regions: Mountain, Piedmont, Coastal Plains
Seasons of Interest:
- Blooms: Spring
- Nut/Fruit/Seed: Summer
Wildlife Value: Bluet is moderately resistant to deer damage, and its flowers attract bees, butterflies, and other pollinators.
Houstonia caerulea Feature Summary
Houstonia caerulea Image Gallery











































