New York Natural Heritage Program
Clustered Bluets
Oldenlandia uniflora L.
Dicots

General Description [-]
Clustered bluets is a small, erect or spreading annual 1-5 dm tall. The hairy stem can be simple or sometimes many-branched. The opposite, lanceolate to oval leaves are sessile on the stem and 1-2.5 cm long. They have an obvious midvein and are white-hairy on the margins and the midvein. The flowers are in clusters along the stem or at the top and have four small white petals that are shorter than the sepals and lack a funnel-shaped base. The fruit is a rounded, white-hairy capsule that is also shorter than the sepals (Gleason and Cronquist 1991).

Best Life Stage for Proper Identification [-]
This species is best identified with the leafy plant in flower or fruit.

Similar Species [-]
Other bluet species have flowers that are more funnel-shaped below and are more bluish or purple. They also occur in drier soils (Gleason and Cronquist 1991).
Clustered Bluets Images
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The Best Time to See
Flowers August through September with fruits persisting through October.
J F M A M J J A S O N D
Flowering Fruiting
The time of year you would expect to find Clustered Bluets flowering (blue shading) and fruiting (orange shading) in New York.