Large-flower Coreopsis - Large Flower Tickseed
Coreopsis grandiflora
Asteraceae (Composite Sunflower) Family

Back of flower showing red bracts
 

Deeply lobed leaf of Coreopsis

 

The Large-flower Coreopsis is used extensively by the Department of Transportation in wildflower plots along the Interstate system, particularly in coastal areas and Panhandle Florida.  Preferred habitat is thin woods, roadsides, ditches and the margin of stagnant ponds. Distribution is throughout the Escambia region.

Plant is an upright, smooth slightly hairy perennial from rhizomes.

The leaves are stalked, alternate on the stem, deeply lobed with some segments lobed again (pinnately divided).  Tips are long pointed and base graduates to a narrow base.

Flowers are large, yellow or orange in color, often with two tiers of petals.  Flower heads are at the end of the flowering stem, symmetrical in form and resting atop long, stout stalks.  Disc flowers are bisexual while all ray flowers are female bearing toothed margins.  The heads are supported by reddish inner bracts that are broadly triangular and dark green outer bracts.  Flowers may occur in any season but the plant is usually seen as an autumn bloomer.

Fruit is achene (a seed which outer layer is fused to it).

The C. floridana, of south and central Florida, is closely related to this plant and is the forerunner to the more domesticated species.

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