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Common groundsel (Senecio vulgaris) flowers heads are 1/4 to 1/2 inch long, tubular, and yellow.

Common groundsel (Senecio vulgaris) flowers

Each flower head is composed of many individual disk flowers.  In the extreme closeup below, you can see the individual flowers that make up the composite head.

common groundsel flower Senecio vulgaris

The black tipped involucre bracts are another unique identification characteristic of this weed.

common groundsel flower Senecio vulgaris

Each disk flower develops into a single seed covered by a cotton-like pappus.

Common groundsel (Senecio vulgaris) flowers

Common groundsel can develop flowers at a very small size.  This neccesitates postemergence control of escape weeds soon after germination.

Common groundsel (Senecio vulgaris) flowers



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