Synonym:  Galinsoga ciliata  (Raf.) Blake

              

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Plants of fields, roadsides, disturbed areas, waste places.  Flowers between June and October.  Not native.

Annual.  Stems are pubescent with long, spreading hairs.  Branching is opposite.  Typical height is 1-2 feet.

Inflorescences are usually several branched, leafy, each bearing several flower heads. Branching often begins from near plant base.

Flower heads are radiateRay florets are most often 4 or 5, pistillate and fertile; corollas white, up to 2.5 mm long.  Disc florets are bright yellow, bisexual and fertile.  Receptacles bear chaffInvolucral bracts are pubescent, sometimes with gland-tipped hairs; deciduous in fruitPeduncles are often with gland-tipped hairs.

Basal leaves are not present at flowering.  Stem and branch leaves are opposite, ovate to broadly lanceolate, usually toothed, usually pubescent.

Cypselae are conical in shape, black, pubescent.  Pappus consists  of several white, lacerate/fringed scales.

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Similar species:  Galinsoga parvifloraG. parviflora seems to be much less common.  Its ray florets are described as "dull white" to pinkish, and are even smaller (up to 1.8 mm long) than the ray florets of G. quadriradiata.  The involucral bracts of G. parviflora are persistent after maturation of the fruits.

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