Appearance
Hieracium x floribundum is a perennial herbaceous plant in the sunflower family that ranges from 10-36 in. (25-91 cm) tall. The single stem contains a milky sap and has long sparsely scattered bristles. H. x floribundum is native to temperate Asia and Europe.

Foliage
Most of the leaves are basal and range from 1.5-5 in. (3.8-12.7 cm) long. The leaf blades are spatula-shaped and pilose.

Flowers
There can be up to 30 flowers per plant. The small flowers are held in a loose corymb. The yellow-ray flowers resemble small dandelions and bloom from June to August.

Fruit
The dandelion-like seeds have a plume of bristles to aid in dispersal by wind. H. x floribundum also spreads vegetatively by stolons.

Ecological Threat
H. x floribundum outcompetes native species by producing mats of rosettes. It and invades native meadows, prairies, pastures, fields, roadsides, and lawns. H. x floribundum prefers sunny locations.

Maps

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Invasive Listing Sources

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• Invasive Plant Species of West Virginia
• Montana Noxious Weeds
• Oregon Noxious Weeds
• Pacific Northwest Exotic Pest Plant Council, 1998
• Washington Noxious Weeds
• West Virginia Native Plant Society, Flora West Virginia Project, and West Virginia Curatorial Database System, September 3, 1999

References

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Common Name Reference: USDA, NRCS. 2010. The PLANTS Database. National Plant Data Center, Baton Rouge, LA, USA.

Scientific Name Reference: USDA, NRCS. 2010. The PLANTS Database. National Plant Data Center, Baton Rouge, LA, USA.