New England hawkweed, European hawkweed USDA PLANTS Symbol: HISA4
U.S. Nativity: Exotic
Habit: Forbs/Herbs
Hieracium sabaudum L.
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Taxonomic Rank: Magnoliopsida: Asterales: Asteraceae
Appearance
Hieracium sabaudum is a perennial herbaceous plant in the sunflower family that ranges from 10-48 in. (25-122 cm) tall. The multiple hirsute stems contain a milky sap. H. sabaudum is native to temperate Asia and Europe.
Foliage
The many leaves are larger and denser near the bottom of the stem, becoming smaller as they ascend up the stem. The leaf blades are lanceolate with toothed margins. The underside of the leaf is pilose.
Flowers
There can be from 25-30 or more small flowers held in a loose corymb. The yellow ray flowers resemble small dandelions and bloom from July to October.
Fruit
The dandelion like seeds have a plume of bristles to aid in dispersal by wind.
Ecological Threat
H. sabaudum outcompetes native species and invades along roadsides, forest clearings, open fields, pastures and other disturbed sites. It prefers well drained sites and is considered highly invasive.
EDDMapS Distribution:
This map is incomplete and is based only on current site and county level reports made by experts and records obtained from USDA Plants Database. For more information, visit www.eddmaps.org 		 


State List
This map identifies those states that list this species on their invasive species list or law.

Invasive Listing Sources: