Spotted Knapweed

Description:

Knapweed is a pioneer species found in recently disturbed sites or openings. Once it has been established at a disturbed site, it continues to spread into the surrounding habitat. This species outcompetes natives through at least three methods: 1.A tap root that sucks up water faster than the root systems of its neighbors, 2.Quick spread through high seed production, and 3.Low palatability, meaning it is less likely to be chosen as food by herbivores. It is also suspected to be allelopathic, releasing a toxin from its roots that stunts the growth of nearby plants of other species.

Habitat:

Native to eastern Europe. From NPS site "Distribution and Habitat Spotted knapweed is widely distributed in the U.S. and is reported to occur in every state in the Lower 48 except Texas, Oklahoma and Georgia. Over two dozen states and seventeen large national parks across the country recognize it as a significant invasive plant of natural areas. It invades open habitats, preferring full sun and can tolerate nutrient poor soils and harsh dry conditions." (http://www.nps.gov/plants/alien/pubs/mid...) Unfortunately, this spotting is in Georgia and there were many, many of these plants in the area.

Notes:

Spotted growing on a wooded drive near an old church and cemetery and a utility plant.