CLASS 1A WEEDS
CLASS 1B WEEDS
Blueweed (Vipers bugloss)
Common St. Johnswort
CLASS 2 WEEDS
CLASS 3 WEEDS
Perennial sorghum ssp. (Johnsongrass)
Phragmites (Common reed)
CLASS 4 WEEDS
Cogongrass (Japanese blood grass)
Houndstongue is a native of Europe. It thrives in disturbed soils along roadsides, trails, in pastures, and rangelands. Because of the bur-like seed, it spreads widely along travel corridors as a passenger on clothing or animal fur. It is toxic to livestock.
Houndstongue is a one to four foot tall biennial.
Basal leaves are about three inches wide with a hairy surface. Upper leaves are narrower, about one inch wide and have a curled appearance, and partially clasp the stem.
Small reddish purple flowers form in the upper portions of the plant along stems borne in leaf axils. Bloom is in early summer.
Each flower produces four green bur-like fruits that turn brown as they mature.