Cutleaf Vipergrass
An herbaceous, taprooted biennial or short-lived perennial, with hollow, branching stems, that grows about 1 1/2 feet tall.
Common St. Johnswort
St Johnswort invades areas with sandy or gravelly soils.
Camelthorn
A rhizomatous, thorny, highly branched herbaceous perennial that grows up to 4 feet tall.