Narrow-leaf Bittercress as described by the USDA Natural Resource Conservation Service:
“biennial herbaceous plant; with erect form; 6″-31″ tall; shiny green in color - stem leaves alternate; numerous (6-20); thin and pliable; up to 4″ long, or longer - lower and middle stem leaves have 6-9 pairs of long-pointed, somewhat lobed leaflets - small ears of the leaf bases remain on the mainstem when the principal leaves are removed – flower petals may be absent; if present, 4, white, tiny (1/10″ long or less); in June - fruit is a slender, upward-growing, string bean-like silique 6/10″ to 3/4″ long”
– Pyle, 2002. Invasive Species Identification Sheet http://www.ct.nrcs.usda.gov
Photo from Minnesota Wildflowers http://www.minnesotawildflowers.info/flower/narrow-leaf-bittercress
The reporting forms are starting to roll in- Keep up the great work everyone!