||Thlaspi arvense L.
||Penny-cress and stink-weed.
||Plant with a rosette of leaves and erect flowering stems.
Fruits are winged pods.
||Cotyledons are bluish green, and oval to elliptical on long
petioles. Young leaves are smooth, round to oval on petioles and arranged
in a basal rosette.
|True Leaves and Stem
|| Leaves are lanceolate to ovate, with a wavy or toothed margin.
Basal leaves do not persist until maturity. Stems are smooth, erect and
have very few leaves. Stems leaves are sessile and have auricles where the
leaf attaches to the stem.
||Taproot with secondary fiberous roots.
|Flower and Fruit
|| White, four-petaled flowers are produced in dense racemes.
The racemes elongate with age. Fruits are flat, winged, circular (penny-shaped),
with a notch at the apex. There are approximately 4-16 seeds in each fruit.