− | Thlaspi arvense, Linn. Penny Cress. Annual or biennial, 6-18 in. high, glabrous, yellow-green: basal lvs. obovate or spatulate, petioled; upper lvs. oblong, remotely and irregularly dentate: n.-st. mostly branched above: fls. small, white; sepals greenish. Eu.—A weed in most countries, including Amer. | + | Thlaspi arvense, Linn. Penny Cress. Annual or biennial, 6-18 in. high, glabrous, yellow-green: basal lvs. obovate or spatulate, petioled; upper lvs. oblong, remotely and irregularly dentate: fl.-st. mostly branched above: fls. small, white; sepals greenish. Eu.—A weed in most countries, including Amer. |