Clypeola jonthlaspi DC.
Not protected species in Bulgaria.
Annual, up to 25 cm tall, erect or suberect, branched mostly from the base, clothed with short branched or stellate appressed hairs. Leaves narrowly oblanceolate or oblong, rarely spathulate, sessile, 5-20 mm long, 1.5-4 mm borad, entire. Racemes 25-50-flowered, up to 10 cm long in fruit. Flowers c. 1.5 mm across, yellowish; pedicel up to 4 mm long in fruit, filiform, recurved. Sepals c. 1.5 mm long. Petals about as long as the sepals, linear-oblong, cuneate, apex subemarginate. Stamens c. 1.2: 1.5 mm long; filaments appendaged-dentate. Siliculae orbicular, suborbicular or broadly elliptic, very variable in size and hairiness, usually 4-5 mm in diam., biconvex; apex distinctly notched with a short, subsessile stigma; valves somewhat membranous, narrowly winged (margined), equally tumid, usually covered with simple, ± verruculose hairs, sometimes glabrous; seed 1, 1.5-2 mm in diameter. Flowering March-May.
In the next floristc regions: Znepole Region, West Frontier Mountains, The Struma Valley, The Mesta Valley, The Rhodopes (Western and Middle), Thracian Plane, The Tundzha Hilly Plane and The Strandzha; up to 700 m.
 Clypeola jonthlaspi in: Flora of Pakistan.
 Asenov, Iv. 1970. Flora Reipublicae Popularis Bulgaricae, tomum IV, Serdicae.
 Asenov, Iv. 1970.