Strong annual herb, 1-1.5 meters, the whole plant is clayey glandular hairs, with special smell, stipular thorns, spines up to 4 mm, sharp, curved outside. Leaves palmate with 5-7 leaflets, leaflets herbaceous, oval-lanceolate or oblanceolate, grand central leaflets, 6-8 cm long, 1.5-2.5 cm wide, the outermost minimum length approximately 2 cm and a width of 5 mm, base wedge-shaped, narrow extension into small petiole, coupled with the petiole is slightly webbed at the top attenuate or acute, short tip, coat both sides, the back and sometimes also in the vein the lateral veins often prickly, lateral veins 10-15 pairs; petiole 2-8 cm long, often pale yellow prickles. Racemes up to 40 cm, densely glandular hairs clay; bracts single one, leaflike, ovate-oblong, 5-20 mm long, sessile or subsessile, the number of heart-shaped base; bud cylinder shaped, about 2.5 cm in diameter and 4 mm, glabrous; pedicels 2-3 cm long, covered with short glandular hairs, born within a single bract axils; sepals 4, 6 mm long, oblong-elliptic, apex acuminate and, outside glandular hairs; petals pink, rare white, imbricate in bud, the hairless, 5-12 mm long claws, flap obovatus volts spatulate, 10-15 mm long, wide 4-6 mm, top round, base attenuate; stamens 6, filaments 3.5-4 cm long, anthers linear, 7-8 mm long; androgynophore 1-3 mm long; gynophore 4 cm long, while a slight increase in fruit; ovary line cylindrical, 3-4 mm long, glabrous; almost no style, stigma head. Fruit cylindrical, 5.5-6.5 cm long, about 4 mm diameter in the middle, the ends blunt tip, the surface was nearly flat or emblem beaded, with fine and dense and not very clear veins. Seeds of about 2 mm in diameter, nearly smooth surface or a small verrucose, not arillate. Flowering in early summer, late summer fruit.