疣果毛茛 you guo mao gen

Herbs annual. Stems ca. 25 cm, sparsely hispid below, strigose above. Basal leaves ca. 6; petiole 6--12 cm, sparsely hispid; blade ternate, ovate in outline, 2.2--5 × 1.8--5 cm, papery, sparsely strigose or glabrescent; central leaflet long petiolulate, pentagonal-ovate, 3-partite, lobe margin incised-dentate, central lobe broadly rhombic-obovate, lateral lobes oblique obovate; lateral leaflets smaller, shortly petiolulate. Stem leaves petiolate or subsessile, ternate. Monochasium 1--4-flowered; bracts 3-sect. Flowers ca. 1.6 cm in diam. Pedicel 1.5--4.5 cm, strigose. Receptacle puberulent. Sepals 5, ovate, ca. 6 mm, abaxially sparsely strigose. Petals 5, obovate, ca. 8 × 7 mm, nectary pit covered by a scale, apex rounded. Stamens numerous. Aggregate fruit cylindric, ca. 8 × 5 mm. Achene complanate, broadly obovate or orbicular-obovate, 2.2--2.5 × ca. 2 mm, glabrous, verrucose, narrowly marginate; style persistent, ca. 0.1 mm. Fl. Apr.

Naturalized on grassy slopes. C Hunan (Shaoyang Xian) [native to SE Europe and W Asia].