3. Isopyrum L., Sp. Pl. 587. 1753. Gen. Pl. ed. 5:621.1754; Boiss., Fl. Or. 1:23.1872; Hook.f. & Thoms. in Hook. f. Fl. Brit. Ind. 1:23.1872; Drummond & Hutchinson in Kew Bull. 1920:145.1920; Ulbrich in Notizbl. Bot. Garten. Berlin, 9:209.1925; Wang & Hsiao in Acta Phytotax. Simal. 9:315.1964; Tamura & Lauener in Notes, Roy. Bot. Gard. Edinb. 28:265-272.1968.
HARALD RIEDL and YASIN J. NASIR
Naturhistorisches Museum, Botanische Abteilung, Wien, Austria.
National Herbarium, Pakistan Agricultural Research Council, Islamabad, Pakistan.
Perennial, not caespitose. Stem branched, slender, with leaves. Leaves ternate with pinnate segments. Sepals white, petaloid. Petals flat or slightly concave, with a very short stipe. Fruit consisting of 1-5 free follicles.
A small genus of about 12 species. The delimitation against Paraquilegia is still not quite clear. The present treatment follows the results of Wang & Hsiao and of Tamura & Lauener. According to this concept, only 1 species is found in Pakistan.