Polygonum Sect. Knorringia Czukav in Nov. Syst. Pl. Vas. 93, 1966; Polygonum Sect. Aconogonon Meisn., Monog. Plygon. 55. 1826 p.p.; Aconogonon (Meisn.) Reichenb. Sect. Knorringia (Czukav) Sojak in Preslia (Praha) 46(2): 151.1974.

Rhizomatous, densely branched, perennial plants. Leaves elongate-elliptic or oblong to linear, usually glandular punctate with hastate or auriculate base. Flowers arranged in dense axillary or terminal racemes or branched panicle, small, pedicellate. Tepals ± unequal. Stamens 8 (9-10), equal, dilated at the base. Nuts triquetrous, obtuse, black. Cotyledons incumbent, narrow.

A monotypic genus, distributed in Central Asia, USSR, China, Afghanistan and Pakistan reaching further east to Nepal.

Lower Taxa

• Knorringia sibirica (Laxm.) S.-P. Hong
• Knorringia sibirica subsp. sibirica
• Knorringia sibirica subsp. thomsonii (Meisn. ex Steward) S. P. Hong