3. Fallopia dentato-alata (F. Schmidt) Holub in Folia Geobot. Phytotax. 6(2): 176. 1971.
Polygonum dentato-alatum F. Schmidt in Maxim. Fl. Am. 232. 1859; Kom., Fl. URSS. 5: 696. Plate XLIX. f. 2. 1936; Tiniaria scandens Nakai var. dentato-alata Nakai in Mori Enum. Pl. Korea 137. 1922; Fagopyrum scandens (L.) H. Gross var. dentato-alatum (Maxim.) H. Gross in Bull. Geogr. Bot. 23: 23. 1913.
Annual herb with trailing stem, branches smooth, 4-angled, younger branches 8-angled, slightly prickly at the angles. Leaves cordate to ovate, acute to acuminate, (3.5-) 4-6 x 3-5 cm, entire, minutely papillose on the margins and the mid veins especially on the lower side, petiole 5-30 mm long, minutely prickly; ochrea membranous, small, glabrous. Racemes terminal and axillary fascicles of 3-5 flowers. Pedicel articulated below the middle up to 10 mm long. Perianth 5-cleft, decurrent, the outer 3 enlarging into a coriaceous wing along the midrib; wings mostly toothed, cuneately decurrent at the base, 1.5-2 mm broad, fruiting perianth yellowish-green. Nut up to 5 mm long, shining black.
Type: Described from the banks of Amur below Khabarovsk. (LE).
Distribution: Japan, Russia, China and Pakistan.
This is a new record for Pakistan. Resembles with F. dumetorum but can easily be differentiated by its cunneatly decurrent wings at the base and larger nuts.