粗糙金鱼藻 cu cao jin yu zao

Ceratophyllum kossinskyi Kuzeneva-Prochorova, Fl. URSS 7: 721. 1937; C.inflatum C. C. Jao ex K. C. Kuan; C. manschuricum (Miki) Kitagawa; C. submersum Linnaeus var. manschuricum Miki; C. submersum var. squamosum Wilmot-Dear.

Stems to 1 m. Leaves yellowish green, 2--4 × dichotomously divided, whorls 2.5--6 cm in diam.; segments linear to filiform, 1--1.2 cm × 0.2--2 mm, bases occasionally inflated. Flowers unknown. Achene brown or dark green, 3.5--4 × 2--2.5 mm, surfaces tuberculate to papillate, with plate-like ridges that occasionally become spiny, margins winged or wingless, entire or with 1--8 slender spines, 0.1--2.5 mm; basal spines 2, 1.5--6 mm; terminal spine (persistent style) 1--1.5 cm. Fl. and fr. Jul--Oct.

Lakes, ponds, streams. Fujian, Hebei, Heilongjiang, S Hubei (Shashi Shi), Jiangsu, Jilin, Liaoning, Nei Mongol, Ningxia, Taiwan, Yunnan [Kazakhstan, Russia (Siberia); E Europe].