小果大茨藻 xiao guo da ci zao

Najas intermedia Gorski in Eichwald, Naturhist. Skizze, 126. 1830; N. marina subsp. intermedia (Gorski) Casper.

Stems only slightly spiny. Leaves with 4-8 conspicuous teeth on margin, abaxial side of midvein with spines. Style and stigma 0.2-1.4 mm; anthers 1-3.3 mm. Seeds 2.5-4 × 1.2-2 mm.

Ponds. Yunnan [cold to warm-temperate areas from Europe to C Asia, extending to a few subtropical parts of Asia].