Polygonum lapathifolium, spec. nov.

6. Polygonum floribus pentandris semidigynis, staminibus corollae regulari aequalibus.

Persicaria floribus pentandris digynis, corolla regulari staminibus aequali. Wach. ultr. 257.

Persicaria florum staminibus quinis semidigynis, stylo bifido corollae regulari aequantibus. Hort. cliff. 42.

Persicaria major, lapathi foliis, calyce floris purpureo. Tournef. inst. 510. Raj. suppl. 119.

Persicaria Hydropiper. Lob. ic. 315.

Habitat in Gallia.