99. Rumex umbellatus Houtt.,

Nat. Hist. II(8): Aanwyz. Plaat. [2], 414, tab. 47, fig. 3. 1777.

Lectotypus (designated here by Veldkamp): JAPAN: Thunberg s.n. (G-PREL [G00818078]!).

= Persicaria chinensis (L.) H. Gross in Bot. Jahrb. Syst. 49: 269. 1913.

Notes. – Original material is in the Japan herbarium in G-PREL. The only collection there is a good match for the plate and is therefore designated here as the lectotype. No duplicate has been found in UPS-THUNB.