It flowers from May to August, grows freely, and is usually propagated by cuttings.
[213]
Polygonum Orientale. Tall Persicaria.
Class and Order.
Octandria Trigynia.
Generic Character.
Cal. 0. Cor. 5-partita, calycina. Sem. 1. angulatum.
Specific Character and Synonyms.
POLYGONUM orientale floribus heptandris digynis, foliis ovatis, caule erecto, stipulis hirtis hypocrateriformibus. Linn. Syst. Vegetab. ed. 14. Murr. p. 377. Ait. Hort. Kew. V. 2. p. 32.