Polygonum alpinum var. lapathifolium Cham. & Schltdl.
Polygonum polymorphum var. lapathifolium (Cham. & Schltdl.) Ledeb.
Koenigia alaskana (synonymAconogonon alaskanum, Persicaria alpina) is an Asian and North American species of flowering plant in the buckwheat family known by the common names Alaska wild-rhubarb and alpine knotweed.[2]
Description
This herbaceous or semi-evergreen[2]perennial grows up to 2 meters (almost 7 feet) tall, with a woody root and lanceolate leaves. The abundant flowers are white, cream or pale green, borne in plumes in midsummer.[3] They are followed by pinkish seed-heads later in summer or in early autumn. However, in a garden setting they are usually cut back after flowering to preserve vigour.[2]
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