Key to Tasmanian Dicots
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Persicaria prostrata (formerly known as Polygonum prostratum; Polygonaceae) 3:590

 
Persicaria prostrata (Creeping Knotweed) is a low growing herb found on the banks of streams and in ditches. It is not clear whether it is native or a weed. The leaves are narrow ovate, about 1-4cm long by 4-7mm wide, and quite hairy. The ochreas (the sheathing scales) are distinctive in being extended into a green, spreading toothed limb. The spike is shortly cylindrical, up to 4cm long and 4-7mm wide.
 

  

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