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Plant Identification: SOLVED: Polygonaceae: Polygonum bistorta or hydropiper?

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Forum: Plant IdentificationReplies: 2, Views: 29
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towler
faicchio
Italy

November 16, 2013
4:52 AM

Post #9710107

Polygonum bistorta or hydropiper?
Without the inflorescence I find the plant difficult to determine the correct ID.

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kennedyh
Churchill, Victoria
Australia
(Zone 10a)



November 16, 2013
11:51 AM

Post #9710358

The genus of both those species is now persicaria. As you say it is hard to tell without an inflorescence, a close up of the ochrea, the stem-clasping sheath at the base of each leaf would probably help. They are a distinctive feature of all Persicarias. To me your pictures look much more like Persicaria hydropiper than P. bistorta.

Ken
towler
faicchio
Italy

November 17, 2013
8:38 AM

Post #9711005

Thank you Ken, Sometimes, as you probably know, one comes across a plant in the wrong season, making an ID exceedingly difficult at times. Thanks again

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