Persicaria hydropiperoides FWS-1

描述：

Description: Persicaria hydropiperoides (syn. Polygonum hydropiperoides) at Humboldt Bay National Wildlife Refuge Complex, California, USA. Date: Unknown dateUnknown date. Source: http://www.fws.gov/humboldtbay/plantguide/genus-p.html. Author: Gordon Leppig & Andrea J. Pickart. Permission(Reusing this file): public domain - with attribution [1].