weeds of persicaria lapathifolia grow in the field

persicaria lapathifolia polygonum lapathifolium scabrum plant weed field dockweed smartweed botanical herb flower nature botany flora bloom blooming blossom floral medicine pharmacy species pale wild plants wildflower flowering blossoming inflorescence meadow grass postcard rural garden plantae biodiversity green herbal agriculture botanic foliage leaf growth polygonaceae