Persicaria genus -- buckwheat family

longroot smartweed (Persicaria amphibia) -- in July -- near Sand Creek Ranch, southern Wyoming             red & pink      

longroot smartweed (Persicaria amphibia) -- in September -- Fossil Creek Reservoir, Fort Collins Natural Area, CO

longroot smartweed (Persicaria amphibia) -- in September -- Boyd Lake State Park, Larimer County, CO

longroot smartweed (Persicaria amphibia)-- in July -- Fremont National Forest, southern Oregon         red & pink     

​longroot smartweed (Persicaria amphibia) -- in September -- Homestead, Fort Collins Natural Area, Larimer County, CO

curlytop knotweed (Persicaria lapathifolia) -- in August -- High Plains Environmental Center, Loveland, CO   white & cream

curlytop knotweed (Persicaria lapathifolia) -- in October -- Hall Ranch Open Space, Boulder County, CO     

dotted smartweed (Persicaria punctata) -- in September -- Homestead, a Fort Collins Natural Area, Larimer County, CO