close up of buckwheat seeds

500 3900 achenes altitude annual august black bract bracts branched broadly brown buckwheat china cultivated dampness dark dull fagopyrum fields flowering flowers fodder fruiting genus green grooves grows herb high hillsides inflorescence joints june leaves longer longitudinal medicinal middle mountains north northeast northwest obtuse october ovate papillary pedicel perianth persistent plant polygonaceae protrusions purple purposes racemose regulating removing roadsides root seeds september sharp slightly southwest sparsely stems tartary tataricum teeth thin triangular wavy wild