sulphurflower buckwheat eriogonum umbellatum var. subalpinum, greenish white flower

plant flower produce blossom wildflower food shrub herb branch green fruit nature petal leaf tree evergreen lilac low form sulphur eriogonum umbellatum species wild buckwheat knotweed family polygonaceae high resolution botanical inflorescence flora rarity cultivar variety hybrid endemic natural habitat sulphurflower var subalpinum greenish white