common whitlowgrass (draba verna). inflorescence closeup

acute apex androecium anther anthesis belarus flora bifid black background botanical science botany brassicaceae calyx closeup common whitlowgrass corolla cruciferae draba verna early whitlow grass erophila filament floral bud flower focus stacking gynoecium habit lanceolate macro nailwort nature obovate pedicel petal plants pollen sepal shadflower simple hair spring stamen stigma style vernal virtual herbarium