Nigella orientalis

Nigella orientalis , yellow fennel Flower, or love-in-a-mist (scientific name: Nigella orientalis) is an annual plant in the family Ranunculaceae that produces yellow flowers and is native to Western Asia. What appears to be this yellow flower is not a true flower but a calyx. The true flowers have degenerated. The central stamen is attached to the flower in an umbrella shape. The total bracts, like the leaves, elongate into thread-like bracts.
In the same genus is the blue-purple flowering Nigella damascena.

Generic name: Nigella orientalis, Scientific name: Nigella orientalis, aka Yellow Fennel Flower, Love-in-a-Mist, Origin: West Asia, Living type: Annual plant, plant height: 45-60 cm, plant width: 20-30 cm, Leaf shape: lobes, Flowering period: April - July, Flower (calyx) color: Yellow, Petals: Degenerate, Flower diameter: 3-5 cm, Fruit type: Cleavage, Fruit color: Black, Uses: Garden flower, Potted flower, Cut flower, Fruit is a dried flower.