Botanical name: Allium caesium Family: Alliaceae (Onion family)
Synonyms: Allium urceolatum, Allium renardii
Blue Onion is a beautiful alpine plant characterized by its dark blue flowers, in a lax umbel with slender spreading flower-stalks twice as long as the flowers. Umbels are 3-4 cm across, flowers about 5 mm long. Petals are narrow-elliptic pointed, longer than the stamens. Stamen filaments have broad-elliptic bases. Spathe has elliptic lobes shorter than the flower-stalks. Leaves are 1-2 mm broad, shorter than the 15-30 cm tall flowering stem. Blue Onion is found in the Himalayas in Himachal Pradesh and C. Asia, at altitudes of 2400-3300 m. It is common in Lahaul. Flowering: June-July.
Identification credit: Nongthombam Ullysess
The flower labeled Blue Onion is ...