Pseudomuscari chalusicum, the Chalus grape hyacinth, is a species of flowering plant in the squill subfamily Scilloideae of the asparagus family Asparagaceae, native to Iran. Chalus is a county in northern Iran. Growing to about 15cm (06inches) in height, it is a bulbous perennial with floppy, curved leaves sitting close to the ground, and small clusters of bell-shaped flowers on erect stems, appearing in mid-spring. The flower colour is pale blue at the tip, shading downwards to a darker blue. Unlike some other Muscari species, it does not spread rapidly.[1]
It is still known under its synonym Muscari pseudomuscari. In cultivation in the United Kingdom it has gained the Royal Horticultural Society's Award of Garden Merit.[2] [3] It requires a sunny position in well-drained soil, and is hardy in most places in the UK - down to about -15cm (-06inches).