Pasithea caerulea
A heavenly blue flowered relative of Anthericum, this hails from the drier parts of Chile, where it is widespread. Airy heads of royal-blue starry flowers on wiry stems to 60cm high in summer, over keeled, grass-like foliage. Apparently fully hardy, though I'd give this a well drained sunny position where it will be semi-dormant in summer.