Autumn snowflake is a bulbous perennial native to Spain, Portugal, and the Mediterranean region. It blooms in late summer to fall, bearing nodding, bell-shaped, white flowers atop 10-inch stems. The strap-shaped, glossy dark green leaves, which emerge after the flowers begin to bloom, create an upright, vase-shaped clump of foliage which persists into winter. Plant the bulbs in spring in well-drained soil in full sun to part shade 3-4 inches deep. 'September Snow' is a selection with pure white flowers. This species was formerly placed in the genus Leucojum until molecular studies found that it was not closely related.