allium cristophii

Nevertheless, the gravel garden looked sprightly, with harmonious colour provided by gauras, verbascums, grasses, the foliage of santolinas, ballotas and bergenias, and the seed heads of Allium cristophii.

Allium cristophii, also known as A. albopilosum and sometimes called the Star of Persia, has clusters of particularly needlelike pale purple petals, each cluster radiating around a green center, but all of those listed by Mr. Van Etten are possibilities.