This section is from the book "Handbook Of Hardy Trees, Shrubs, And Herbaceous Plants", by W. Botting Hemsley. Also available from Amazon: Handbook of hardy trees, shrubs, and herbaceous plants.
Annuals from the Mediterranean region having the coloured radiating scarious involucral bracts of the Everlastings, and employed for the same purposes; but the other characters are those of the Thistle tribe. Receptacle paleaceous, pappus bristly. Outer involucral bracts brown, small, scaly, imbricated. The name indicates the nature of the flower-heads, being a compound of dry, and flower.
1. X. dnnuum. - A branching plant from 1 to 2 feet high, with linear cottony leaves and solitary terminal purple, pink or white flower-heads on long peduncles.