dusty miller

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun Any of various low-growing plants chiefly in the composite family, having woolly silver-gray foliage.

from The Century Dictionary.

• noun Same as miller, 3.
• noun The auricula, Primula Auricula: so called from the whitemealiness upon the leaves.
• noun The Senecio Cineraria, a common cultivated foliage-plant which is covered with white tomentum.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun idiomatic A formulaic phrase for a miller, related to the dust generated in the milling process.
• noun One of several species of plants with leaves of a dusty appearance: Centaurea cineraria, Senecio cineraria, and Lychnis coronaria.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun an old cottage garden plant of southeastern Europe widely cultivated for its attractive white woolly foliage and showy crimson flowers
• noun stiff much-branched perennial of the Mediterranean region having very white woolly stems and leaves
• noun a plant having leaves and stems covered with down that resembles dust
• noun herb with greyish leaves found along the east coast of North America; used as an ornamental plant
• noun shrubby perennial of the Canary Islands having white flowers and leaves and hairy stems covered with dustlike down; sometimes placed in genus Chrysanthemum