hoary alison

Thesaurus

Noun

1.hoary alison - tall European annual with downy grey-green foliage and dense heads of small white flowers followed by hairy pods; naturalized in North America; sometimes a troublesome weedBerteroa incana, hoary alyssumBerteroa, genus Berteroa - hoary alyssumherb, herbaceous plant - a plant lacking a permanent woody stem; many are flowering garden plants or potherbs; some having medicinal properties; some are pests