hoary alyssum


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Noun1.hoary alyssum - tall European annual with downy grey-green foliage and dense heads of small white flowers followed by hairy podshoary alyssum - 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 weed
Berteroa, genus Berteroa - hoary alyssum
herb, herbaceous plant - a plant lacking a permanent woody stem; many are flowering garden plants or potherbs; some having medicinal properties; some are pests