
• (n.) Any herb of the cruciferous genus Lepidium, especially the garden peppergrass, or garden cress, Lepidium sativum; -- called also pepperwort. All the species have a pungent flavor. • (n.) The common pillwort of Europe (Pilularia globulifera). See Pillwort.
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any of 230 species of herbs constituting the genus Lepidium, of the mustard family (Brassicaceae), distributed throughout the world. Many, such as L. ...
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http://www.britannica.com/eb/a-z/p/42

(Lepidium) This vegetable is commonly known as Peppergrass, Curled Cress and Garden Cress. The Curled Cress grows quickly and produces medium green leaves, which are cut deeply giving them a lacy look. They have a pungent taste and are used in small amounts in salads or cold stuffings, or as a garnish. It makes a suitable substitute for watercress ...
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http://www.encyclo.co.uk/local/10004
Pep'per·grass` noun (Botany) (a) Any herb of the cruciferous genus
Lepidium , especially the garden peppergrass, or garden cress,
Lepidium sativum ; -- called also
pepperwort . All the species have a pungent flavor.
(b) The common pillwort of Europe (
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http://www.encyclo.co.uk/webster/P/50
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