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Noun: old-maid's bonnet
  1. Stout perennial of eastern and central North America having palmate leaves and showy racemose blue flowers
    "old-maid's bonnet carpeted the meadow with its brilliant blue spikes";
    - wild lupine, sundial lupine, Indian beet, Lupinus perennis

Derived forms: old-maid's bonnets

Type of: subshrub, suffrutex

Part of: genus Lupinus, Lupinus