Hognut

Hognut or pignut can mean any of a number of unrelated plants:

Bunium bulbocastanum (Black Cumin) or Conopodium majus (Kippernut) of the Apiaceae
rushpeas, particularly Hoffmannseggia glauca (Indian Rushpea) and Hoffmannseggia densiflora, of the Fabaceae
Carya glabra (Pignut Hickory) of the Juglandaceae
Hyptis suaveolens (Chan) of the Lamiaceae

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