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