The pignut or hickory (Carya glabra of family Juglandaceae).
Conopodium majus, a tuberous plant of the Apiaceae.
Bunium bulbocastanum (black cumin) of the Apiaceae.
Certain rushpea, particularly Hoffmannseggia glauca (syn. Hoffmannseggia densiflora) Indian rushpea, of the Fabaceae.
Hyptis suaveolens of the Lamiaceae.