Dermatophyllum secundiflorum is a species of flowering shrub or small tree in the family Fabaceae[2] that is native to the Southwestern United States (Texas, New Mexico) and Mexico (Chihuahua and Coahuila south to Hidalgo, Puebla, and Querétaro).

[2] Although "mescalbean" is among the plant's common monikers, it bears no relation to the Agave species used to make the spirit mezcal, nor to the peyote cactus (Lophophora williamsii), which contains the hallucinogenic alkaloid mescaline.

[7] Extremely fragrant purple flowers, resembling the smell of grape soda, are produced in large clusters in March and April.

[2] D. secundiflorum is a popular ornamental plant due to its showy flowers and orange seeds.

This plant is psychoactive but is also extremely toxic due to the presence of the bicyclic alkaloid cytisine, which is chemically related to nicotine.