Lignum-vitae (Guaiacum) is a biological genus in the family Zygophyllaceae (Caltrop) and order Zygophyllales.
Guaiacum coulteri
Guaiacum unijugum
Guaiacum officinale
Guaiacum sanctum
Guaiacum angustifolium
Balanites
Zygophyllum
Kallstroemia
Larrea
Fagonia
Guaiacum
Bulnesia
Tribulus