Picramniaceae, a new rosid family, is established. A diagnosis and bri
ef descriptions of the two genera (Picramnia and Alvaradoa) constituti
ng the family are provided. The Simaroubaceae are recircumscribed to i
nclude only members of the subfamily Simarouboideae, excluding Harriso
nia but including Leitneria (Leitneriaceae).