Brassicaceae: Mustard Family — Fringepods & Peppergrass
Members of the mustard family all have four petals, usually in a cross shape (hence Cruciferae; the old name for the family). With some groups, the flowers are quite similar, so it helps to pay close attention to the fruits. This is especially true for the mustards themselves (Brassica, Hirschfeldia, Sisymbrium, Caulanthus and Turritis).
Fruits in the Mustard family are of two kinds, siliques and silicles. Siliques are at least twice as long as they are wide, while silicles are less elongated. Some silicles are erect and appressed to the stem, others grow outwards and curve upwards, or outwards and curve downwards. All the plants on this page have more or less flattened silicles, of different shapes and degrees of hairiness, some notched at the tip, some not.