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8. Sisymbrium L. Hepvce-Mostarp. 
Siliqua linear, with concave, 3-nerved valves. 
Seeds o, 1-seriate in each valve. 
1. 8. orrictnaLe Scop. Branches divari- 
cate; siliqua closely appressed to the axis of 
the raceme; petals yellowx—©. Common ali 
the year round. 
Ballast weed from Europe. 
2. §. acurancuLum DC. Branches ascend- 
ing; siliqua erect; petals yellow.—©. Mission 
Dolores. SanJose. Summer. 
Ballast weed, native of the Mediterranean re- 
gion. 
3. SS. BEFLEXUM Nutt. Branches but few; 
siliqua deflexed; petals yellow, white or red.— 
©. Presidio. Saucelito. Alameda. Summer. 
9. Cakile Tourn. Sea-Rocker. 
Fruit a 2-articulate lomentum. 
1. OC. Americana Nutt. Petals rose-colored. 
©. Berkeley salt marshes. Summer. 
10, Barbarea B. Br. WINTER-CREsS. 
Siliqua linear, 4-angular with concave, 1- 
nerved valves. Seeds o, compressed, 1-seriate 
in each valve. Flowers yellow. 
1. B. vunearis R. Br.—2. San Mateo. 
Summer, 
