Order 13.— THE CRUCIFERS. 



161 



itamens 6, 2 of tliera on opposite sides shorter than the rest ; an 



ovarij of 2 united carpels, forming in fruit a 



silique or silicle^ with 2 cells and few or many seeds; 



seeds without albumen, the large evihnjo variously bent and folded. 



Note. — Under this large Order, as under others, we present to our young readers a complete 

 analysis, by which tliey may trace to its genus any 3[iistardicort growing in the United States 

 But as the genera are so nearly alike, great care and close observation will be needful In avoiding 

 mistakes. The plants for examination must be in fruit as well as in flower. 



Fig. 893. Flower of White Mustard. Fiff. 394. Same, with its parts separated. Fig. 395. A 

 ellique, ripe and open. Fig. 396. Draba verna. Fig. 397. A pod open. 



Analysis of the Genera. 

 * Garden plants cultivated for ornament or art. 



1 Fruit a silique or long pod (§ 3G3) 5 



1 Fruit a siliclo or short pod (§ 3()4) 2 



2 Silicle 2-celled, with 2 or more seeds 3 



2 Silicle 1-celled, with one seed only. Woad. Isa''ti8. 



3 Petals all equal ... .4 



3 Petals unequal, the 2 outside ones larger. Candij-tvft. Ibi/ris. 1 



4 Some of the stamens toothed. Gardens. Madwort. Alys'sum. 



4 Stamens all toothless. Silioles very large and thin. Satin-Jivwer. Lu.na'ria. 



5 Seeds flat. Stigma rounded or head-shaped. Wall-flower. CuKntAN'Tiics. 



5 Seeds flat. Stigmas 2-horned, spreading. Stock. Mattiii'ola. 



6 Seeds egg-shaped. Stigpaa with 2 converging lobes. liocket. HksYirm, 



