Ordek 13.— the 0'j,UCIFBRS. 



161 



stamens 6, 2 of them on opposite sides shorter than the rest ; an 



(Aa/ry of 2 united carpels, forming in fruit a 



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



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



NoTB. — 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 Musiardwort growing in the United States. 

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

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



Fig. S98. Flowerof White Mustard. Mg.89i, Same, with its parts separated. Mg.295. A 

 siliqne, ripe and open. Mg. 896. Draba verna. Mg. 897. A pod open. 



Analysis of the Genera. 

 * Garden plants cultivated/or ornament or art. 



1 Fruit a silique or long pod (§863) 5 



1 Fruit a siliole or ehort pod (§ 864) .... 2 



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



2 Silicle l-celled, with one seed only. 



8 Petals all equal 4 



3 Petals unequal, the 2 outside ones larger. 

 4 Some of the stamens toothed.' Gardens. 

 4 Stamens all toothless. Silicles very large and thin. 



5 Seeds flat. Stigma rounded or head-shaped. 



Wood. Isa'tis. 



CJandy-i/uft. Ibe'kis. 1 

 Madwort. Alys'sum. 

 Satm-flowor. Luna'kia. 2 

 Wallrflower. Cheikan'thbs. 



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



5 Seeds egg-shaped. Stigma with 2 oonveiging lobes. Rochet. Hes'peki*, 



