672 80. CRUCIFER^. PLex.thaL 



Silic. 2-cellecl, 2-valved, not nicked, 

 keJed; cells 2-seeded;j/?/a7n. simple Nasturtiolum. 438» 



Silic. 2-celled, 2-valved, nicked, keeled ; 

 cells 2-seeded;^7a77zen/5 scale-bearing .. Teesdalia, 439. 



Silic. 2 celled, 2-valved, keeled ; 

 cells 1-seeded ; petals equal Lepidium. 44<1. 



Silic. 2-celied, 2-valved, nicked, keeled ; 

 cells 1 -seeded ; petals 2 larger Iberis. 440. 



Silic. 2-celled, 2-valved, nicked, keeled : 

 cells many-seeded Thlaspi. 437. 



b. Siliquosa. Pericarp long, many-seeded. 



b. 1. Cotyledons conduplicate ; seeds globular ; 

 siliqua cylindrical. 



Siliqua valveless, nearly jointed j 

 cells 2 ; sepales closed Raphanus. 430» 



Siliqua valveless, nearly jointed ; 

 cell 1 ; sepales closed Raphanistrum. 431. 



Siliqua 2-valved, nearly 2-jointed ; 

 cells 2 ; sepales spreading Sinapis. 429. 



Siliqua 2-valved ; beak barren 

 or 1-seeded ; sepales closed Brassica. 428. 



b. 2. Cotyledons conduplicate ; seeds compressed ^ 

 siliqua 2 or 4!-angled. 



Cot. incumbent, flat ; sepales upright ; 

 stigma sessile, 2-lobed ; siliq. 2 or 4-sided Hesperis. 427. 



Co/, incumbent; 5epa/e5 upright; 

 stigma-lohes connivent; longer jilam. dilated 



Matthiola. 426. 



Cot. incumbent; sepales upright; 

 stigma headed; siliq. 4-sided; seed 

 not margined Erysimum. 424, 



Cot. incumbent, flat ; sepales spread ; 

 stigma headed; siliq, 4-sided; seed 

 not margined Sisymbrium. 423. 



Co/, accumbent; sepales spread; 

 siliq. roundish ; valves convex, ribless Nasturtium. 422. 



Cot. accumbent; sepales closed, 

 bagged at the base; stigma 2-lobed . . Cheiranthus. 425. 



