153 



** Cotyledons Jial, incunihent, 



334. SISYMBRIUM. Pod nearly cylindrical. Stigma 

 capitate, notched. 



339. HESPERIS. Pr;r/ iiiaccurately quadrangular. Stig- 

 ma nearly sessile, of 2 converging lobes. Cal. closed; 

 with 2 protuberances at the base. Seeds not bor- 

 dered. 



336. ERYSIMUM. Pod quadrangular. Stigma capi- 

 tate, notched. 



*** Cotyledons folded, incumbent. 



342. BRASSICA. Pod nearly cylindrical, beaked, with 



2 valves. Seeds nearly globular. Cal. closed. 



343. SIN A PIS. Pod nearly cylindrical, somewhat beak- 



ed, with 2 valves. Seeds nearly globular. Cal. 

 spreading. 



344. RAPHANUS. Pod tumid, imperfectly jointed, 



without valves. Seeds globular. 



This whole class, except the exotic genus Cleome, which 

 has been forced into it, constitutes an entirely natural 

 order, the CrucifercB of recent authors ; which is indeed 

 so natural and distinct, that we can hardly trace the least 

 affinity between it and any other tribe. The artificial sy- 

 stem leaves it undisturbed ; not recjuiring the separation of 

 any genus from the rest, nor properly introducing any that 

 does not belong to them ; for whatever may become of 

 Cleome, it ought not to encumber this class, to which it 

 has no natural affinity, nor has it even the artificial cha- 

 racter, except in a very few species. 



Crncijercc. Juss. 63. DeCand. Syst. v. 2. 139. SiliquosiC. 

 Linn. 39. 



Flo'iSccrs all complete and perfect, having a calijx ant! corolld, 

 with stamens and pistil, m every individual. 



Calj/x inferior, ot* 4 ovate-oblong, concave, obtuse, usually 

 converging leaves, opposite in pairs; })rominent at the 

 base; very sleek within ; deciduous. 



Corolla what is termed cruciforni, Inlrod.f. 15(), 157, con- 

 sisting o{ \ jh'hds, alternate with the calyx, almost inva- 

 riably regular and cMjual: their cla\<s erect, tapering 



