Class XIV.— TETR ADYNAMIA. 



Order L— SILICULOSA. 



450. CAKILE. Gcertner. (Sea Rocket.) 

 Silicle sublanceolate, 4-angle(l, biarticulate, 



separating at the articulation; articulations dis- 

 similar, the lower emarginate, each 1-seeded 

 and vaiveless. 



Succulent herbaceous maritime plants, with alternate 

 leaves, after the manner of the whole class; fruiting 

 branches racemose; flowers pale purple. 



Species. 1. C * americana. Leaves carnose, entire, 

 cuneaie-oblong-, obtuse, margin toothed; both articula- 

 tions often seminiferous, uppermost ovate, acute. Hab. 

 Common on the strand of the sea-coast, and also on the 

 shores of the great North Western Lakes of the St. Lau- 

 rence. Certainly distinct from C. maiitima. Obs. Plant 

 large, much branched and subdecumbent, of a deep green, 

 no way glaucous, leaves smootii and carnose; flowers m- 

 conspicuous, small; petals oval, claws slendt r; lowtr arti- 

 culation of the fruit subterete, often equal with the upper, 

 emarginate, producing on either side a small se tact (ms 

 tooth, in fruit this species approaches Utinias, and seems 

 to evince the propriety of again unitmg these 2 genera. 



Of this small genus there are 2 other species in Lurope. 



451. DRABA. L, (Whitlow-grass.) 



Silicle entire, oval -oblong, v selves flattish, 

 parallel with the dissepiment. Style scarcely 

 an^. 



Stem leafy or partly naked, with the leaves radically 

 crowded; pubescence stelirae <r divided as in JHyssym. 



Species. 1 D verna. 2. caroliniona. Petals and style 

 rone ?,.nivaUs' A. glabella. Ph. S.nemorclis. Ob.^. Stem 

 spar ni^^y branched; radical leaves spathulate-oMong, cau- 

 line few, sessile, ovate, subdentate, raceme very long; flow- 



