Class XIV.— TETRADYNAMlii 



Order I.— SILICULOSA. 



450. CAKILE. Gcertner. (Sea Rocket.) 

 Silicle sublanceolate, 4-ang]ed, biarticiilafe, 



separating at the articulation; articulations dis- 

 similar, llie lower emarginate, each 1-seeded 

 and valveless. 



Succulent herbaceous maritime plants, with alternate 

 leaves, afier the manner of the whole class; fruiting 

 branches racemose; flowers pale purple. 



Specixs. 1- G. * americana. Leaves carnose, entire, 

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

 tions often seminiferous, uppermost ovate, acute. Hab. 

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

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

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

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

 no way glaucous, leaves smooth and carnose; flowers in- 

 conspicuous, small; petals oval, claws slender; lower arti- 

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

 emarginate, producing on either side a small setaceous 

 tooth. In fruit this species approaciies Bunias, and scenes 

 to evince the propriety of again uniting these 2 genera. 



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



451. DRABA. i. (Whitlow-grass.) 



Silicle entire, oval-oblong, valves flattish, 

 parallel with the dissepiment. Style scarcely 

 any. 



Stem leafy or partly naked, with the leaves radically 

 crowded; pubescence stellate or divided as in ^ilyssvm. 



Species. 1 D verna. 2. carolininna. Petals and stvlP 

 none. 2>. nivalis. A.glaheUa. Ph. S.nemoralis. Obs. Slrai 

 sparingly branclied; radical leaves spaihulute-oblong, cau- 

 ilne fewj'scssile. ovate, subdentate, raceme very long; tioNv- 



