22 CRVCIVERJE, [Cakile. 



Templeton. Fl. May. The smallest of the species, with very 

 angular and stalked leaves. 



4. C. Armoracia, Linn. Horse radish. Pouch oblong; 

 stigma dilated, nearly sessile ; radical leaves oblong on long foot- 

 stalks, crenate ; cauline ones lanceolate, serrate, or entire. Br. 

 Fl. \.p. 298. E. FL v. iu. p. 176. E. Bot. t. 2323. 



Apparently wild in various places near Dublin, but probably only 

 the outcast of gardens. Meadows near Mallow ; Mr. J. Drummond. 

 FL May. %. 



Tribe III. Thlaspidece. De Cand. 



Silicula dehiscing ; septum very narrow ; valves keeled, navicular. 

 Seeds oval, sometimes bordered. Cotyledons flat, accumbent, at right 

 angles with the septum. 



9. THLASPI. Linn. Penny-cress. 



Pouch laterally compressed, emarginate. Valves winged at the 

 back, many-seeded. Cotyledons accumbent (O=z). Name 

 from 0\ata, to flatten, on account probably of its compressed 

 seeds or seed-vessels. Tetr adynamia. Silicnlosa. 



1. T. arvense, Linn. Penny-cress or Mithridate Mustard. 

 Pouch orbicular with a broad longitudinal wing ; seeds concen- 

 trically striated ; leaves oblong, arrow-shaped, toothed, gla- 

 brous. Br.Br. Fl. 1. p. 295. E. FL v. iii. p. 171. E. Bot. 

 t. 1659. 



Fields, and by road s ides, but not common. Side of the road be- 

 tween Ballybracken and Kilkenny, and in a field between Mrs. Han- 

 nington's house and the shore, south side of the Hill of Howth, where 

 it was first noticed by Major Percy Pratt. In corn fields near Dun- 

 drum, County of Down ; Mr. Templeton. Fl. June, July. 0. One 

 foot high, branched above. Flowers extremely small, white. Pouch 

 very large, with unusually broad wings. 



Tribe IV. Cakilinea. De Cand. 



Siliqua or silicula separating transversely into joints, with one or 

 two cells, and one or two seeds. Seeds not bordered. Cotyledons 

 flat, accumbent, parallel with the septum, when there is one. 



10. CAKILE. Gcertn. Sea Rocket. 



Pouch angular, of two, 1 -seeded, indehiscent joints, the upper 

 joint deciduous, bearing an upright, sessile seed, the lower 

 one (sometimes abortive) pendulous. Cotyledons accum- 

 bent (Ozn). Name, an old Arabic word, applied probably 

 to this, or some allied genus. Tetradynamia. Siliculosa. 



1. C. maritima, Willd. Purple Sea-Rocket. Joints of the 

 pouch two-edged, the upper one with two teeth at the base ; 



