TETRADYN — SILIft. 201 



One to one foot and a half high. Stout, furrowed, and branched, 



glabrous. Flowers yellow, 

 2. B. prcecox {early fVinter- Cress), lower leaves lyrate upper 



ones pinnatifid their segments linear oblong and entire. B. B. 



t. 1 129 {Eryshniim prcecox). 

 Hab. St. Bernard's well, Edinb., Mr. Arnott. Fl. summer months, <J . 

 One to two feet high ; slenderer than the last in eveiy part. Flowers 



very small, yellow. Pods longer. 



15. NASTURTIUM. 



1 . N. officinale (IVater-Cress), leaves pinnate, leaflets ovate suV)- 

 cordate sinuato-dentate. Light/, p. 350, E. B. i.S55 (Si- 

 symhrium Nasiuriiiim). 



Hab. Brooks and rivulets, frequent. Fl. July. 11 . 



A well known aquatic, and an excellent sallad. Lower leaves large, 



of 5 — 7 distant leaflets, the terminal one the largest and roundest; 



cauline leaflets subovate, all rather succulent, glabrous, more or 



less waved or toothed. Flowers white. Puds about 1 inch long, 



patent. 



2. N. sylvestre {creeping Nasturtium), leaves pinnate, leaflets 

 lanceolate incised those on the uppermost leaves nearly entire. 

 Light/, p. 3.') 1, and E. B. t. 2324 {Sisymbrium sylv.). 



Hab. Water-sides and waste places, but not common, Dr. Parsons 

 and Sibbald. In several wet places on the side of the water of Ea, 

 below Kirkmichael house, Lighff. FL July, Aug. 1/ , 



Roots much creeping. Stem I foot high, angular, branched. Flowers 

 yellow. Pet. much longer than the caL Pods .short, patent or 

 curved a little upwards. 



3. N. terrcsire {Marsh Nasturtium), leaves lyrato-pinnatifid 

 unequally toothed glabrous, root simply fibrous, petals not lon- 

 ger than the cal. Light f. p. 352 {Sisymbrium amphibium a.). 

 E. B. t. 1747 {Sisym,brimn terrestre). 



Hab. Watery places. Figget Whins, Edinb., G. Don. Edge of 

 Kinghorn Loch, Mr. P. Neill. Banks of Frankfield Loch, Glasg., 

 Hopk. N. bank of Loch Leven, Mr. Arnott. Appin, Capt. Car- 

 michael. jFZ. June, Sept. ©. 



One foot high, branched. Distinguished readily from the last by its 

 pinnatifid, not pinnated, leaves, the minute (yellow) petals and 

 the more turgid pods. 



4. N. amphibium {amphibious Nasturtium), leaves oblong pin- 

 natifid or serrated, root simply fibrous, petals longer than the 

 cal. Light/, p. 352 {Sisymbrium amphibium /3). E.B, 

 t. 1840 {Sisymbrium amphibium). 



Hab. Watery places, occasionally. Duddingston Loch, Mr. Yalden. 



Banks of the Clyde, frequent; in the marsh beyond Fossil ; and 



Bardowie Loch, near the house, Glasg., HopJi. 

 Two to three feet high, branched. If any leaves grow under water, 



they are deeply pinnatifid ; deeply serrated otherwise. Flowers 



yellow. Pods short, small, but turgid, crecto-patcnt. 



