22 6. CRUCIFERiE. 



3. Nasturtium R. Br. Water Cress. 



1. 2V. officinale (R. Br.) ; 1. pinnate, Its. ovate or oblong sub- 

 cordate sinuate-dentate, pet. twice as long as calyx {white), pods 

 linear. — E. B. 855. R. ii. 50. — Pods patent. Very variable. 

 When growing out of water it is slender vpith small leaves and is 

 N. microphyllum (R.); when remarkably luxuriant, many feet in 

 length, the stem often nearly an inch thick and the leaves very 

 large and resembling those of a Slum, it is N. siifoUum (R.). — 

 Brooks and ditches. P. VI. VII. Water Cress. 



2. N. sylvestre (R. Br.) ; root creeping, 1. deeply pinnatifid, Its. 

 oblong or lanceolate cut, uppermost 1. often nearly entire, pet. 

 twice as long as the calyx (yellow), pods Unear. — E. B. 2324. — 

 Fr.-stalks patent ; pods patent or ascending, variable in length 

 usually as long as their stalks sometimes shorter. — N. anceps 

 (Bab.) is not separable from this species. — River banks and wet 

 places. P. VI.— VIII. 



3. N. palustre (DC.) ; root fibrous, lower 1. lyrate, upper 1. 

 deeply pinnatifid. Its. oblong toothed, pet. as long as the calyx, 

 pods oblong tm-gid. — N. terrestre Sm., E. B. 1747. — Fl. small. 

 Fr.-stalks patent or even deflexed ; pods ascending, short, about 

 as long as their stalks. — Wet places. P. VI. — IX. 



4. Barbarea R. Br. Rocket. 



1. -B. vulgaris (R. Br.) ; lower I. lyrate, upper pair of lobes 

 equalling the breadth of the large roundish subcordate terminal 

 lobe, uppermost 1. undivided toothed, young pods obliquely erect. 

 — E. B. 443. R. ii. 47- — Pet. twice as long as the calyx. Flower- 

 ing raceme lax. Pods straight. — ;3. arcuata ; young pods patent 

 upon nearly horizontal pedicels. — In damp places. B.? V. — VIII. 

 Yellow Rocket. 



2. B. striata (Fries) ; lower I. lyrate, upper pair of lobes small 

 much shorter than the breadth of the large oblong-ovate terminal 

 lobe, uppermost 1. undivided toothed, pods adpressed, style slender. 

 — R. ii. 47. B. parvifiora Fries. — Pet. half as long again as the 

 calyx. Flowering raceme close. Fl. much smaller than in B. 

 vulgaris. Pods straight. Lateral lobes of the lowermost 1. very 

 small, often obsolete. — Between Sheffield and Halifax and be- 

 tween Weedon and Blisworth, plentifully. Mr. Borrer. York. 

 B.? v.— VIII. E. 



3. B . prcEcox (R. Br.) ; lower 1. imparipinnate with large lobes, 

 upper pair of lobes equaUing the breadth of the subcordate ter- 

 minal lobe, uppermost I. pinnatifid with linear-oblong entire lobes, 

 style short and thick.— JB.B. 1129. R. ii. 49. B.patula Fries — 

 Fl. moderate. Raceme close. Pods patent. Lower 1. usually 

 interruptedly pinnate. — South of England. B. V. — VII. E. 



