22 6. CRUCIFERJS. 



3. NASTURTIUM R. Br. Water Cress. 



1. N. 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 with small leaves and is 

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

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

 large and resembling those of a Slum, it is IV. siifolium (R.). 

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



2. IV. 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 linear. E. B. 2324. 

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

 usually as long as their stalks sometimes shorter. IV. anceps 

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

 places. P. VI. VIII. 



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

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

 pods oblong turgid. IV. 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. stricta (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. parviflora 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 equalling the breadth of the subeordate ter- 

 minal lobe, uppermost 1. pinnatifid with linear-oblong entire lobes, 

 style short and thick. E. 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'. 



