CABBAGE FAMILY 



37 



3. R. palusiris (Marsh Yellow Cress). — Root fibrous; leaves 

 lyrate> ^^\nr\^X\^^. flowers \ in, across ; petals not longer than calyx ; 

 pods oblong= — Watery places. — Fl. June— October, 



4. Barbarea (Winter Cress). — Erect, branched, glabrous, 

 biennial herbs ; stem angular ; petals yellow, clawed ; pods straight, 

 stiff, 4-angled, acuminatCc (Dedicated to St. Barbara,) 



RADicuT.A NASTi RTiUM-AQUATicuM {Common WatercressX 



I. B. vulgaris (Common Winter Cress). — I^ower leaves lyrately 

 pinnate, the terminal lobe roundish ; upper ^ obovate, toothed ; 

 raceme lax ; flowers small ; buds smooth ; daw of petals whitish. 

 Common in moist waste ground, where it may be readily recog- 

 nised by its smooth, shining, dark, green leaves^ and its erect, 

 angular stem, bearing numerous bright yellow flo7vers. Two 

 forms, differing chiefly in the size of their petals and the direc- 

 tion of their pods, are distinguished as B. stricta and B. inter- 



