»6 



CRUCfFER/E 



pinnate; leaflets 7 — 13, ovate or oblong, sub-cordate, sinuate-den- 

 tate, glabrous. — Abundant in rivulets and extensively cultivated as 

 a salad. The only plant likely to be mistaken for it by watercress 

 gatherers, Apium nodiflbrum (see p. 204), has hollow leaf-stalks, 

 and serrated leaflets, which watercress has not. (Name from 

 nasus tortus? a distorted nose, on account of the pungent pro- 



cheirXnthus chei'ri (JVailfloiver). 



perties of the genus. The possession of similar properties 

 caused a widely dissimilar plant, the Tropozolum of our gardens, 

 to be also originally called Nasturtium.)— Fl. May — October. 

 Perennial. 



** Flowers yellow 

 2. R. sylvestris (Creeping Yellow Cress). — Rhizome creeping j 

 haves deeply pinnati fid; leaf-segments lanceolate ; flowers minute ; 

 petals twice as long as the calyx ; pods linear. — Watery places. — 

 FL June — September. Perennial 



