Water-cress. Corn-salad 131 



situation would be better understood ; but under Nasturtium 

 the proper combination of names apparently has not been 

 made, any more than it has under Cardaminum ; in either case, 

 therefore, a new name must result if the plant is removed 

 singly from Sisymbrium. If the plant is to be associated with , 

 others in a genus, the clearest destination seems to be in 

 Roripa (for reasons not necessary here to explain), and the 

 plant is so disposed of in this book. The synonymy may be 

 displayed as follows: Roripa Nasturtium-aquatioum, Hayek, 

 Sched. Fl. Stir. Exsicc, 3.14 lief. (Dec., 1905) 22. Sisymbrium 

 Nasturtiiim-aguaticum, Linn. Sp. PI. 657. Cardaminum Nastur- 

 tium,, Moench, Meth. 262. 1794. Baeumerta Nasturtium, 

 Gartn. Mey. & Scherb. Fl. Wett. ii, 467. 1800. Nasturtium 

 offlcinale, E. Br. in Ait. Hort. Kew. ed. 2, iv, 110. 1812. Nas- 

 turtium aquaticum, Wahl. Svensk. Bot. t. 624. 1823-5. Carda- 

 mine Nasturtium, O. Kuntze, Kev. Gen. i, 22. 1891. Roripa 

 Nasturtium, Beck. Fl. N. CEst. ii, 463. 1892. Radicula Nastur- 

 tium-aquaticum, Britt. & Rendle, Brit. Seed PI., 3. 1907. Baeu- 

 merta Nasturtium-aquaticum, Hayek, Fl. Steierm, i, 498. 1909. 

 Perennial, creeping or floating, smooth, emitting long white 

 roots at the modes : leaves odd-pinnately compound, of 1 to 4 

 lateral pairs; terminal lobe oblong to orbiculate, entire, undu- 

 late or obscurely toothed ; lateral leaflets usually much smaller : 

 flowers white, in very short terminal racemes that elongate 

 in fruit, small : fruit a curved linear long-pedicelled pod : seeds 

 small (about 1 mm. across), brown, oblong-orbicular, tubercu- 

 late, weighing less than 1 mg., and holding vitality about 5 

 years. — Europe; widely naturalized in this country in ditches, 



rills and pools. 



CORN-SALAD 



Corn-salad or fetticus is used both as salad or potherb, 

 chiefly the former, the thick bunch or rosette of root leaves 

 being employed for the purpose. It is a hardy cool-season 

 plant, of easy culture except in hot weather. 



It may be grown as a mid-spring crop from seed sown 

 the same season; as a fall crop from seeds sown in late 



