126 



CRUCIFERAK. 



[VOL. II. 



7. Roripa curvisiliqua (Hook.) Bessey. 

 Curved- fruited Cress. (Fig. 1719.) 



Sisymbrium curz-isiliqua Hook. Fl. Bor. Am. i: 61. 



1830. 

 Nasturtium curvisiliqua Nutt.; T. & G. Fl. N. A. i: 



73- l8 3 8 - 



Roripa cun-isiliqua Bessey, Mem. Torr. Club, 5: 169. 

 1894. 



Annual or biennial, sparingly pubescent or gla- 

 brous, stems erect or ascending, usually much 

 branched, 6'-i8' high. Leaves oval or oblance- 

 olate in outline, pinnatifid, piunately lobed or 

 toothed, the lower i'-3' long; flowers light yellow, 

 2" broad in short racemes; pe-tals rather longer 

 than the sepals; style short; pods linear, 4 // -7 // 

 long, less than \" wide, strongly curved upward; 

 pedicels spreading or ascending, i"-2" long. 



In moist soil, Nebraska (according to Bessey), to 

 British Columbia and California. May-Aug. 



8. Roripa sessilifldra (Nutt.) A. S. Hitch- 

 cock. Sessile-flowered Cress. 

 (Fig. 1720.) 



Nasturtium sessiliflorum Nutt.; T. & G. Fl. N. A. i: 

 7V 1838. 



Roripa stssiliflora A. S. Hitchcock, Spring Fl. Man- 

 hattan, 18. 1894. 



Annual or biennial, erect, glabrous, 8 / -2o / high, 

 sparingly branched above, the branches ascend- 

 ing. Leaves petioled, the lower 3 / -4 / long, obo- 

 vate or oblong, obtuse, crenate, lobed or pinnati- 

 fid, with obtuse lobes; flowers yellow, i" broad, 

 nearly sessile ; pods very slightly pedicelled, 

 spreading or ascending, 3"-6" long, i" broad, 

 narrowly oblong; style very short; seeds minute, 

 mostly in 2 rows in each cell. 



In low grounds, Tennessee, western Illinois and 

 Iowa to Kansas, south to Florida and Texas. April- 

 June. 



9. Roripa Nasturtium (L.) Rusby. 

 Water-cress. (Fig. 1721.) 



Sisymbrium Nasturtium I. Sp. PI. 657. 1753. 

 Nasturtium officinale R. Br. in Ait. Hort. Kew. 



]'<!. 2, 4: no. 1812. 

 Roripa \aslurliiim Rusby, Mem. Torr. Club, 



3: Part 3, 5. 1893. 



Aquatic, glabrous, branching, floating or 

 creeping, rooting from the nodes. Leaves 

 odd-pinnate, of 3-9 segments, the terminal 

 one larger than the lateral, all obtuse, ovate 

 or oval, or the terminal one nearly orbicular; 

 racemes elongating in fruit; flowers white, 

 2 // -2} // broad; petals twice the length of the 

 calyx; pods 6 // -i6 // long, i // wide, spreading 

 and slightly curved upward, on pedicels of 

 about their length; seeds distinctly in 2 rows. 



In brooks and streams, Nova Scotia to Mani- 

 toba, south to Virginia and Missouri. Common 

 in most districts. Naturalized from Europe. 

 Native also of northern Asia and introduced into 

 South America and western North America. 

 Widely cultivated for salad. April-Nov. 



