Nastdrtidm. CRUClFERiE. 73 



very small. Petals linear, scarcely as long as the calyx. Silique 6-8 lines 

 long, straight or a little incurved,' pointed with a short but distinct style : 

 stl^a capitate. Pedicels about one-third as long as the silique. Seeds very 

 numerous. 



3. N. lijratum (Nutt. ! mss.) : "leaves pinnatifid or lynite ; the segments 

 oblong-lanceolate, incisely serrate or angularly toothed ; silique linear, com- 

 pressed, more than twice the length of the pedicel, somewhat spreading, 

 abrupt at the apex ; style very short ; ronmion peduncle flexuous." 



" Banks of the Oregon," AV//a// .'—Scarcely a foot high, glabrous. Leaves 

 somewhat variable m the toothing and sefratures. Racemes paniculate 

 in fruit. Flowers minute. Siliques about three-fourths of an inch long, 

 slightly curved ; the valves obtuse at the summit. Style scarcely half a Ime 

 long, not clavate. Pedicels 1-2 lines in length. 



4. N. sess'iliflorum (JSun. \ mss.): '"leaves cuneate-obovate, obtuse, re- 

 pandly toothed or nearly entire; siliques subsessile, linear-oblong, obtuse, 

 tipped with the nearly sessile stigma," 



"Banks of the Mississippi," Nnttall ; Kentucky? Fafnrsqvc.'—Gla- 

 brous. Leaves 1-2 inches long ; those of the stem merely toothed, or almost 

 entire, attenuated at the baseT Racemes in fruit elongated. Blowers mi- 

 nute. Siliques nearly half an inch long, on extremely short peduncles: 

 valves obtuse. Style very short and thick. Cotyledons o= 



5. N. sinualum (Nutt. ! mss.): " decumbent ; leaves pinnatifid ; segments 

 lanceolate, subserrate or toothed on the lower margin ; pedicels spreading or 

 recurved, longer than the oblong acute silique ; style nearly one-third the 

 length of the silique. 



"Banks of the Oregon and its tributaries; also in Arkansas.— Glabrous. 

 Leaves all equally pinnatifid ; the terminal segments more or less confluent. 

 Flowers rather large, bright yellow. Sepals ovate. Petals oblong-ovate. 

 Silique about one-third of an inch long, slightly curved." Nutt. Cotyledons o^ 



6. N. cu7-visiliqiia (Nutt. mss.) : erect, branching ; leaves lanceolate, pin- 

 natifid, acute, somewhat clasping at the base ; lobes linear-lanceolate and 

 spreading, the uppermost nearly entire ; raceme in fruit elongated ; siliques 

 linear, acuminate, falcate, twice as long as the pedicels. Hook. Ji. Bor.-Am. 



1. p. 61. (sub Sisymb.) 



North West Coast ; in sandy soil, near streams. Dousrlas ; on the Ore- 

 gon, iV/f^a/L' — (I) Stem about a foot high, minutely pubescent. Flowers 

 small, corymbed. Silique smooth, about an inch long, somewhat torulose. 

 Seeds in a double series. TIook.~Om specimen of this plaut, from Mr. Nut- 

 tall, differs in several respects from the description of Hooker. The lobes of 

 the leaves are ovate-lanceolate. The siliques (not quite mature) are oblong, 

 arcuate, and rather shorter than the pedicels, which are recurved at the base, 

 and spreading. The flowers are larger than in any of the preceding species 

 of this section. Cotyledons o= 



7. N.palustre (DC): leaves pinnately lobed, clasping and ciliate at the 

 base ; lobes confluent, toothed, glabrous ; root fusiform; petals as long as the 

 sepals; silique spreading, obtuse at each end, somewhat turgid. — DC. syst. 



2. p. 191 ; Hook. fi. Bor.-Am. 1. p. 39 ; Ckavr. ^ Schlecht. in Linncea, 1. 

 p. 15. 



Wet places, Arctic America to New-Orleans ! and west to Oregon ! June- 

 Aug. — U Stem 1-2 feet high, erect, glabrous, branching above. Leaves 2-3 

 inches long; lobes oblong-lanceolate. FloAvers very small. Peduncles of 

 the fruit 2-4 lines long, slender, spreading almost horizontally. Silique 3-4 

 lines in length, more or less ovate or ovate-oblong, slightly curved, crowned 

 Avith a very short style. 



8. N. amphibium (R. Brown) : leaves oblong-lanceolate, pinnatifid or ser- 



10 



