Sisymbrium. CKICIKKK.E. 13g 



S. canescens, Xi n. ('I'ansy Mistaui..) Annual, iin.Toim-tonu iiIuIum- t., pulvt-rulunU 

 gl;ui(liil:u- ..r nucly glahnite an.l Rreeu : li-aves very varial.lr, alwavs Hi.ely .linMHU'd. ihiu- 

 uish, and deliiate: se<,Mnents small, elliptual, or Kspwially in tlic uppiT l.-avt-H linfar-«.lilun.' • 

 racenu-s one to several, erect; pedicels 3 to 5 lin.-.s lonjjj. spreudinj,' : IIowith Kiuall.tli- h|Kim^ 

 late petals eciualliug or somewhat exceeiliug the short .d.long nepals : capsule 4 to ti lin<<M 

 lonj-:, erect or ascending, glabrous or neiu-ly so; seeds roughened. — (;.-n ii. r,8 ; DC. .Svi.t. 

 ii. 475; Gray, Gen. 111. i. 152, t. 64. .S'. Soj>/,i,i, I'ursii. Kl. ii. 44(), n.-t Linn. ; Gray. i'r<K-. 

 Acad. Philad. 186.3, 57, in part. S. ljr,u/,,jcurj,<m, Kidiards in Kranklin iM.Joun'i ed I 

 App. 744 (reprint, p. 16). N. incnnum, Bernh. in Im.scIi. & Mey. Ind. S.ni. llort. iVtri.p.' 

 18;J5, 38 (Ann. Sci. Nat. ser. 2, iv. 337). 6\ S„/,l,i,i, var. cunrscin's, Hook. Fl. Antarct. ii. 242. 

 N. cniiesrens, var. Iimc/iijairpum, Wats. Bihl. Inde.x. 09. S. cunt sans, \nr. alfHHt,,, T. \). 

 A. Cockerell, Bull. 'Porr. Clnh, xviii. 168 (.so far its the l.rief cliaracterizjitiou shows). S.],,,,. 

 7iatu7n, Greene, Bull. Calif. Acad. Sci. ii. .•$;»(), not Barn. ICn/.sinium i>inniil„,„, U'alt. Car. 

 174. Canhimincl mn/li/idd, I'ursh, Fl. ii. 440. C./ .l//-;/c,r.s//, J)C. Syst. ii. 267. Xasiur- 

 tium limit ijidiim & Meuziesii, Spreng. Syst. ii. 883. Dtscurniniu cniDsenis, rrautl in Kngl. & 

 Prantl, Nat. I'fian/euf. iii. Ab. 2, 192. D. pinnatn, Britton, Mem. Torr. CJul», v. I73._ 

 Common ami widely distributed, Florida to S. California, northward to hit. 66°'accordiiig 

 to Macoun. Tlie numerous forms distinguished by Torr. & Gray and others apjKiar coin- 

 ]detely confluent. (Mex.) 



S. Cumingianum, Fiscn. & Mey. Leaves thicki,sh, h-ss finely dL^-sected, don.^elv canes- 



ccut-tnmentose: pods longer, more .slender and acute, finely i)ubescent, 6 to 9 lines long, ou 



spreading pedicels of similar length. — Ind. Sem. Hort. "iVtrop. 1835,38; Fouruier. 1. c. 



63. — Not infre(iuent in canons, &c. of New Mexico, \Viii//,t, Cnciie, and Arizona. Palmer, 



Rothrock. (Adj. Chihuahua, Ilarlman; S. Am.) The typo from Chili has more tinel.- di.*^ 



seated leaves, but is connected with other forms of Uruguay, &c., closelv like our own. ' 



•I- -I- Capsules very slender, half to two thirds line in diameter; seeds uniseriate iu the 

 cells (or obscurely biseriate in short-podded forms of S. incisum). 

 S. S6phia, L. Slender branching annual with the habit of the preceding: leaves trij. innate 



with small linear or lance-linear segments: racemes elongated, especially the terminal one; 



pedicels filiform, half inch long, spreading : sili(}ues 9 to 1 1 lines long. — Spec. ii. 659 ; Torr! 



& Gray, Fl. i. 92; Hook. f. Arct. Fl. 286, 319; Wats. & Coulter in (irav. "SUix. ed. 6, 72. 



Descurainia Sojihin, Webb, ace. to Prantl, I.e. — In certain localities sparing] v introduced. 



acroiss the continent, more common in Canada. (Adv. from Eu) 



Var. SOphioides, Bkntii. & Hook. Leaves .somewhat le.<s finely divided : fruiting 



racemes very sliort and dense, umbelliform : pods an inch or more in length. (ien. i. 78; 



Trautv. Act. Hort. IVtrop. v. 25. ^'. So/ihui, Cham. & Schlecht. Linna-a, i. 28. not I.. 



S. SOphioides, Fisch. in Hook. FT. Bor.-Am. i. 61, t. 20; Torr. & (Jray, Fl. i. 92. — Brit. 



America from Lake Winnipeg, Buck; ace. to Macouu, to the Arctic Ocean. (Kaintsch.. 



Siberia.) 



S. incisum, Engelm. Delicate annual, subglabrous or more froipientlv finelv glnndiilar- 

 pul)erulent or stellate-tomentulose, scarcely canescent : leaves thin, pimiatifid to i)ipinnalitid ; 

 segments varying greatly in contour; racemes elongated ; pedicels 2 t<t 3 lines hmg. spn-ad- 

 ing, exceeded by the sharp-pointed spreading or curved-asceniling cap.<ules: the I.iiiit 

 glabrous or nearly .so. — Fngelm. in (iray, I'l. Fendl. 8 ; Torr. I'acif. 1{. LN-p. iv. 66 ; FonrniiT. 

 1. c. 64. ind. var. $, /ii/i/ro/ihliuin : Hrew. & Wats. Hot. Calif, i. 41. Drsmminia ii,r,s,i. Mrit- 

 ton. Mem. Torr. Club, v. 173. — The typical form extends from New Mexico to S California 

 and northward to N. Nevada and Winniiitg. The species is polymorphous a.s to foliagi*. 

 pubescence, and length of pods. The chief varieties are 



Var. Hartwegianum, Watson. Leaves pinnate; the leaflets narrowly oblong or 

 lanceolate, obtuse, and obtu.scly or acutely toothed : pods short, U to 3 lines in length, erwt. 

 borne upon a.scending (»r aj)pre.s.sfd pedicels of ecpial length, in a usually crowd<Mi raceme; 

 seeds sometimes irregularly biseriate. — Bot. Calif, i. 41. S. cttiifsrrns, Henth. I'l llartw. 

 9, not Nutt. ? .S". ctini'sctiis, var. hreri/irs, Torr. & (iray. Fl. i. 92. .S So/'hin. (Jr.iy. Froc. 

 Acad. Fhilad. 1863, 57. in part. ' S. I„;icl,,/r,iri,iim, ilook. & Am. Hot. Me.-ch.'32:« — . 

 Colorado to Moo.se .law, Northwest Territory, ace. to .Maconn, westward and .Houtliweftwartl. 

 iS. ('nliformrum, Wats. Hot. King Kxp. 23 (Smiloirshln ' Cali/ornicti, (Jir.\y, I'mh*. Am. Arad. 

 iv. 520), is merely ;i form with exce|itionally short capsule.H. 



