148 CRUCIFER^. Nasturtium. 



Carolina and westward to the Sierra Nevada and Oregon. (Mex., Greenland, ace. to 

 Lange; Eu., Asia.) 



Var. hispidum, Fisch. & Meyer.^ More or less hispid with short spreading hairs 

 or rarely glabrous : pods short, mostly broadly elliptical or subglobose, 1 or 2 or rarely 

 nearly 3 lines long. — Ind. Sem. Hort. Petrop. iii. 1837, 41. iV. hispidum, DC. Syst. ii. 201. 

 Brachylobus hispidus, Desv. Journ. Bot. iii. 183 (1814). Sisymbi-ium hispidum, Poir. Suppl. v. 

 161. — From New Brunswick to the Northwest Territory, Macoun, and Oregon, Hall, south 

 to Florida and New Mexico ; the more common form eastward. Tetrupoma barbarecefolium, 

 Turcz., & T. Krupsianum, Fisch. & Mey. lud. Sem Hort. Petrop. i. 1835, 39 {Camelina 

 barbarece/olium, DC. Syst. ii. 517, Deless. Ic. Sel. ii. t. 70; T. pyriforme, Seem. Bot. Herald, 

 24, t. 2), is a very closely allied form with globose or pyriform pods, which are often 

 abnormal in the number of carpels (2 to 6) and cells, as occasionally occurs also in var. 

 hispidum. It is a native of E. Siberia and is found at Norton's Sound, Alaska, where it 

 may have been introduced. 



Var. OCCidentale, Watson, n. var. Glabrous or the auricles of the leaves sometimes 

 ciliate : pods stout, 4 to 6 lines long, not rarely 4-carpellary. — Shumagin Islands, Alaska, 

 Dall, to Brit. Columbia, Lyall, Macoun, and the Lower Columbia Valley, Hall, Suksdorf, 

 Howell. 



+- -i- Pedicels short ( 1 or 2 lines long, rarely more) : seeds tuberculate. 



N. CUrvisiliqua, Nutt. Glabrous or slightly pubescent : stems branching, erect or decum- 

 bent : leaves oblauceolate, laciniately toothed or pinuatifid with broader and obtuser lobes : 

 pedicels short (rarely 3 lines long) : flowers very small : pods linear-oblong, terete, straight 

 or usually more or less curved, very obtuse or acutish, 2 to 8 lines long ; stigma sessile or 

 on a short stout style. — Nutt. in Torr. & Gray, Fl. i. 73. N. lyratum, Nutt. 1. c, the form 

 with more lyrate leaves. Nuttall's specimens referred by him to this species are in part, 

 and as described in Torr. & Gray, Fl., N. sinuatum ; one of the specimens in herb. Gray 

 represents the papillose form of that species.^ Sisymbriu7n curvisilic/ua, Hook. Fl. Bor.- Am. 

 i. 61. — From Brit. Columbia to Lower California, Orcutt, and eastward to N. Nevada and 

 Northwestern Wyoming ; frequent. 



Var. Nuttallii, Watson, n. var. Flowers rather larger (petals 1 to 1| lines long), 

 and the pods 4 to 8 lines long, on pedicels 2 to 4 lines in length. — N. polymorphum, Nutt. 

 1. c. 74. — In the Lower Columbia Valley, Nuttall, Suksdorf, Howell. 



N. obtusuna, Nutt. Usually low and depressed, glabrous or rarely subpubescent, branch- 

 ing : leaves lyrately pinnatifid (or the upper oblong to narrowly lanceolate and suberitire) ; 

 segments usually oblique and irregularly toothed : pedicels ascending, spreading or deflexed, 

 1 to 2 lines long, obtuse, straight or nearly so ; style very short and thick. — Nutt. in Torr. 

 & Graj', Fl. i. 74.^ — From. Keweenaw Co., Michigan, Farwell, Illinois, Missouri, and Texas, 

 west to Brit Columbia, Macoun, and S. California. 



Var. sphaerocarpum, Watson, n. var. Pods subglobose, about a line broad. — 

 N. sphcerocarpum. Gray, PI. Fendl. 6.* — Illinois to S. California. 



Var. (?) alpinum, Watson. Alpine: pedicels more elongated (2 to 4 lines long): 

 pods oblong or oblong-ovate (2 to 3 lines long), beaked with a short style. — Bot. King 

 Exp. 15. — In the Uinta and Wasatch Mountains, Utah, Watso?i, Jones, and on Fremont's 

 Peak in the Wind River Mountains, C. Richardson. 



-I— -I— H— Pedicels short (1 or 2 lines long or less) : seeds pitted. 

 N. tanacetifolium, Hook. & Arn, Low and depressed or sometimes ascending, a foot 

 high or less, branching from the base, usually somewhat scurfy-pubescent below : leaves 

 pinnately divided or lyrate ; segments very variable, more or less deeply and irregularly 

 toothed or often pinnatifid : pedicels spreading : pods cylindrical, straight or slightly curved, 

 4 to 7 lines long, acutish, ascending or widely spreading ; style short, a line long; seeds 



1 Prof. N. L. Britton, Bull. Torr. Club, xviii. 267, and Prof. J. Macoun regard this variety as a 

 distinct species. Add syn. Roripa hispida, Britton, Mem. Torr. Club, v. 169. 



2 Add syn. N, cernuum, Nutt. in Torr. & Gray, Fl. i, 74,Jide Wats. Bibl. Index, 66. N. occiden- 

 tale, Greene, Fl. Francis. 268. Roripa curvisiliqiia, Bessey,^c?e Britton, Mem. Torr. Club, v. 169. 



8 Add. syn. Roripa obtusa, Britton, 1. c. 



♦ Add sjni. Roripa sphcerocarpa, Britton, 1. c. 



