40 CRUCIFERiE. nasturtium. 



RORIPA. 



S.c.ls small, rounded, somewhat flattened, impressed punctate. 



X. officinale R. Br. 1. c. Glabrous; stems stoutish hollow rooting at 

 the decumbent base, the branches %-b feet long: roots all fibrous: leaves 

 pinnate, leaflets rounded or elongated the terminal one largest: petals 

 white, exceeding the calyx : pods divaricately spreading, 6-10 lines long, 

 acute at each end, equaling the spreading pedicels, style short and thick. 

 Common in brooks and wet places. Introduced from Europe. 



4 RORIPA Scop. Fl. Carn. 520. 



Annual, biennial, or perennial herbs with yellow flowers in pan- 

 iculate racemes. Commonly referred to Nasturtium. Sepals 

 greenish yellow, ascending or spreading. Petals short-unguicu- 

 latc and ascending. Pods terete or nearly so ; valves thin, nearly 

 or quite nerveless. Seeds small, turgid and wingless, in 2 rows in 

 each cell, minutely tuberculate. 



R. sinuata A. S. Hitchck. Spring Fl. Manh. 18. Nasturtium sinuatum, 

 Xntt. Stems decumbent to prostrate pale green glabrous or slightly scurfy- 

 pubescent: leaves narrowly oblong or pblanceolate, usually deep and regu- 

 larly pinnatifid, the subequal oblong to deltoid segments entire or with 1 

 or 2 teeth : pedicels mostly divaricately spreading, slender, 2-5 lines long: 

 pods oblong to linear, mostly 3-5 lines long acute at each end and beaked 

 by a slender style, more or less curved. Eastern Oregon and Washington 

 to the plains of the Saskatchewan. Minnesota and Arkansas. 



Var. pubescens. Nasturtium sinuatum var. pubescens Watson in Gray 

 Syn. Fl. i. 174- Pubescent throughout with woolly hairs: stems very slen- 

 der, decumbent: racemes lax, 4-5 inches long: pedicels 3-6 lines long, very 

 slender: ovary oblong-obovate, pubescent: style long and slender. On 

 sandy ground Sauvie's Island Oregon, at the mouth of the Willamette 

 river. But one plant was found : if not abnormal it is a good species. 



R. Columbia. Nasturtium Columbia Suksdorf in Herb, distr. 952. Low 

 and spreading, pubescent throughout: leaves rather narrow, deeply and 

 narrowly pinnatifid: pedicels scarcely 2 lines long: pods short-oblong. 1 h, 

 -2 liaes long, densely pubescent with short and rather fine somewhat papi- 

 lose hairs. Low gravelly banks of the Columbia and Snake rivers, which 

 are submerged most of the year. 



K. palustris Bess. Enum. 27. Nasturtium palustre DC. Glabrous or 

 rarely somewhat pubescent: stems erect from a biennial root, 6-18 inches 

 high, branching: lower leaves lyrate ; upper more or less deeply pinnatifid 

 or merely toothed, the lobes narrowly to broadly oblong, dentate; pods ob- 

 long, turgid, usually obtuse. Oregon to the Sierra Nevadas and the At- 

 lantic states. 



R. Paclflca. Nasturtium terrestre var* occidentale Watson, in Gray Syn. 



Fl. /, \.' t s. Glabrous or the auricles of the leaves sometimes ciliate: stems 

 stout, I-:! feet high from a stout annual or biennial root : more or less 

 freely branching : leaves lanceolate, the lower ones lyrate, petioled, 2-6 

 inches long ; the oblong to ovate segments erose-dentate : pods oblong, tur- 

 gid acutisb at both ends or obtuse above, 4-6 lines long, equaling the 

 -pleading pedicels. On alluvial soil lower Columbia valley to Brit. Colum- 

 bia. 



U. sphvrocarpa Britton, Mem. Torr. club, v. 170. Nasturtium sphse- 

 rocarpum, Ghray PI. Fendl.6. More or less hispid with short spreading 

 hairs: stems erect. L-3feethieh from a biennial or winter annual root: 

 branched above : lower leaves lyrate with oblong or ovate, dentate Beg- 



tnentS, 'Upper Ones lanceolate, more or less pinnatifid or irregularly den- 

 tate: poils short, mostly broadly elliptical or subglobose 1-3 lines* long. 

 Oregon and Washington . 



