Nasturtium. CRUCIFERiE. l47 



oblong ; the uppermost linear and entire : pedicels slender, ascending : pods " globose " or 

 elliptical and somewhat obcompressed, 2 lines long ; the cells 4-8-seeded ; style very short : 

 seeds smooth. — Fl. Scan. 65. Coc/ilearia Armoracia,!^. Spec. ii. 648. Armoracia rusticaita, 

 Gasrtn., Mey. & Scherb. Fl. Wett. ii. 426.^ — An anomalous species; cultivated for its large 

 pungent roots, which are used as a condiment. An escape in moist grounds, and rarely 

 perfecting fruit. (Introd. from Eu.) 



* * Petals yellow or yellowish, exceeding tlie calyx : stems from perennial underground 

 rootstocks : leaves pinnate or pinnatifid : pedicels usually 3 or 4 lines long or more : style 

 often slender. 



N, SYLVESTRE, R. Br. (Yellow Cress.) Stems slender and flexuous, erect or decumbent, 



1 or 2 feet high : leaves pinnate or deeply pinnatifid with linear to oblong entire or toothed 

 or laciniate segments : pods narrowly linear, 3 to 6 lines long, obtusish ; style usually short 

 or the broad stigma subsessile. — R. Br. in Ait. f. Kew. ed. 2, iv. 110. — In wet meadows, 

 Massachusetts to Virginia ; - rather rare. (Nat. from Eu.) 



N. sinuatum, Nutt. Stems decumbent or more usually procumbent or prostrate, branch- 

 ing, pale green, glabrous or slightly scurfy-pubescent : leaves more or less narrowly oblong 

 or oblanceolate, usually deeply and regularly pinnatifid ; the subequal oblong to deltoid 

 segments entire or with one or two teeth ; pedicels mostly divaricately spreading, slender, 



2 to 5 lines long : pods oblong to linear, mostly 3 to 5 lines long, acute at both ends and 

 beaked by a slender style, more or less curved. — Nutt. in Torr. & Gray, Fl. i. 73; Brew. 

 & Wats. Bot. Calif, i. 43. iV. trachycarpum, Gray, Bull. U. S. Geol. & Geog. Surv. ii. 233 ; 

 a frequent form with the axis of the raceme, the pedicels, and pods more or less papillose- 

 puberulent, the pods sometimes densely so. — From the plains of the Saskatchewan to 

 Minnesota and Arkansas, and westward to New Mexico, Arizona, Nevada, and E. Oregon.^ 



Var. calycinum, Watsox, n. var. An extreme form of the papillose-puberulent 

 condition with ovate pods (1 to 1| lines long). — N. calycinum, Engelm. in Warren, Prelim. 

 Report, 185.5-57, 156, & Trans. Am. Phil. Soc. n. ser. xii. 184. — Sandy bottom of the Yellow- 

 stone, Montana, Hai/den, 1854. 



Var. pubescens, Watsox, n. var. Very slender, pubescent throughout with a soft 

 woolly pubescence, the long lax racemes with long and very slender pedicels (3 to 6 lines in 

 length) : ovary oblong-obovate, pubescent ; style as long. — On Sauvie's Island, Oregon, 

 .7. Howell, 1884. 



Var.* Columbiae, Suksdorf (as spec). Low and spreading, pubescent throughout : 

 leaves rather narrow : pedicels even in fruit scarcely exceeding the capsules ; the latter 

 short-oblong (about a line and a half or two lines in length), densely pubescent with short 

 and rather fine scarcely papillose hairs. — Suksdorf, distr. 952. — Oregon, low gravelly 

 banks of the Columbia River near Bingen, Suksdorf, 1890, and earlier at Baker City, 

 Nevius, 1875. 



* * * Petals yellow or yellowish, rarely exceeding the short calyx : annuals or biennials, 

 with mostly lyrate leaves : style short and thick. 



H— Pedicels usually 3 or 4 lines long : seeds tuberculate. 



N.* terrestre, R. Br. Biennial, erect, branching, glabrous or rarely slightly pubescent: 

 lower leaves lyrate ; the upper more or less deeply pinnatifid or toothed ; the lobes narrowly 

 to broadly oblong, dentate : pods turgid, oblong, 2 to 4 lines long, usually very obtuse. — 

 R. Br. in Ait. f. Kew. ed. 2, iv. 110. N. palustre, DC* Syst. ii. 191 ; Gray, Gen. 111. i. 132, 

 t. 53, f. 1-5. ? N. amphibium, of authors as to Am. pi., not of R. Br. Sisymbrium palustre, 

 L. Spec. ii. 657; Pursh, Fl. ii. 440. ^ — Common in wet places from Arctic America to N. 



duced in spring and autunm, while those with broader blades are developed in midsummer. Prof. 

 Davis adds, 1. c. xx. 291, that the lower stem-leaves are invariably pinnately dissected. 



1 Add syn. Roripn Armoracia, Hitchcock, Spring Fl. Manhattan, 18. 



2 Maine, Mins Furbish; Newfoundland, Robinson k Schrenlc; also reported from N. Illinois by 

 E. J. Hill, Bot. Gaz. xvii. 246. Add syn. Roripa sylvestris, Bess. Enuin. 27. 



8 Klikitat Co., Washington, Suksdorf. Add syn. Roripa sinuata, Hitchcock, 1. c. 

 4 The name of this species has been altered to the earlier combination, in accordance with the 

 general system of nomenclature adopted in the work. 

 6 Add syn. Roripn palustris, Bess. 1. c. 



