146 CRUCIFEIM:. Coddearia. 



t. 696; Hook. 1. c; Torr. & Gray, Fl. i. 110. — Shores of the Arctic Ocean, Parry, Franklin, 

 Back, accordiug to Jlooker. American specimens with deltoid leaves and all petiolate as in 

 tlie European specimens do not seem to be represented in the leading American herbaria. 



C. Groenlandica, L. Radical leaves ovate or sub-orbicular, rounded or shallowl)' and 

 t)r(>adly corchite at the base, usually quite entire ; cauline narrowly elliptic to rliombic, sub- 

 entire or with a sliort touth or two upon each side of tiie narrowed subsessile or slender- 

 petioled base : capsule globose to ovoid, not strongly reticulated. — iSpec. ii. 647 ; DC. Syst. 

 ii. 366; Eng. Bot. t. 2403; Lange, Med. Gran. iii. 34, & Jour. Bot. xxvii. 39. — E. Arctic 

 America, Urinncll Laud, Greelif Exjied. (Greenland.) A low mostly small-leaved species. 

 Var. oblongifolia, Laxge. Taller and more rol)ust, 6 to 8 inclies high : cauline 

 leaves sessile, oblong ; the upper ones auriculate at tlie base. — Lange, 1. c. 35. C. oblomji- 

 j'olia, DC. Syst. ii. 363. — Across Arctic America from Greenland to Alaska. 



C. f enestrata, R. Bk. Foliage much as in the preceding species : flowers small : capsule 

 more tlccidedly ellipsoidal, usually free from distinct reticulation ; seeds about 8 in each 

 cell.— K. Br. in Ross, Voy. 143, & Farry, 1st Voy. Suppl. to App. 266 ; DC. Syst. ii. 367 ; 

 Lange, 1. c. 36. Eitlrema Rossli, Spreug. Syst. ii. 880. —Across Arctic America from Alaska 

 to Ellesmere Land, WelherUl. (Greenland.) A species variously referred by authors to 

 C. Granlandica, C. Anylica, and C. officinalis. 



34. NASTtJRTIUM, L., R. Br. (The classical Latin name of some 

 cress, from nasus, nose, and tortus, distortion, from the effect of its pungency 

 upon the nostrils.) — A genus widely dispersed over the globe, of annual, 

 biennial or perennial herbs, growing in damp or wet localities or truly aquatic, 

 glabrous or somewhat puberulent or hispid with simple hairs. Leaves usually 

 lyrately or pinnately parted or toothed, auricled at base. — L. Syst. ed, 1 ; R. 

 Br. in Ait. f. Kew. ed. 2, iv. 109 ; DC. Syst. ii. 187, & Prodr. i. 137 ; Reichenb. 

 Ic. PI. Germ. ii. t. 50-54; Gray, Gen. 111. i. t. 53.^ Roripa, Bess, in Gren. &, 

 Godr. Fl. Fr. i. 125, in part. [By S. Watson.] 



* Petals white, exceeding the calyx : glabrous ])orennia]s. 

 -1— Pods linear ; stigma small, entire : a(iuatic with pinnate leaves. 

 N. OFFICINALE, R. Br. 1. c. 110. (Water Cress.) Stems spreading, rooting at the lower 

 nodes: leaflets 3 to 11 (or lateral leaflets none on the lowest leaves), from orbicular to 

 oblong lanceolate, more or less sinuate or rarely obtusely toothed : pedicels and pods divari- 

 cately spreading or somewhat reflexed : pods 6 to 10 lines long, acuminate, a little exceed- 

 ing the pedicels. — Sisymbrium Nasturtium, L. Spec. ii. 657.'^ — In running water and on wet 

 banks of brooks and ditches; widely distributed. (Nat. from Eu., Asia.) 

 ^_ ^_ Pods .short ; stigma broader than the .«tyle,lobed : leaves undivided or pinnatifid, or 

 the submer.«ed capillary-dissected. 

 N. laCUStre Gray. Aquatic : stems elongated, branching above : submersed leaves petio- 

 late and entire or pinnatifid, or mostly sessile and dissected into numerous capillary seg- 

 ments ; emersed leaves oblong, sessile, entire or denticulate or sometimes pinnatifid : pods 

 oblong to ol)long-obovate, obtuse, 2 or 3 lines long, shorter than the divaricate pedicels ; 

 slender style half as long or more ; septum nearly wanting. — Gen. 111. i. 132. N. nalans. 

 Hook. Fl. Bor.-Am. i. 39, not DC. N. natnns, var. Americana, Gray, Ann. Lye. N. Y. iii. 

 323. Cocklearia aqnatica, A. Eaton, Man. ed. b, 181. Armoracia Americana, Hook. & Am. 

 Brit. Fl. ed. 7, 29.» — N. Vermont and Montreal to S. Ontario and S. E. Minnesota, south- 

 ward to Florida and Louisiana. Tlie submersed leaves are deciduous and often take root in 

 the mud and start new plants. 

 N. (?) ArmorAcia, Fries. (Horse-radish.) Terrestrial, tall and stout : leaves crenate, rarely 

 ])iniiatifid ; * the radical very large, narrowly oblong-lanceolate to oblong-cordate or ovate- 



1 Add syn. Rorippa, Scoil Fl. Cam. 520. Roripa of authors. 



2 Add syn. Roripa Nasturtium, Scop. ace. to Rusby, Mem. Torr. Clul), iii. no. 3, T>. 



3 Add syn. Roripa Americana, Britton, Mem. Torr. Club, v. 169. 



4 Prof. Q. A. Davis, Bull. Torr. Club, xvii. 318, notes that-the pinnatilid leaves are regularly i-ro- 



