42 



CRUCIFER^. [Arabis. 



Mag 



glabriusculo longioribus, 



V, 2. p. 427. De Cand. Prodr. v. 1. p. 142. 



Hab. In Labrador. Colmaster, Mr, Morrison, — This plant, so abundant on tbe southern Europaean Alps, 

 I believe grows no where else in America than in the above-mentioned habitat. I have specimens from 

 Greenland, given me by Professor Homemann. 



2. A, hirsvta ; erecta, foliis dentatis (fere omnibus) pube ramosa hirsutis, radicalibus 

 ovato-oblongis petiolatis, caulinis ovalibus lanceolate -sagittatisve, siliquis numerosis erectis 

 strictis. — Scop, Cam. ed, 2. n. 835. De Cand. Prodr, v. 1. p. 144. Cham, et Schlecht in 

 LinruBa^ v, 1. p, 15. — Turritis hirsuta. Linn, Sp. Pi, p. 930. Engl, Bot, t 587. — T. ovata. 

 Pursh, Fl, Am. v. 2. p. 438. — T. sagittata. Rick, in Frankl. \st Journ, ed, 2. App, p, 26. 

 De Cand, Prodr. v, 1. p, 143. ? especially van y. ovata. 



Hab. Island of Unalaschka. Chamisso. From Hudson's Bay to the Rocky Mountains, and at the Colum- 

 bia River, on the North -West coast; and from Canada to lat, 68°. Dr. Richardson. Drummond. Douglas. 

 Scouler. — This plant varies much in its stem-leaves, which are more or less oval and oblong, elliptical or 

 lanceolate, or sagittate, pubescent or quite glabrous. It is remarkable for its numerous, erect, shining, very, 

 stnut pods. I do not see how A. sagittata is to be distinguished from it. My Europsean specimens, under 

 that name, quite agree with the British, and with my American A, hirsuta. 



3. A. stricta; foliis radicalibus oblongis basi attenuatis sublyrato-pinnatifidis pilis 

 ramosis hispidis, caulinis paucis lanceolatis basi subattenuatis, petalis oblongis erectis 

 obtusis calyce glabro duplo longioribus, siliquis elongatis erectis. — Huds, Angl. p, 292. 

 Engl. Bot. t, 614, Pursh, Fl. Am. v. 2. p, 437. De Cand, Prodr, v. 1. p. 144. 



Hab. Labrador. Colmaster ; in Herb. Dicks. (^Pursh.^ — I have never seen American specimens of this. 



4. A. petrcBa; caulibus erectiusculis vel diffusis glabris, foliis radicalibus sublonge 

 petiolatis integris dentatis vel lyrato-pinnatifidis, caulinis lanceolatis subpetiolatis integris 

 dentatisve, petalis obovatis unguiculatis, siliquis erecto-patentibus. — Lam. Diet v, 1. p. 221. 

 De Cand. Prodr. v. 1. p, 145. Cham, et Schlecht, in Linncea^ v. 1. p, 15. — Arabis lyrata. 

 Linn, Sp. PI. p, &29. Pursh, Fl. Am. v. 2. p, 437. De Cand. Prodr, v. 1. p. 146. Eich, in 



+ 



Frankl, 1st Journ, ed, 2. App, p. 26. — Cardamine hastulata. Engl, Bot. t. 469. — C- petraea. 

 Lightf, Scot. p. 347. t, 15. Linn. Sp, PL p, 913. 



Hab. Throughout Canada, extending westward to the Rocky Mountains, between lat. 55° and 56°, and 

 to the islands of the Polar Sea. Goldie. Dr. Richardson. Drummond, Parry, ^c. Unalaschka. Chamisso. 

 — Authentic specimens of Arabis lyrata^ from Dr. Schweinitz and Professor Torrey, and from Dr. Richard- 

 son, I have compared with our Europaean A.petrmay and find them to be in all respects the same. The plant 

 is doubtless liable to much variation, being sometimes, indeed generally, quite glabrous ; at other times the 

 root-leaves and base of the stem are hispid ^vith branching hairs. The pods are mostly nearly erect, but some- 

 times almost patent; generally scarcely an inch long, at other times full two inches long; mostly with an 

 inconspicuous style, at other times with a very apparent one. Flowers white or lilac. It comes exceedingly 

 near to some states of A. arenosa ; and I fear cannot specifically be distinguished from it. 



5. A,amhigua; foliis subglabris, radicalibus sinuato-lyratis, mediis oblongo-ovalibus 

 dentatis, summis oblongo-linearibus integris, caule subsimplici, siliquis erectiusculis. — De 

 Cand, Prodr, v, \. p. 146. 



^. foliis glabris, caule basi hispido. DC— Cham. et. Scldecht. in Linncea, v. \. p. 16. 



