58 



CRUCIFER^. [Hutchinsia. 



bus, foliis oblongis integris basi attenuatis pubescentibus. DC, — Schlecht in Herb, Willd, 

 -De Cand. Syst Veget v. 2. p, 355. Ejusd, Prodr, v, 1. p, 174. 



Hab. Rocky places in tJnalaschka. (Herb, Willd.)—Chdm\sso, M'ho did not find this plant in Una- 

 laschka, says of it, that it is very nearly allied to the preceding, differing only in the entire lanceolato-oblong 

 leaves and longer siliculce. 



* 



Trie. III. Thlaspide^ seu Pleurorhizeae Angustiseptae. Silicula dehiscens, septo angus- 

 tissimo, valvis carinatis navicularibus. Semina ovalia, interdum marginata. Cotyledones 

 plance^ accumbentes {o=), septo contraries, — Tribus distinctissima, cum Lepidineis solum 

 cojiferenda, sed distincta semiiiihus magis compressis et cotyledonibus accumbentibus. DC, 



15. THLASPL Linn. 



Silicula apice emarginata, valvis navicularibus dorso alatis, loculis 2-poly-spermis. 

 Petala sequalia. CaL basi aiqualis. — Flores albi, DC 



1. T, arveiise; foliis oblongis dentatis, caullbus erectis, siliculis obovato-orbiculatis 

 pedicello brevioribus. DC — Linn, Sp. PI, p, 901. Engl, Bot t, 1659. Pursh, Fl, Am, 

 V. 2. p, 435. De Cand. Prodr, v, 1. p, 175. 



Hab. Canada. Mrs. Shepherd; hut not general in the country, 



2. T, montanum; foliis subcarnosulis integris, radicalibus obovatis petiolatis, caulinis 

 oblongis sagittato-araplexicaulibus, petalis calyce majoribus, siliculis obcordatis 4-sperniis, 

 stylo filiformi. DC, — Linn, Sp, PL p, 902, De Cand, Prodr. v, 1. p, 176. — (T. preecox. 

 Wulf, et T. alpinum. Jacq.) 



Hab. Shores of the Arctic Sea, to the westward of the Mackenzie River ; CapU Sir John Franklin and 

 Capt. Back. One specimen was sent with T. alpestre, from Canada, hy Mrs. Percival. 



3. T, cochleariforme ; foliis subcarnosulis, radicalibus petiolatis ovatis subdentatis, 

 caulinis cordato-amplexicaulibus, petalis calyce majoribus, siliculis oblongis subemargin- 

 atis 8-spermis, stylo brevi filiformi. — De Cand, Si/st Veget, v, 2, p. 381, Prodr, v, 1. p, 176. 

 De Less, Ic, v. 2. t. 52. 



Hab. Common on the subalpine ridge of the Blue Mountains, and those of the Flat-head River, on the 

 south branches of the Columbia. Douglas. — Except in the larger size of this plant, and in the more 

 numerous seeds of the cells, it scarcely differs from the preceding. 



4. T, alpestre; foliis integris vel obscure dentatis, radicalibus ovatis petiolatis, caulinis 

 oblongis amplexicaulibus, petalis calyci subcequalibus, siliculis obcordatis 8-12-spermis5 

 stylo filiformi. DC,—Li7in. Sp. PL p. 903. EngL Bot t 81. De Cand, Prodr, v. I. p, 176. 



Hab. Canada. Mrs, Percival. 



16. HUTCHINSIA. Br. 



Silicula elliptica, valvis navicularibus apteris, loculis 2-spermis, rarius polyspermis. 

 CaL aequalis. Pet, aequalia, DC 



r 



H. calycina; cano-pubescens, foliis plerumque radicalibus profunde pinnatifidis longe 

 petiolatis, calycibus persistentibus, siliculis oblongis utrinque attenuatis stylo acuminatis, 

 (Tab. XVII. / 1^.)~-Desv. Journ. Bot. v, 3./?, 168. De Cand. Prodr. v. I. p. 178.— Lepi- 

 dium calycinum. Steph, in Willd. Sp, PL v. 3. p. 433. 



