Bras/a.] CRUCIFERiE. 



65 



which precisely accord with these from Carlton House and the Columhia. Dr. Torrey says that the plant 

 is very bitter, particularly the root, and is used as a medicine hy the Indians of the Platte. Of the present 

 plant I regret not to have perfect fruit. The seeds in the fully formed, but yet unripe pods, have the embryo 

 not conduplicate, but curved, and the curvature is directed towards the margins of the cotyledons, hence 

 the latter are acaimbent. Thus will this plant, together with many others, have to be removed from the 

 division of the order in which they are placed, on account of the supposed structure of the embryo. 

 Daily experience proves that primary divisions taken from this character, are neither convenient in practice 

 nor do they guide as to a natural arrangement. 



* 



21. CAMELINA. Crantz. 



Silicula obovata aut subglobosa, valvulis ventncosis cum styli parte dehiscentibus, locu- 

 lis polyspermis. Stylus filiformis. Semina oblonga, immarginata. DC, 



1. C. barharemfolia ; siliculis globosis, foliis oblongis pinnatifidis basi obtuse auriculatis, 

 caule basi villoso. — De Cand* Syst Veget v, 2. p, 517, Prodr. v, 1. p, 201. De Less, Ic, 

 Sel. V. 2, t 70. Cham, et ScMecJd, in LinncBa, v. \, p, 29. 



Hab. In the Bay of Eschscholtz. Chamisso. 



22. BRAYA. SternV. et Hoppe. 



Siligua brevis, teres, torulosa, stylo terminata, valvis subsemlcylindraceis. Stigma plaui- 

 usculum. Dissepimentum medi6 fissum. Semina quoque loculo subsex. Calyx basi 

 £equalis, sepalis erectis. — Perennes, radice crassa longe descendente. Folia pleraque radi- 

 caiia, angusta. Scapi breves nunc foUosi, Flores parvi, corymbosi, purpureo-albi. 



1. B, alpina; foliis glabris, scapo parce folioso, racemis fructiferis capitatis. 



«. europcea; stylo brevissimo. — B. alpina. Sternb. et Hoppe in Bot. Geselsch. Beg. v. I. 

 p, 66. t. L HooL Ex. Fl, v. 1. t 121. De Less, Ic. v. 2. t 22. 



fi. americana; stylo longiusculo gracili, 



Hab. /3. Alpine rivulets among the Rocky Mountains, between lat. 52° and 57°. — The few specimens of 

 this in Mr. Drummond's collection are in an excellent state of fructification, and they differ in no respect 

 from the Europsean plant in my possession from the Carinthian Alps, except in the greater length of the 

 style, which, indeed, is very striking. I have already noticed, in the Exotic Flora, that the genus had been 

 hitherto referred to the PleurorMzece ^ whereas, its cotyledons are decidedly incumbent. So short, too, is 

 the seed-vessel, that it has almost as great a claim to be ranged with the Siliculoste as the Siliquosce. In 

 habit, it accords with Parrya, Eutrema, and especially with the following genus, Platypetalum of Brown. 



2. B. glabella; foliis glabris, scapo plerumque folioso, racemis fructiferis laxis elongatis. 

 Bich. in Frankl. \st Journ, ed. 2. Jpp. p. 25. De Cand, Prodr. v. 1. p. 141. 



Hab. Arctic America; on the Copper Mountains; and principally on the shores of the sea between 

 the Mackenzie and Coppermine Rivers. Dr. TJic/iart^ow.— Excellent specimens of this, brought home by 

 Dr. Richardson from the Second Arctic Land Expedition, quite confirm the distinguishing characters given 

 hy that gentleman in his Botanical Append^'. He adds, in the margin of his own copy, from notes taken 

 on the spot, that the " scape is sometimes hairy, with bifurcated pubescence, and that the flowers arc white, 

 with a slight and partial tinge of purple." 



3. jB.? pilosa; foliis pilosis, scapo aphyllo, racemis demum elongatis. (Tab. XVII.} 



Radix perennis, fusiformis, lignosa, longe in terram descendens, et versus aplcem mmo«», •uperae ad 

 collum divisa, et plurimas rosulas foliorum sustinens. Folia omnia radicalia, patentia, densa, lineari-hinceo- 



VOL. I. ' 



