52 



CRUCIFERiE. [Vraba. 



proxima." Br. — What I have taken for this plant in Captain Parry's collection, is smaller than /). alpina, 

 has fewer flowers upon the scape, and much smaller and narrower petals. 



6. Z). micropetdla ; scapis aphyllis pedicellisque pilosis, foliis lato-lanceolatis subvenosis 

 integerrimis pilis farcatis simplicibusque, petalis (albis) anguste-spathulatis calycem pilosi- 

 usculum vix superantibus, siliculis ellipticis, stigmate sessili emarginato. — Hook, in Parrj/s 

 2d Voy. App. p, 385. 



jS. minor. 



Hab. Island of Igloolik. Capt, Sir E, Parry, jS. Sea coast hetween the Coppermine and Mackenzie 

 Rivers. Dr. Richardson. — This has the habit of D. alpina, but its flowers more nearly resemble those 

 of D. pauciflora. They are, however, white, their petals smaller and still narrower than in the latter 

 species, collected into a dense corymb, or almost head of flowers, which scarcely changes its appearance even 

 when in Fruit. Dr. Richardson gathered only two specimens of this, one in flower, which differs only from 

 Capt. Parry's plant in its smaller size, and one in fruit. The siliculce are elliptical, purplish brown, glabrous, 

 veiny, crowned (as is the germen) with the sessile and deeply notched stigma. 



7. Z). muricella; scapo nudo velutino, foliis oblongis integris pube stellata caesio-velu- 

 tinis, siliculis oblongo-lanceolatis glabris. DC. — WahL Lapp, p. 178, L 11. yi 2. De Cand, 

 Prodr. V. I. p. 168. Brown in Ross's Voy, App, p, 193. Rich, in FranhL \st Journ. ed. 2. 

 App. p. 27. Hook, in Parry's 2d Voy. App. p. 387. — D. nivalis. Liljab. (not Willd.) 

 Pursh, Fl Am. v. 2. p. 433 ? 



Hab. Labrador. Colmastery (in Piirsh.) Arctic shores of America. Ross. Parry. Woody country 

 between lat. 54° and 64°. Dr. Richardson, — I scarcely sec how this may be discriminated from D. nivalis and 

 hirta. De CandoUe has placed it among the Chrysodrahce, or those species which have yellow flowers ; but 

 he expressly says the blossoms are white, though his var. /3. ctssia has yellow ones. 



8. Z). oblongata ; scapis nudis, pube floccosa subhirsutis, foliis csespitosis oblongo-line- 

 aribus integris ciliatis velutlnisque, siliculis elliptico-oblongis velutinis. DC. — Brown in 

 Ross's Voy. App. (without descr.) De Cand. Prodr. v. \. p. 169. — D. hirta, var. 2. Hook. 

 in Parry's 2d Voy. App. p. 386. 



Hab. Shores of Arctic America. Ross. Igloolik and Barrow River. Parry. — I have not seen this 

 species, nor is it known to Botanists except by De CandoUe's description. It seems very closely allied 

 to D. hirta. 



9. D. corymbosa ; scapis nudis hispidulis, foliis dense csespitosis oblongis basi attenuatis 

 ciliatis subhispidisque, siliculis ellipticis corymbosis hispidulis. DC, — Brown in Ross's 

 Voy. App, — De Cand, Prodr. v. \, p. 1 69. 



Hab. Shores of Arctic America. Capt. Ross. — This is mentioned by Mr. Brown as being extremely 

 similar to D. oblongata and tupestris ; and De CandoUe says of it, "Z>. oblon^atce et hirtce affinis." 



10. D. hirta ; scapis puberulis, folia pauca plerumque dentata gerentibus, foliis radi- 

 calibus oblongis subintegris puberulis, siliculis oblongis pedicellisque glaberriniis, stylo 

 subnullo. — Linn. Sp. PL p. 897. Wahl. Lapp, p. 175. t II. f. 3. Hook, in Parry's 2d 

 Voy, App. p, 385. (var. 1.) Rich, in Frankl \st Journ, ed. 2. p. 27. 



3. siliquosa, siliculis 9 lineas longis. Cham, et Schlecht, in LinnwUi v, 1. p, 23. 



s. 



foliis glabriusculis, scapo omnino glabro. 



