174 



ROSACE.E. [Geum. 



1. G, trifoliata; stipulis linearibus acuminatis integris. " McBnch^ Stfppl. p. 286." Di 

 Cand, Prodr, v, 2. p. 346. Torrty^ Fl. of Un. St v. I. p, 463. — Spiraea trifoliata. Lin?i 

 Sp. PL p. T02. Mich. Am, t\ 1. p. 343. Elliott, Carol v.l.p. 362. 



Hab. Canada. Pursh. 



Trie. III. Dryade^. Vent 



6. DRYAS. Linn, 



Cat 8-9-partitus extus nudus, tubo subcoiicavo. Pet 8-9. Stam, 00. Carpella 00, 

 stylo terminal! demum in caudam barbato-plumosam desinente. Semen adscendens, — 



Herbae humillimm, foliis indivisis suhtus albo-tomentosis, floribus alhis {rarius luteis.) DC, 



1. Z). octopetala; foliis oblongo-ovatis profunde crenato-serratis basi obtusis subtus albo- 

 tonieiitosis venis nudiusculis prominentibus, calycis segmentis linearibus, (floribus albis.) — 



Linn, Sp, PL p. 717. EngL Bot t 31. Pursh^ Fl, Am, v, \, p, 350. De Cand, Prodr, v, 2, 

 p, 350. Torrey in PL of Pock. Mount p. 195. 



Hab. High mountains in the North-West parts of Canada. Pursh. Rocky Mountains, between lat. 

 52°-56°, sometimes with double flowers. Drumviond. Cape Lisbume, in Behring*s Straits. Lay and Collie 

 in Captain Beecliey's Collection. It is found, according* to Dr. Torrey, as far south upon the Rocky Moun- 

 tains as lat. 30°. Shores and Islands of the Arctic Sea, {Captain Sir J. Franklin and Captain SirE. Parry ^ 

 hut much less fi*equent than D. integrifolia, from which it may always and readily be distingiushed, 



2. D. integrifolia; foliis oblongo-ovatis basi latioribus cordatis integerriniis seu inferne 

 solummodo paucidentatis subtus albo-tomentosis vix venosis, calycis segmentis linearibus, 

 (floribus albis.) — Vahl, in Act Soc. Hafn. v. 4. P. 2. p, 177. Fl, Dan, t 1216. Pick, in 

 FrankL \st Jonrn, ed, 2. App, jo. 21. Hook, Ex, FL t 220. De Cand, Prodr, i\ 2. p, 549. 

 Torrey^ FL of Un, St v, I, p, 492. — D. tenella. Pursh, FL Am. v. I, p, 350. 



Hab. Island of Anticosti, in the Gulph of St. Lawrence. Mr. Goldie, Labrador. Mev. Mr. Colmaster. 

 In dry rocky places from lat. 54° to the shores and islands of the Arctic Sea, where it is abundant. Franklin^ 

 Richai^dsoUy Parry^ Sabine, S^x, Extending- westward to Behring's Straits. ChamissOj Lay and Collie in 

 Captain Seechey^s Collection. Rocky Mountains, between lat. 52° and 5Q°f especially on the more elevated 

 ridg-es, Drummond. — Leaves much smoother (less impressed with veins), and the whole plant far less glan- 

 dular than the preceding species. It retains its character for years in cultivation. 



3. D, Drummondii; foliis ellipticis basi subattenuatis crenato-serratis subtus venisque 

 prominentibus niveo-tomeatosis, calycis segmentis ovatis, (floribus luteis.) — Rich, MSS. — 

 Hook, in Bot Mag. t 2972. — Dryas octopetala. Mich, in FrankL 1st Journ, ed, 2. App. p. 21, 



Hab. In the woody country between lat. 54° and 64°, and about Slave Lake and Bear Lake, as far as 

 the mouth of the River Bear Lake on the shores of the Arctic Sea in lat. 68°. Dr. Richardson. Gravelly 

 battures of alpine rivers, among the Rocky Mountains. Drummond. — This highly beautiful and little knoivn 

 plant is distinguished from the other species of Dryas no less by the colour of its flowers than by the form 

 of its calycine segments. 



7, GEUM. Linn. 



Cat tubus concavus, limbo 5-fido5 extus 5-bracteolatus. Pet. 5. Stam, 00. Carpella 

 exsucca caudata in capitulum disposita, stylo post antbesin geniculato, articulo superiore 

 saepe deciduo. Semen adscendens. — Herbae, foliis varie pinnatisectis. 



