It; UK<>M>(iir.\I. SIKNKV iiF I'ANAKA. 



(28). R. aquatilis, I-im.. vu trichophyllus, Cli;iix. White 

 Walfi-ciow l.ioi. 



A'. '• •',•>•, Pnrsli. :»>.".. 



J{, . - var. (■.(/»('//(«■(».•!, I H". Hook. I'l. 1.. 10. 



A*. nijUiitUh vixr. l>ntfli!i])U.t, II.m.U. v^ .\rn. I'dir iV (iriiy, I'l. I., 058. 



Ci)ininon in sta,i;;nant jiools and slow-How in<;- brooks, li'Om Capo 

 Bi"oU)n (Ifoir.) lo Uritisli Colunibia. {Macoun.) Coppormino River. 

 (Simpson) GroonIan<l. (Ifook. AM. PI.) 



Var. stagnatilis, DC 



li. fiiiyirii'illuf, (irny, Manual, 4(t. 

 In stflicnanl pools from Rat Crock, Manitoba, westward to the inouD- 

 tains. (ilai'oun.) 



Var. Ccespitosus, DC. 



Borders of forest lakes. Small lakes, Noith Hastings, Out. 

 {Macoun.), thence northward and westwai-d. (IfooJcer.) 



The first is the common eastern form, and often grows in company 

 with the latter, while the second is the characteristic form of the stag- 

 nant pools of the prairies. 



(29.) R. multifidus, Pursh. Yellow Water-crowfoot. 



J{. riiri^hii, Torr. Hook. Fl. I., 16. 



Common in stagnant pools and ditches. Cape Breton Ishuid to the 

 Tacitic and northward to near the Arctic Sea. Kotzebue Sound. (Rothr. 

 Alask.) 



Var. /^. Watson's Index, 20. 



R. PursJiii var. } . Hook. Fl. I., 15. 



7?. Umosiw. Nutt. in Torr & Graj', Fl. I., 20. 



In or on the margins of small pools on the great prairies; in the 

 Touchwood Hills, N. W. T. {Macoun.) Lakes and marshes about 

 Cumberland House and Slave Lake. (Richardson.) Eocky Mountains. 

 (Drummond.) In pools near Stuart's Lake, B.C. (Macoun.) 



Var. ;. repenSy Watson in King's Eep., 8. 

 R. Pnrshii, var. ,1 Richardson. 



In a muddy brook near Flinton, Hastings Co., Out. Numerous 

 ])laces on the great prairies. (Macoun.) Swamps, foot-hills of Eocky 

 Mountains. (Dmrson.) Bear Lake. (Richardson.) 



(30.) R, alismaefolius, Geyer. Water-plantain. Spearwort. 

 Macoun's Cat., Xo. 23. 



lu inundated places on mud. Southern part of Ontario. (Goldie.) 



