464 MINNESOTA BOTANICAL STUDIES. 



K. Beaks of akenes not hooked. 



L. Petals about 5 (or 6), except perhaps 



in 13. 



M. Head of fruit longer than thick. 

 N. Sepals reflexed. 



8. Macounii; 9. Sardous. 

 NN. Sepals spreading ip. micranthus; 

 \\.fascicularis; 12. septentrionalis. 

 MM. Head of fruit globose. 



N. Stem leaves present ; roots fibrous. 



13. Hooker i; 14. pilosus ; 15. 



Bloomeri; 16. hispidus. 



NN. Stem leaves present, roots from 



a thickened bulb 17. bulbosus. 



NNN. Stem leaves wanting. 



1 8 . Icelandicus. 

 LL. Petals 7 to 16 (double in 21). 



19. orthorhynchus ; 20. dichotomus; 

 21. Llavcenus; 22. macranthus: 

 23. subalpinus, 

 KK. Beaks of akenes recurved or hooked. 



24. canus ; 25. amarillo; 26. repens. 

 II. Radical leaves with the leaflets all sessile. 



27. palmatus ; 28. Aschenbornianus ; 



29. acriformis; 30. Calif 'ornicus ; 



3 1 . Asiaticus. 



HH. Leaves, at least the radical ones, usually not 

 parted to the base, and in some species only 

 lobed or cleft. 

 I. Types found native or naturalized north of 



Mexico. 

 J. Sepals exceeding the petals, or sometimes a 



trifle shorter, recurved. 



K. Beaks of akenes minute, curved, or nearly 

 wanting 32. abortivus ; 33. sceleratus ; 



34. eremogenes. 



KK. Beaks of akenes nearly half the length of 

 the body, recurved... 35. Allegheniensis ; 

 36. recurvatus ; 37. Bongardi. 

 JJ. Sepals decidedly shorter than the petals. 

 K. Akenes compressed, or flat, with firm or 

 indurated margin. 



L. Sepals reflexed 38. occidentalis; 



39. Turner i. 



