464 MINNESOTA BOTANICAL STUDIES. 
K. Beaks of akenes not hooked. 
L. Petals about 5 (or 6), except perhaps 
inir. 
M. Head of fruit longer than thick. 
N. Sepals reflexed. 
8. Macouniz; 9. Sardous. 
NN. Sepals spreading 10. mdcranthus ; 
11. fasctcularis ; 12. septentrionalis. 
MM. Head of fruit globose. 
N. Stem leaves present; roots fibrous. 
13. Hlookert; 14. ptlosus; 15. 
Bloomeri; 16. hispidus. 
NN. Stem leaves present, roots from 
a thickened bulb...... 17. bulbosus. 
NNN. Stem leaves wanting. 
18. Lcelandicus. 
LL. Petals 7 to 16 (double in 21). 
19. orthorhynchus; 20. dichotomus ; 
21. Llavenus; 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. Californicus ; 
31. Aszaticus. 
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. Adleghentensis ; 
36. recurvatus; 37. Bongardz. 
JJ. Sepals decidedly shorter than the petals. 
K. Akenes compressed, or flat, with firm or 
indurated margin. 
I. sepals MeMeRed 1s nacpeds 38. occtdentalts ; 
39. Turneri. 
