434 MINNESOTA BOTANICAL STUDIES. 



H. Petioles of root leaves much longer than blades. 



30. scaposum. 

 HH. Petioles of root leaves nearly equalling blades. 



31. uliginosum. 

 EE. Seeds decidedly winged. 



F. Upper petals white, never yellow 32. trolliifolium. 



FF. Upper petals often yellow or yellowish. 



G. Species from Old World introduced into gardens ; 



follicles always 3. 



H. Lower petals deep blue, 2-lobed, yellow-bearded. 



33. elatum. 



HH. Lower petals bright blue, entire, undulate 01 

 slightly 2-lobed. 



I. Flowers very large; spurs 9 to 10 lines long. 



34. grandiflorum, 



II. Flowers smaller; spurs 5 to 8 lines long. 



35. cheilanthum . 

 GG. Species from west of the Rockies ; follicles always 



3- 

 H. Plant glabrous, at least in lower part. 



I. Roots fascicled, not tuberous nor grumose. 



J. Follicles pubescent 36. scoptdorum. 



JJ. Follicles glabrous 37. glaucum. 



II. Root tuberous or grumose. 



J. Lower pedicels rather spreading, longer than 



the spurs. 

 K. Sepals equal to spur in length. 



38. glaucescens. 

 KK. Sepals shorter than the spur. 



39. Nuttallii. 

 JJ. Lower pedicels and others appressed, shorter 



than spurs 40. distichum. 



HH. Plant pubescent throughout 41. simplex. 



EEE. Seeds scaly; lower petal 2-lobed; Old World type. 

 F. Petioles hardly dilating at base, not sheathing ; lower 



petals yellow bearded 42. formosum. 



FF. Petioles sheathing at base ; beard on lower petals not 

 yellow. 



G. Flowers in loose panicles 43. Maackianum. 



GG. Flowers in dense racemes 44. hybridum. 



CC. Natives of Mexico, not introduced to American gardens. 

 D. Carpels puberulent to hairy at first. 



E. Plant glandular-hispid above 45. Madrense. 



EE. Plant not glandular-hispid in upper parts. 



