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. trollizfolium. 
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 or 
slightly 2-lobed. 
I. Flowers very large; spurs 9 to 10 lines long. 
34. grandifiorum. 
II. Flowers smaller; spurs 5 to § lines long. 
35. chetlanthum. 
GG. Species from west of the Rockies; follicles always 
2. 
H. Plant glabrous, at least in lower part. 
I. Roots fascicled, not tuberous nor grumose. 
yes Pollicies pubescent. 5, 25... 36. scopulorum. 
J) Bollicles (elabrous 205.2602 5.c. 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. Nuttalliz. 
JJ. Lower pedicels and others appressed, shorter 
Ehat IS PUES. AL eae cceas sat Rae 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 yellowsbearded ys Te canteens. meane 42. formosum. 
FF. Petioles sheathing at base; beard on lower petals not 
yellow. 
G. Flowers:in loose panicles........... 43. Jaackianum. 
GG. ‘Flowerts: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. 
