RANUNCULACEAE. 137 



North Boulder Peak; headwaters of Clear Creek; Rabbit-Ears, Larimer Co.; 

 Hahn's Peak. [STATE FLOWER OF COLORADO.] 



6. Aquilegia thalictrifolia Rydb. (A. chrysantha Coulter, in part.) In the 

 mountains of Colo, and western Tex. Alt. 6000-9000 ft. Alpine Tunnel; 

 Colorado Springs; Bear Creek Canon; Canon City; Grand Canon of the 

 Arkansas. 



7. Aquilegia chrysantha A. Gray. In the mountains of N. M. and Ariz. 

 It has also been reported from Colo., but no locality given. 



5. DELPHINIUM L. LARKSPUR. 



Pedicels erect or nearly so. 



Sepals white, only tinged with blue ; pods over i cm. long, about four times as 



long as broad ; seeds squamellate. 

 Spur almost three times as long as the upper petals, more or less curved ; 



seeds 3 mm. long, black, slightly squamellate. i. D. Penardii. 



Spur scarcely twice as long as the upper petals, almost straight; seeds 1.5-2 



mm. long, brown, strongly squamellate. 

 Lobes of the lateral petals divergent ; lower pedicels elongated ; spur mostly 



erect. 2. D. camportim. 



Lobes of the lateral petals not divergent ; lower pedicels not elongated ; spur 



mostly horizontal. 3. D. albescens. 



Sepals dark blue ; pod less than i cm. long, only 2-3 times as long as broad ; 

 seed not squamellate, but wing-margined ; stem and leaves glabrous and 

 glaucous. 12. D. elongatum. 



Pedicels ascending or spreading. 



Inflorescence few-flowered, the lower pedicels elongated ; sepals broad, spreading ; 



leaf-segments narrow. 

 Roots fascicled, thick, but not tuberiform; stem usually viscid, at least above; 



blades of the lateral petals about i cm. long. 4. D. bicolor. 



Roots tuberiform ; stem not viscid ; blades of the lateral petals about 5 mm. long. 



Flowers dark blue. 5. D. Nelsonii. 



Flowers light blue. 6. D. dumetorum. 



Lower pedicels not elongated. 



Segments of the basal leaves obtuse, mucronate ; flowers light blue. 



7. D. scapositni. 

 Segments of all the leaves acute or acuminate. 



Plant not at all viscid ; follicles pubescent. 

 Stem grayish strigose throughout. 



Leaves divided into cuneate, merely cleft segments. 



8. D. geranii folium. 

 Leaves repeatedly divided into linear division. 



Stem 3-5 dm. high ; bractlets oblong, close under the calyx. 



9. D. Geyeri. 

 Stem 5-20 dm. high ; bractlets subulate, 2-3 mm. below the calyx. 



ii. D. robnstiun. 

 Stem glabrous and glaucous at least below. 



Inflorescence dense ; follicles scarcely at all arcuate. 

 Leaves puberulent ; inflorescence stigose. 



Leaf-divisions broad, cuneate, -merely cleft into lanceolate lobes. 



10. D. cuculatum. 

 Leaves repeatedly dissected into linear lobes. 



11. D. robiistum. 

 Leaves glabrous and glaucous ; inflorescence almost glabrous. 



12. D. elongatum. 

 Inflorescence lax; follicles strongly arcuate. 13. D. ramosum. 



Plants more or less viscid, at least the pedicels. 



