RANUNCULACEAE (BUTTERCUP FAMILY) 191 



Spur longer than the calyx. 



Flowers red in whole or in part . . . . . . . 1. A. elegantula. 



Flowers never red. 



Flowers blue or white . . . . . . . . . 2. A. coerulea. 



Flowers yellow or bluish. 



Spurs long (5-7 cm.), yellow 3. A. chrysantha. 



Spurs shorter (4 cm. or less), bluish . . . . . 4. A. oreophila. 

 Spur shorter than the calyx. 



Stem leafy or not wholly naked-scapose; flowers several. 

 Flowers yellow or yellowish. 

 Plant tall (more than 2 dm.). 



Spur as long as lamina . . . . . . . . 5. A. flavescens. 



Spur nearly wanting 6. A. Eastwoodiae. 



Plant lower (less than 2 dm. high) . . . . . . 7. A. laramiensis. 



Flowers blue . . . . . . . . . . 8. A. saximontana. 



Stem scapose, 1-flowered 9. A. Jonesii. 



1. Aquilegia elegantula Greene, Pitt. 4: 14. 1899. Erect, glabrous, slen- 

 der, 2-4 dm. high: leaves mostly radical, long-petioled, glaucous beneath; 

 cauline small, subsessile: flowers solitary or few, about 3 cm. long: sepals and 

 limb of petals yellowish-green, or becoming red like the spurs: spurs inflated 

 above, straight, longer than the sepals: filaments short: styles exserted. A. 

 canadensis. Colorado and New Mexico. 



2. Aquilegia coerulea James, in Long's Exp. 2: 15. 1825. Glabrous, rather 

 slender, 3-6 dm. high: leaves most radical and long-petioled, glaucous beneath; 

 the leaflets deeply cleft: flowers solitary or several, terminating the peduncle- 

 like stems, large, deep blue, or rarely pale: sepals rhomboid-ovate, acute, 

 longer than the obtuse petals: spurs straight, slender, twice as long as the 

 limb: style shorter than the petals. Frequent in the mountains; northern New 

 Mexico to Montana; the state flower of Colorado. 



2a. Aquilegia coerulea leptocera (Nutt.) A. Nels. Not readily distinguished 

 from the species except by the nearly white flowers and the broader and very 

 obtuse lobes of the leaflets. A. leptocera Nutt. Journ. Acad. Phil. 7: 9. 1834. 

 Western Wyoming and Utah, at lower elevations than the species. 



3. Aquilegia chrysantha Gray, Proc. Am. Acad. 8: 621. 1873. Resembling 

 the preceding in habit, but often taller (3-10 dm. high) : flowers many, a pure 

 yellow: sepals lanceolate-oblong, scarcely longer and not broader than the 

 lamina of the petals: spurs long, straight and slender. (A. thalictrifolia Rydb. 

 Bull. Torr. Bot. Club 29: 145. 1902.) Southern Colorado, New Mexico, and 

 Arizona. 



4. Aquilegia oreophila Rydb. Bull. Torr. Bot. Club 29: 146. 1902. Re- 

 sembling the two preceding and the following, smaller, 2-4 dm. high: flowers 

 few, 3-4 cm. long: sepals oblong-lanceolate, acute, pale blue, longer than the 

 oval obtuse ochroleucous limb of the petals: spurs straight, widening regularly 

 to the throat, ochroleucous or bluish, about twice as long as limb. Middle 

 elevations; northwestern Wyoming to Idaho and Montana. 



5. Aquilegia flavescens Wats. Bot. King's Exp. 10. 1871. Glabrous except 

 above, branching freely, 3-5 dm. high: flowers lemon-yellow, sometimes 

 tinged with scarlet: sepals oval or oblong, spreading or reflexed, longer than 

 the obovate obtuse limb of the petals : spur about equaling the petals, more or 

 less curved but scarcely hooked, knobbed, 6-8 mm. long: stamens longer than 

 the petals. Probably in the western part of our range in the higher mountains. 



6. Aquilegia Eastwoodiae Rydb. Bull. Torr, Bot. Club 29: 146. 1902. 

 Pubescent with soft spreading hairs: leaves triternate on long slender petioles; 

 leaflets cuneate, thin, somewhat 3-lobed, petioled: sepals and petals lanceo- 

 late, subequal, 15 mm. long: the petals merely saccate at base and not truly 

 spurred: sterile filaments united into a tube: follicles reticulate-veiny, 12- 

 15 mm. long. (A. ecalcarata Eastwood, Zoe 2: 226.) Southwestern Colorado 

 to Utah and southward. 



7. Aquilegia laramiensis A. Nels. First Rep. Fl. Wyo. 78. 1896. Many- 

 stemmed from a rather large semifleshy root, 1-2 dm. high; stems and petioles 

 more or less decumbent and diffuse: leaves biternate; the leaflets large, with 

 crenate lobes, slightly pubescent below: inflorescence and fruits pubescent: 

 flowers 10-15 mm. long: sepals greenish- white, lanceolate, with emarginate 



