194 RANUNCULACEAE (BUTTERCUP FAMILY) 



or longer than the spur: lateral petals 2-cleft at the apex, slender-clawed, and 

 bearded within. Southern Colorado. 



10. Delphinium subalpinum (Gray) A. Nels. Bull. Torr. Bot. Club 27: 263. 

 1900. Tawny pubescent especially above and in the inflorescence, more or 

 less viscid; stems simple, erect, 5-15 dm. high: leaves deeply cleft into about 

 5 segments which are variously incised or gash-toothed, nearly glabrous: 

 raceme simple, short and compact (1 dm. long); pedicels longer than the 

 spurs of the uniformly very deep blue flowers: lower petals with narrow claw 

 and oval deeply notched blade; the lobes dentate: ovaries glabrate, bluish: 

 follicles short-oblong, glabrous. [(?) D. Barbeyi Huth. Bull. Herb. Boiss. 1 : 335. 

 1893.] In large dense beds at subalpine stations; Colorado and Wyoming. 



11. Delphinium reticulatum A. Nels. 1. c. 231. Near the preceding, more 



Eibescent but viscid in the inflorescence only; stems usually several from the 

 rge woody root, 5-10 dm. high, and more or less branched above: leaves 

 with 3-5 broadly cuneate divisions which are 3-clef t into more or less toothed 

 lobes: raceme simple or branched, becoming elongated; flowers dull or dark 

 blue, more or less streaked with white: spur longer than the sepals; lower 

 petals with ovate, bifid, more or less bearded blade: follicles erect, 10 mm. 

 long, conspicuously reticulated with dark lines, slightly pubescent or viscid- 

 pubescent. (D. multiflorum Rydb. Bull. Torr. Bot. Club 29: 147. 1902; D. 

 occidentale Wats, as to our range.) From northern Colorado to Montana 

 and Idaho. 



12. Delphinium Cockerellii A. Nels. Bot. Gaz. 42: 51. 1906. Tawny pubes- 

 cent on stems and in the inflorescence, densely and viscidly so above, the 

 leaves obscurely pubescent: stems nearly simple or bushy-branched, 6-12 dm. 

 high: leaves large, often 12-18 cm. in diameter, the veins strikingly superfi- 

 cial, about 5-cleft or parted into broadly oblong or oblong-cuneate divisions, 

 these merely coarsely toothed or incised above the middle: racemes often 

 several, open, with rather long peduncles and pedicels and few flowers (5-10) ; 

 flowers bright purple, large (3-4 cm. long): sepals oblong-lanceolate, acute, 

 about as long as the thick curved spur: petals small; the upper yellowish- 

 white, concealed within the upper sepal; the lower purple, with suborbicular 

 blade, cleft and sparsely hirsute-ciliate. Mountains of southern Colorado 

 and of New Mexico. 



13. Delphinium alpestre Rydb. Bull. Torr. Bot. Club 29: 146. 1902. Pu- 

 berulent, viscid above, caespitose, only 1-2 dm. high: leaves digitate, the 

 divisions cuneate-obovate, divided halfway into oblong mucronate lobes: 

 inflorescence short, few-flowered, viscid: sepals blue as are also the upper 

 petals: lower petals 2-cleft; the lobes lanceolate. Alpine, among rocks; 

 Colorado and New Mexico. 



14. Delphinium cucullatum A. Nels. Bull. Torr. Bot. Club 27: 262. 1900. 

 Stems numerous, clustered on thick woody roots, 8-15 dm. high, glabrous 

 nearly to the inflorescence, leafy: leaves finely pubescent, 10-18 cm. in diam- 

 eter, 3-7-divided, the segments cuneate and very irregularly cleft and gashed 

 at the apex: racemes usually several, very closely flowered, densely pubescent 

 (not viscid or glandular): sepals yellowish-white or bluish, all distinctly 

 hooded, shorter than the spur: petals blue, the lower pair with slender claw 

 having a conspicuous saccate nectary at base; the blade cleft to near the 

 middle: ovaries densely white-pubescent. Known as yet only from north- 

 western Wyoming, on Snake River. 



15. Delphinium glaucescens Rydb. Mem. N. Y. Bot. Gard. 1: 155. 1900. 

 Stems several or many from a thick caudex, pubescent, especially above, or 

 in age glabrate and glaucous, 3-8 dm. high: leaves finely puberulent, more 

 or less glaucous and tending to become glabrous, with 5-8 cuneate divisions 

 which are mostly 3-clef t: raceme simple, rather short; the lower bracts ex- 

 ceeding the flowers: flowers blue, or variegated with white, finely pilose: spur 

 as long as the lower petal: ovaries densely hairy: follicles erect, oblong, pu- 

 bescent. (D. ramosum Rydb. Bull. Torr. Bot. Club 28: 276. 1901; D. elon- 

 gatum Rydb. 1. c. 29: 148; D. qiiercetorum Greene, PI. Baker. 3: 4. 1901.) 

 Montana to Colorado. 



