192 RANUNCULACEAE (BUTTERCUP FAMILY) 



apex: lamina of the petals cream-color, elliptical, obtuse, longer than the 

 slender hooked knobbed spurs. Shaded cliffs in the Laramie range, Wyom- 

 ing. 



8. Aquilegia saximontana Rydb. in Robins. Syn. Fl. 1: 43. 1895. Glabrous, 

 12-18 cm. high: stems several from a scaly rootstock: leaves small, twice 

 ternate, even the upper slender-petioled : flowers small, 12-18 mm. long; the 

 lamina of the petals yellowish, shorter than the blue sepals and much longer 

 than the blue spurs: carpels glabrous. A. brevistyla. High peaks in the cen- 

 tral Rocky Mountains. 



9. Aquilegia Jonesii Parry, Am. Nat. 8: 211. 1874. Minutely soft- 

 pubescent: scape 3-6 cm. high, naked, 1 -flowered: leaves all crowded and the 

 persistent scale-like dilated bases of their petioles imbricated on the stout 

 ascending branches of the rootstock; the partial petioles short or wanting, so 

 that the 9 small obovate entire leaflets are in a dense cluster: lamina of petals 

 only half as long as the obtuse sepals; the spurs shorter than the sepals: folli- 

 cles large, 2 cm. long. Rare alpine plants; high peaks in the central Rocky 

 Mountains. 



5. DELPHINIUM L. LARKSPUR 



Erect herbs, usually with palmately lobed, cleft, or dissected leaves, and 

 racemose flowers which are white, blue, or purple. Sepals 5, petal-like. Petals 

 2 or 4, irregular; when 4, the upper pair are developed backwards into a spur 

 which is inclosed in the spur of the upper sepal; the lower pair with slender 

 claw and broad blade. Pistils few, becoming erect or divergent follicles with 

 several to many seeds. 



Roots fasciculate-tuberous and easily detachable from the slender 



stem. 



Stem strict, 3-4 dm. high; flowers many, in a spicate-raceme . 1. D. strictum. 

 Stem lower; flowers few, in a lax raceme . . . . 2. D. Nelsonii. 



Roots thickened and fascicled but not tuberous; plants low (15 dm. 



high). 

 Stems glabrous, at least below. 



Leaves basal and cauline . . . . . . . 3. D. bicolor. 



Leaves all basal . . . . . . . 4. D. scapusum. 



Stems pubescent to the base. 



Radical leaves numerous, tufted . . . . 5. D. Geyeri. 



Radical leaves few, open 6. D. carolinianum. 



Roots large, deep-set, woody, with 1 or more crowns; plants often 



coarse and tall (1-20 dm. high). 

 Leaf -segments laciniately multind; the lobes linear. 



Flowers green or greenish and purple-streaked . . . . 7. D. sapellonis. 

 Flowers blue. 



Stem glabrous below 8. D. scopulorum. 



Stem puberulent to the base . . . . . . 9. D. robustum. 



Leaf-segments 5-9, these and their divisions oblong to obovate- 



cuneate. 



Pubescence more or less viscid-villous, yellowish. 

 Raceme crowded, spicate; flowers blue. 



Mature follicles glabrous ....... 10. D. subalpinum. 



Mature follicles viscid-pubescent . . . . . 11. D. reticulatum. 



Raceme open; flowers few (5-10). 



Plant tall; flowers purple 12. D. Cockerellii. 



Plant low; flowers blue ....... 13. D. alpestre. 



Pubescence finely canescent, not viscid or glandular. 



Raceme dense, spicate, finely villous 14. D. cucullatum. 



Raceme more open, pilose ....... 15. D. glaucescens. 



1. Delphinium strictum A. Nels. Bull. Torr. Bot. Club 27: 263. 1900. 

 Finely pubescent: root tuberous-fasciculate or solitary-cormose : stem very 

 strict, 3-4 dm. high: leaves trifoliolate; the leaflets again 3-parted or variously 

 lobed; the segments oblong to linear: raceme spicate, 5-10 cm. long; pedicels 

 short, erect, stout: flowers blue: spur straight, with deflexed tip, standing at 

 right angles to the rachis; lateral petals deeply cleft, sparsely long- villous: 

 follicles 3, pubescent, 6-8 mm. long: seeds wing-angled. Wet meadows; 

 Jackson's Hole, Wyoming. 



2. Delphinium Nelsonii Greene, Pitt. 3: 92. 1896. Finely puberulent, at 



