308 RANUNCULACEAE 



less, 3-lobed; stem-leaves few, small, ternate; sepals ovate-oblong, pale blue or 

 pale purple; lamina of the petals white, oblong, rounded; spurs slender, 3-5 cm. 

 long; follicles pubescent. Mountains: Utah. Mont. Subalp. My-Jl. 



16. A. pallens Payson. Stem slender, erect; lower leaves biternate; leaf- 

 lets cuneate to suborbicular, inclined to be reyolute-margined, glaucous, viscid 

 and pubescent beneath; sepals 1.5 cm. long, white or pale blue, lanceolate; petals 

 white; lamina truncate, 8 mm. long, 6 mm. broad; spur slender, straight, 3 cm. 

 long; follicles pubescent. A. coerulea calcarea M. E. Jones. Moist sandstone 

 cliffs: s Utah w Colo. Son. Je. 



17. A. oreophila Rydb. Very similar to A. coerulea, but with usually 

 smaller yellow flowers; leaves usually coarser; leaflets 2.5-3 cm. long; lamina 

 about 1.5 cm. long; spur 2.5-3 cm.; follicles 2.5 cm. A. coerulea alpina A. Nels. 

 A. coerulea flavescens Jones. On naked summits: Wyo. Utah. Subalp. Alp. 

 Jl-Au. 



18. A. thalictrifolia Rydb. Stem 2-5 dm. high, glabrous below, finely 

 viscid-puberulent above; leaves twice ternate; leaflets broadly obovate-cuneate, 

 2-3-cleft and crenate at the apex, 1-1.5 cm. long, bluish green; flowers yellow; 

 laminae of the petals 7-12 mm. long, truncate or rarely rounded at the apex; 

 spur very slender from the base; follicles about 3 cm. long, strongly reticulate 

 and pubescent. Rocky ravines: Tex. Colo. Utah Ariz. Submont. Sub- 

 alp. Je-Au. 



19. A. chrysantha A. Gray. Stem 3-10 dm. high, glabrous, or viscid- 

 puberulent above; leaves tri ternate or the upper ternate; leaflets broadly cuneate, 

 3-cleft and round-crenate at the apex, 1.5^4 cm. long; flowers yellow; lamina 

 about 2 cm. long, rounded at the apex; follicles about 3 cm. long, narrower and 

 straighter than in the preceding. Along streams and in ravines: N.M. (? Colo.) 

 Ariz. Submont. My-S. 



21. DELPHINIUM (Tourn.) L. LARKSPUR. 



Annual or perennial herbs, usually with erect branching stems. Leaves 

 alternate, mostly cauline, palmately lobed or divided. Flowers in racemes or 

 panicles, perfect, irregular, zygomorphic. Sepals 5, the posterior produced 

 below into a spur. Petals 2 or 4, the two posterior spurred, the lateral ones, if 

 present, small, all in most species 2-cleft at the apex. Stamens numerous. 

 Pistils 1-5, in ours mostly 3, many-ovuled; stigmas introrse. Fruit many-seeded 

 follicles. 



A. Carpels and follicles 3, rarely 4 or 5. 

 I. Pedicels erect or nearly so. 



a. Sepals white or merely tinged with blue or with a blue spot ; follicles more than 



1 cm. long, about four times as long as broad; seeds squamellate. (I. 



CAROLINIANA.) 

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



erect; stem strigose-canescent throughout. 1. D. Penardii. 



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



mostly horizontal; stem usually glabrous below, viscid above. 



2. D. virescens. 



b. Sepals dark blue; follicles less than 1 cm. long, only 23 times as long as broad; 



seeds not squamellate, but wing-margined. (II. STRICTA.) 

 Lower petals blue and bearded; perennials with fasciculate tuberous roots. 

 Stem glabrous below. 



Stem glabrous throughout; pedicels equalling or exceeding the spur. 

 Leaves pubescent; follicles glabrous. 27. D. Brownii. 



Leaves glabrous and glaucous; follicles strigose. 



25. D. elongatum. 

 Stem puberulent above; follicles viscid- villous. 



Pedicels shorter than the spurs. 3. D. distichum. 



Pedicels longer than the spurs. 4. D. megacarpum. 



Stem more or less pubescent throughout, finely so below, viscid above. 

 Spur with reflexed tip; upper petals with a lanceolate, 2-cleft apex; 



inflorescence appressed-pubescent. 5. D. simplex. 



Spur straight; upper petals with an obliquely ovate-triangular apex, 



slightly 2-toothed; inflorescence villous. 6. D. cyanoreios. 



Lower petals white; roots fleshy, fusiform. 



Stem leafy throughout, viscid. 7. D. diver sicolor. 



Stem leafy only at the base, glabrous below. 8. D. Burkei. 



