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 revolute-niargined, 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; folhcles pubescent. A. coerulea calcarea M. E. Jones. Moist sandstone 

 cliifs: 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.; folhcles 2.5 cm. A. coerulea alpina A. Nels. 

 A. coerulea ftavescens iones. 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. Suhmont. — 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. Suhmont. 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-canesfcnt tliroughout. 1. D. Penardii. 



Lobes of the lateral petals not divci'gcnt; lower pedicels not elongate; spur 



mostly horizontal; stem usually glabrous below, viscid al)ove. 



2. D. vire.icens. 



b. Sepals dark blue; follicles less than 1 cm. long, only 2-Z times as long as broad; 



seeds not squamellate, but wing-margined, fll. STRifTA.) 

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

 Stem glabrous below. 



Stem glabrous throughout; pedicels equalling or exceeding the spur. 

 Leav&s pubescent; follicles glabrous. 27. D. Brownii. 



Leaves glabrous and glaucous; follicles .strigose. 



25. D. elongalum. 

 Stem piiberulent above; follicles viscid- villous. 



Pedicels shortci- than the spurs. .3. D. (lislichum. 



Pedicels longer tl'an the spui's. 4. D. viegacarpum. 



Stem mort^ ot less pubescent Ihrougliout, finely so below, viscid above. 

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



inflorescence api)resse(l-i)ubeKcent. 5. D. simplex. 



Spur straight; ujiper jjctals 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. dirersicolor. 



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



