10 RANUNCULACE^E. (CROWFOOT FAMILY. J 



# Caulescent : spur longer or shorter than the calyx. 



*- Spur straight. 



** Flowers red and yellow. 



1. A. Canadensis, L. Spurs much longer than the sepals: flowers 2 

 inches long, scarlet, yellow inside (or rarely all over), nodding so that the 

 spurs turn upwards : limb or lip of the petals distinct : stamens and styles 

 longer than the ovate sepals. — Along subalpine rivulets and eastward across 

 the continent. 



2. A. formosa, Fisch. Like the preceding or stouter : spurs shorter, not 

 longer than the elongated sepals. — Colorado and northward, thence westward 

 into Oregon. 



++ ++ Flowers never red. 



3. A. CGBrulea, James. Stem 1 to 3 feet high, glabrous : leaves mostly 

 radical, glaucous beneath, the leaflets deeply cleft : flowers 2 to 2 J inches in 

 diameter, pale blue, sometimes ochroleucous, pinkish, or white : spur very 

 slender: sepals rhomboid-ovate, longer than the limb of the petals. — On 

 shaded slopes throughout the Rocky Mountains. A very beautiful and 

 showy plant. 



4. A. chrysantha, Gray. Usually taller and more slender : peduncles 

 often pubescent: flowers bright yellow throughout: spurs even more slender: 

 sepals lanceolate-oblong, longer but not broader than the limb of the petals. — 

 Proc. Am. Acad. viii. 621. Colorado and southward. 



-h- -t- Spur hooked at the tip. 



5. A. flavescens, Watson. Plant 2 to 3 feet high, glabrous except the 

 pubescent peduncles and carpels : flowers yellow, the sepals frequently tinged 

 with scarlet : spurs shorter than the spreading or reflexed oval or oblong- 

 ovate sepals : limb large and dilated : stamens long exserted. — Bot. King's 

 Rep. 10. Wyoming, Montana, and Idaho. 



6. A. brevistyla, Hook. Stems 6 to 8 inches high, spreading : leaves 

 bi-ternate ; leaflets 3-lobed, crenate : flowers small, blue, about 6 lines long, 

 including the spur: sepals obloug-ovate : petals a little exceeding the stamens. 

 — A. vulgaris, var. brevistyla, Gray. Colorado and northward into British 

 America. 



* * Acaulescent : spur shorter than the calyx : flowers blue. 



7. A. Jonesii, Parry. Minutely soft-pubescent : scape 1 to 3 inches 

 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: pods reticulated, smooth. — Am. Nat. 

 viii. 211. Summit of Phlox Mountain, Wyoming, Parry. 



9. DELPHINIUM, L. Larksptjk. 



Sepals 5, petal-like. Petals 2 or 4, irregular ; when 4, the upper 2 developed 

 backwards into a spur which is enclosed in the spur of the calyx. Pod9 

 many-seeded. — Erect herbs usually with palmately lobed, cleft, or dissected 

 leaves, and racemose flowers, which are blue shading to white. 



