32 RANUNCULACE.E. Delphinium. 



6. D. azureum (Michx.): petioles slightly dilated at the base; leaves 3- 

 5-parted, many-cleft, with linear lobes; racemes strict; petals shorter than 

 the sepals ;the lower ones deeply 2-clcrt, densely bearded; claw hispid on one 

 side, the other side with a spur-lil<:e process at its base ; spur ascending. 



a. leaves (and lower part of the stem) nearly glabrous; lower petals with 

 a yellowish pubescent line externaOy ; spur somewhat incur\-ed, longer than 

 the sepals; lobes of the lower petals somewhat obtuse; flowers azure. — 

 D. azureum, MicJix. ! fi. 1. p. 314 ; Piirsh, fl. 2. p. 371 ; DC. prodr. 1. p. 

 54; Deless. ic. 1. t. 60; Ell. sk. 2. p. 18. D. Carolinianum, Walt. Car. p. 



135- 



/?. canescently pubescent ; divisions of the leaves many-cleft; segments 

 all linear-subulate; flowers smaller, azure; spur incurved. — D. azureum, 

 Nutt. gen. 2. p. 14. 



y. puberulent; segments of the upper leaves subulate; flowers ver}' pale 

 blue ; spur straight, about as long as the sepals ; lobes of the lower petals 

 narrow, acute, someAvhat divaricate. 



S. stem densely velutinous; leaves minutely pubescent, with narrowly 

 linear or subulate segments; flowers pale blue; sepals with a brown pubes- 

 cent spot ; spur slightly curved ; lobes of the lower petals oblong, acutish. 



e. minutely puberuleftt ; stem velutinous above ; leaves 3-parted. many- 

 cleft ; segments divaricate, very acute ; flowers large, greenish-white ; se- 

 pals with a brownish spot ; spur thick, somewhat curved. 



Var a. North Carolina to Georgia! Texas, Dnimmond .' /?. Arkansas, 

 Nuttall ! y and S. Arkansas, JDr. Pitcher! 0. Lake Winnipeg, Dr. 

 Houghton ! 



7. D. viminenm (Don): petioles scarcely dilated at the base; leaves flat, 

 3-parted ; segments cuneifonn, obtuse, 3-lobed, mucronulate, uppermost ones 

 linear, undivided or 3-parted ; racemes loose, velvety ; limb of the inferior 

 petals bifid at the summit; spur straight, as long as the sepals; ovaries silky. 

 Don in Sweefs Brit.Ji. gard. ^.374; Hook.! in hot. mag. t. 3593. 



Velasco, Texas, Drummond! July-Aug. — Stem 1-3 feet high, slightly 

 branched, slender. Leaves all petiolate ; the seginents narrow. Flowers 

 middle sized, bright azure. Sepals oblong, rather obtuse, with a callous pro- 

 tuberance near the middle. "Upper petals resembling the carina of a papilio- 

 naceous flower. Lower petals with the limb spreading, purple, trifid, beard- 

 ed with a tuft of yellow hairs." Hook. — In our ;?pecimens of what we con- 

 sider to be this species, the lower petals are not bearded. The plant seems 

 to be nearly allied to D. azureum. 



8. D. virescens (Nutt.) : pubescent ; petioles scarcely dilated at the base ; 

 leaves 3-5-parted, the middle division mostly undivided, lateral ones 2-3- 

 cleft; lobes lanceolate; raceme loose, few-flowered; sepals oblong or lanceo- 

 late; spur longer than the sepals, ascending; lower petals deeply 2-cleft; 

 claw gibbous at the base. — Nutt. ! gen. 2. p. 14; DC. prodr. 1. p. 53. 



Plains of Missouri and Arkansas, Nuttall ! North Carolina, Schiceim'tz ! 

 Georgisi, Le Conte! .Tune.— Stem 8-12 inches high. Raceme simple. Pe- 

 dicels longer than the flowers. Bracts subulate. Flowers large, yellowish 

 or greenish white, minutely pubescent. Sepals marked with a brownish 

 spot near the apex, much longer than the petals. Spur straight or somewhat 

 incurved. Lower petals rather densely bearded. Ovaries 3. 



9. D. variegatum : pubescent ; petioles dilated at the base ; leaves 3- 

 parted ; divisions cuneiform, many-cleft, with the lobes bnear and rather ob- 

 tuse ; raceme few-flowered ; spur scarcely as long as the sepals ; lower petals 

 orbicular-ovate, 3-lobed, Avith the middle lobe small, sparingly bearded. 



California, Douglas ! — Stem 1-2 feet high, sulcate. Raceme strict, nearly 

 simple. Lower bract 3-cleft. Sepals deep violet-blue, somewhat pubescent 



