46 RANUNCULACE^. Delphinium. 



* * Seeds with a cellular more or less loose and rugulose coat : stem scapiform, with only 

 a cluster of radical and thickish or succulent leaves, from thickish branching roots, merely 

 puberulent or glabrate, blue-flowered. 



D. scaposum, Gkeene. Leaves of rounded or reniform outline and mostly oblong or sub 

 cuueate divisions and lobes : scape a foot or two high ; raceme several-many-flowered : sepals 

 oblong, fully half inch long and shorter than the more or less curved spur : follicles oval, 

 erect: immature seeds with rugose and rugulose arilliform coat. — Bot. Gaz. vi. 1.56.1 — 

 IJry region of S. W. Utah, Palmer, and Arizona, Newhernj, Palmer, Greene, Pringle, Rusby, 

 Lemmon.'^ lu Arizona is found iu company with D. azureum. 



C* uliginosum, Curran. Leaves so far as known all cuneate and 3-cleft, with lobes entire 

 or 1-3-toothed: scape commonly branching; racemes few(6-18)-flowered : sepals oval, a 

 third to half inch long, about equalling the straight spur : follicles turgid-oblong, erect, 

 nearly half inch long ; seeds with coat loose only at the angles, minutely rugulose and 

 muriculate* — Bull. Calif. Acad. Sci. i. 151.^ — Lake Co., California, "in swampy ground, 

 almost iu the water," July, 1884, Mrs. Curran. 



* * * Seeds with a loose cellular coat, which becomes transversely rugose-squamellate : 

 root branching or fasciculate and elongated, thickish, but not tuberous ; stem leafy, or 

 when depauperate rarely subscapose : flowers from blue to white. 



D. aziireum Micnx. Stem a foot or two high, mostly strict and simple, puberulent : 

 leaves 3-5-parted and divisions mostly again 3-5-parted or cleft usually into linear lobes : 

 raceme spiciform, usually many-flowered : flowers azure-blue or paler and often white, 

 sometimes greenish white : sepals often with a brownish spot : follicles oblong, erect. — Fl. 

 i. 314; Deless. Ic. Sel. i. t. 60; Torr. & Gray, Fl. i. 32, probably not Lindl. Bot. Reg. t. 

 1999, from "California." ? D. Carolimanum,W2i\i. Car. 155. D virescens, Nutt. Gen. ii. 

 14; Torr. & Grav, 1. c.^ — Sandy or stony soil, N. Carolina and Illinois to Texas and 

 Arizona, north to Saskatchewan and Wyoming; fl. early summer. (Adj. Mex.) 



Var. vimineuni, Gray. Broader-leaved, looser flowered : stem 2 to 4 feet high, 

 sometimes branched : flowers violet to whitish. — Bot. Gaz. xii. 52. D. vimineum, Don iu 

 Sweet, Brit. Fl. Gard. ser. 2, t. 374 ; Hook. Bot. Mag. t. 3593 ; Torr. & Gray, 1. c. D. azu- 

 reum, Lindl. Bot. Reg. t. 1999, as to f. 2, possibly of the rest. D. virescens. Gray, PI. 

 Lindh. ii. 142. — Texas, Berlandier, Drummond, Lindheiiner, Wright, the last D. simplex, 

 Gray, PI. Wright, ii. 8. 



* * * * Seeds with a loose cellular coat, either arilliform or when dry merely scarious- 

 winged or margined at the angles, not at all squamelliferous : flowers blue or violet-purple, 

 often partly or wholly varying to white, at least the petals. All except the first western 

 species. 



•i- Roots fasciculate (or rarely simple) at base of stem, more or less elongated and thickish 



but not tuberiform, or approaching it only iu the last species. 

 ++ Stem strict, tall or robust, many-leaved : racemes many-flowered, simple or paniculate : 



pedicels seldom longer than flower or fruit, ascending or erect : follicles hardly if at all 



diverging, not over half inch long and mostly short-oblong. 

 D. exaltatum, Ait. Stem 3 to 7 feet high : leaves nearly glabrous, 3-5-parted or almost 

 so ; tlie divergent divisions cuneate or cuueate-lanceolate, 3-cleft or lateral ones 2-cleft into 

 lanceolate lobes : raceme elongated, virgate, at base commonly panicled : flowers blue 



1 Add syn. D. decorum, var. scajwsum, Huth, Delph.-Art. N. A. 9. 



2 Also reported from S. Colorado, by Miss Eastwood, Zee, ii. 227. 



3 Description moditied in the light of excellent specimens collected near the type locality by 31r. 

 J. W. Blarikinship. 



4 Add syn. D. decorum, var. uliginnsum, Huth, 1. c. 



6 Add syn. 1). Penhardi, Huth, Helios, x. 27, Delph.-Art. N. A. 10, & Bull, Herb. Boiss. i. 33fi, 

 t. 16, f. 2 (a form with white flowers and ascending .somewliat curved spurs); also D. camporum, 

 Greene, Erythea, ii. 183 (a very similar form with spurs erect). As striking as these forms may be, 

 they do not appear (in a considerable series of specimens) to be distinguished from D. azureum by any 

 constant character. The flowers vary through all .shades from blue to white, and the position of the 

 spur both in the pale blue and white flowered forms varies from horizontal to erect through every 

 degree of oljliquity, D. Geyeri, Greene, 1, c. 189, is apparently a form of the same species. 



