583 Rydberg : Delphinium Carolinianum 



Bractlets close under the calyx on the thickened end of the pedicels. 



Sepals greenish or yellowish white ; segments of the upper leaves oblong. 



6. D. virescens. 

 Sepals blue or bluish ; segments of the upper leaves narrowly linear. 



Plant tall, slender, green ; bractlets narrowly linear, almost subulate. 



Seeds strongly wing-margined, only slightly rugose- squamellate ; raceme 



simple and narrow. 7. D. Carolinianmn. 



Seeds not wing-margined, strongly squamellate ; raceme often branched. 



8. D. vimineum. 

 Plant low, stout, more or less canescent ; bractlets linear or lanceolate. 

 Sepals deep blue ; pedicels ascending. 9. D. Geyej-i. 



Sepals light blue or white, tinged with blue or purple ; pedicels erect. 



10. D. Wootoni. 



I. Delphinium geraniifolium sp. nov. 



Stem from a deep woody perennial root, stout, 3-4 dm. high, 

 finely grayish-strigose ; leaves numerous, especially at the base, 

 long-petioled, grayish-strigose, mostly 5-divided to the base ; di- 

 visions cuneate, twice 2-3 -cleft into broad oblong divisions ; 

 racemes many-flowered, somewhat branched ; pedicels ascending ; 

 bractlets linear, 2-4 mm. below the blue calyx ; spur stout, hori- 

 zontal, about one half longer than the petals, slightly curved ; 

 upper petals brownish, tipped with blue ; seeds unknown. 



This is evidently nearest related to D. Gcycri, but differs by the 

 broad leaf segments and the form and position of the bractlets. 

 Dr. Gray referred it to D. viinincuin, which it resembles very little. 



Arizona: Charles Valley, 1883, H. H. Rusby. 



2. Delphinium albescens sp. nov. 



Generally tall, 3-15 dm. high, from a woody branched root, 

 finely pubescent or glabrate below, somewhat viscid above ; leaves 

 rather variable, from 5 to i 5 cm. in diameter, repeatedly divided into 

 linear or the lower often into oblong divisions ; raceme long and 

 simple, sometimes 5— 6 dm. long; pedicels erect, 1—2 cm. long ; 

 bractlets narrowly linear, borne 2—4 (in fruit often 6-8) mm. be- 

 low the calyx ; sepals white with a blue spot and sometimes tinged 

 with blue ; spur stout, about twice as long as the petals, straight 

 or slightly curved, tinged with blue, generally horizontal or as- 

 cending ; upper petals very oblique at the summit, tinged with yel- 

 low ; the lateral ones bearded, 2-cleft, but the lobes not diverging; 

 follicles cylindric, pubescent; seeds 1.5—2 mm. long, brown, 

 sharply angled but not wing-margined, rather strongly squamellate. 



This species has been included in D. Carolmiammt, but is easily 

 distinguished by the color of the flowers, the form and position of 

 the bractlets, the stouter habit, and especially by the seeds. Its 



