82 Trans. Acad. Sci. of St. Louis. 



Spkcimkns kxaminkd. — Missouri: Type specimens as cited under type 

 locality.— Kansas: Riley County, J. B. Norton, 1896. 



Delphinium Nortonianum n. sp. 



An erect biennial or short-lived perennial from a woody 

 branched root; 7.5-15 dm. high, simple or sometimes 

 branched, the branches erect-ascending, 1.5-4.5 dm. long, 

 finely pubescent or canescent, becoming smoothish below, the 

 upper part, including the long pedicels, densely glandular- 

 pilose and viscid; leaves rather variable, from 5-10 cm. wide, 

 repeatedly divided into linear to linear-oblong divisions; 

 racemes long and simple, often 4-6 dm. long; pedicels erect, 

 1-5 cm. long; bractlets narrowly linear, borne close under 

 the calyx on the thickened end of the pedicel ; sepals deep 

 blue, with a tuft of yellow hairs on the back near the tip, 

 canescent at the base and along the back to the tip, or some- 

 times all over without, glabrous within; spur stout, about 

 twice as long as the petals, straight or slightly curved at the 

 tip, of the same color as the sepals, strongly ascending, 

 densely canescent; upper petals oblique at the summit, yellow 

 below, tipped with blue ; lateral petals with long white beard 

 on upper portion, 2-cleft, the lobes not spreading, blue below, 

 tipped with yellow; follicles cylindric, densely canescent 

 when young, smoothish when old, nearly 2 cm. long, rectic- 

 ulate-veiny, cuspidate at tip; seeds 2-2.5 mm. long, brown, 

 angular, strongly wing-margined, and strongly rugose-squa- 

 mellate.— Plate XIII. 



Type locality : Monteer, Jackson County, Missouri ; collected 

 by B. F. Bush, No. 377, May 24, 1900; type in Herb. 

 Missouri Botanical Garden, duplicate in Herb K. K. 

 Mackenzie. 



Very common in rocky barrens in the Ozark Mountain 

 region in Southern Missouri. 



This species is most closely related to D. Garolinianum 

 Walt., but differs from that species in the larger, more 

 strongly rugose-squamellate seeds, the strongly ascending 

 spurs, and the loose floccose pubescence. From D. albescens 

 Rydb. it may be distinguished by the deep blue flowers, the 

 strongly wing-margined seeds, and the presence of the bractlets 

 under the calvx. Named in honor of Mr. J. B. S. Norton, 



