Rydberg: Studies on the Rocky Mountain flora 321 



divided to the base into 3-5 narrowly cuneate di\isions, these 

 again cleft into linear-oblong, obtuse, mucronate lobes; sepals 

 light blue, slightly pubescent outside, oblong, obtusish, about I 

 cm. long; spur about i cm. long, usually somewhat curved; upper 

 petals 8 mm. long, yellowish white, slightly lobed; lower petals 

 light blue, with obtusish, wavy lobes; follicles 8-10 mm. long, 

 slightly puberulent, nearly straight. 



This species is related to D. scaposuni but differs in its more 

 leafy stem and in the more deeply dissected basal leaves with 

 narrower segments. It grows in arid places. 



Utah: Southern Utah, 1877, Palmer 11 (type, in herb. Columbia 

 University). 



Arizona: i8y6, Palmer j. 



Delphinium xylorrhizum sp. nov. 



A perennial with a stout woody root, related to D. scaposum- 

 but not at all scapiform; stem 2-3 dm. high, glabrous; leaves 

 petioled, glabrous, fleshy; blades of the basal ones divided into 

 3-5 broadly cuneate divisions, these cleft and lobed with ovate or 

 rounded lobes; stem leaves with linear-oblong lobes; sepals dark 

 blue, oval, obtuse, pubescent outside; spur stout, about 15 mm. 

 long; upper petals yellowish, about 7 mm. long, slightly cleft, 

 with obtuse lobes; lower petals blue, with sinuate, obtuse lobes; 

 follicles canescent-strigose. 



This species differs from D. scaposum Greene in its leafy stem 

 and its strigose follicles. It grows on clayey hillsides. 



Montana: Lima, July i, 1895, Shear 342g (type, in herb. 

 N.Y.Bot. Garden). 



Delphinium Helleri sp. nov. 



A perennial with a short rootstock and fleshy roots; stem about 

 3 dm. high, viscid-pubescent throughout, few-leaved; leaf blades 

 3-5 cm. broad; the lower dissected into linear, obtuse divisions, 

 more or less viscid-pubescent; the upper with narrowly linear, 

 acute divisions; flowers few; the lower pedicels 4-6 cm. long, 

 ascending; bractlets subulate, inserted some distance below the 

 calyx; sepals dark blue, more or less pubescent, oval, about 15 

 mm. long; spur 2-2.5 cm. long, straight and attenuate; upper 

 petals blue, tinged with yellow only on the lower edge, entire or 

 slightly cleft, lower petals blue, with acute, crenate lobes; follicles 

 viscid-pubescent, nearly straight, 2 cm. long. 



