454 MINNESOTA BOTANICAL STUDIES. 



the spurs ; bractlets of lower pedicels lobed ; bractlets of upper 

 pedicels slender and near the flowers ; sepals about equal to 

 spur in length, blue within, tinged with yellow outside ; upper 

 petals yellow with blue tips ; lower ones either blue or yel- 

 lowish, 2-lobed with a few long, white hairs on inside of lobes : 

 follicles 3, large, slightly spreading; seeds nearly black, coats 

 roughened, forming slight wings at the angles. Cool banks of 

 ravines in plains at base of the Sierra Madre, Chihuahua, Mex. 

 Collected first by C. G. Pringle (n. 1184), Sept. 27, 1887. 

 Differs essentially from D. scopulorum in its finely dissected 

 leaves (f). 



51. D. leptophyllum HEMSL. Diagn. PI. Nov. 2 : 18. 1879. 



Stem 3 to 4 feet high, glabrous, somewhat branched : leaves 

 glabrous, deeply 5-parted, and cut into oblong to linear lobes ; 

 bracts entire, linear : inflorescence open, few-flowered ; pedicels 

 i to 2 inches long ; bractlets remote from flower : flowers large, 

 blue ; spur large ; sepals puberulent, ovate, obtuse, 2 /$ inch 

 long ; petals dull yellow ; upper ones slightly 2-lobed, nearly 

 glabrous ; lower ones deeply 2-lobed, slightly bearded : folli- 

 cles 3, densely villose when young, half inch long when mature, 

 not spreading : seed slightly winged, and transversely wrinkled. 

 October. San Luis Potosi and Montes San Miguelito, Guana- 

 juata, southern Mexico (f). 



52. D. Wislizeni ENGELM. in Wisliz. Tour N. Mex. 106. 

 1848. 



Stem simple, 2 to 2)4 feet high, slender, glabrous, glaucous; 

 petioles elongated, lower ones dilated at base : leaves cut into 

 linear segments; pedicels long: flowers few, spur 2^ inches 

 long, blue, slightly pubescent outside ; the outer sepal acute, 

 others obtuse : follicles glabrous even when young. Wislizeni 

 region, Mexico. Later found near Cosihuiriachi, 8,000 feet. 

 In flower in Sept. (f). 



EXCLUDED. 



D. urceolatum]hco^ Coll. I: 153, 1786, is figured in Bot. 

 Mag. n. I79 1 * but no nativity is given. From character it may 

 be allied to D. exaltatum, but it is probably not American. 



