104 NATURAL HISTORY BULLETIN. 



the southwestern quarter of the state. Our specimens are 

 from Shelby and Decatur counties. We have observed the 

 species in Union and Clark counties. The State Univer- 

 sity herbarium has specimens from Mahaska and Pottawat- 

 tamie counties. Prof. Bessey reports the species from 

 Warren county. 



Bessey, Contr. to the Flora of Iowa in Fourth Rep. Iowa Agr. Col., p. 

 90, 1872; Arthur, Contr. to the Flora of Iowa, p. 5; Shimek, Bull. Lab. 

 Nat. Hist., S. U. I., vol. 3, p. 200; Fitzpatrick, Proc. Iowa Acad, of 

 Sciences, vol. 5, p. 135; vol. 6, p. 177; Manual of the Flowering Plants 

 of Iowa, p. 6. 



Delphinium tricorne grandiflorum new var. 



Petals mostly 8 , the two upper as usual and six others , some- 

 times 6 or 7 ; anterior sepal spurred similarly to the pos- 

 terior one but with a smaller spur. Type locality, L,amoni, 

 Iowa. 



For three consecutive seasons we studied individuals col- 

 lected in one locality. The deviation of the specimens 

 from the normal type was very pronounced and we think 

 constant enough to warrant distinction as a variety. 



Fitzpatrick, Proc. Iowa Acad, of Sciences, vol. 6, p. 177, where this 

 form is spoken of in general terms only but not named. 



Delphinium carolinianum Walt. Fl. Car., p. 155. 

 1788. 



Stem slender, 1-3 feet high, nearly solid, more or 

 less pubescent; leaves 3-5-parted, the divisions cleft into 

 linear segments; raceme strict; flowers blue to whitish, 

 spur curved upward; follicles 3, erect or slightly spreading. 

 Delphinium azureum Mx. Fl. Bor. Am., vol. 1, p. 314, 

 1803. 



This species is common in the western portion of the 

 state, occurring on the prairies, and blooming in June. In 

 the eastern portion of the state it is infrequent or rare. 



Our specimens are from Muscatine, Jefferson, Decatur, 

 Union, Adams, Clark, Montgomery, Pottawattamie, Shelby, 



