EUPHORBIACEAE 85 
Leaves mostly opposite. 16. E. dentata. 
Leaves alternate, very variable, the upper often blotched with 
red, 17. E. heterophylla. 
1. Euphorbia petaloidea Engelm. 
Common in the western part of the state, in sandy soil. Anselmo; 
Banner County; Benkleman; Franklin; Pine Ridge; Schuyler; Sheri- 
dan; Sioux County; Valentine; Weigand; Brunswick. 
2. Euphorbia flagelliformis Engelm. 
Ft. Robinson; Valentine. 
3. Euphorbia geyeri Engelm. & Gray. 
On dry sandy ridges and bluffs in the western part of the state. Long 
Pine; Nattick; Paddock; Plummer Ford; Thedford; Valentine. 
4. Euphorbia serpens H. B. K. 
In prairies all over the state. Bassett; Kennedy; Lincoln; Niobrara; 
Red Cloud. 
5. Euphorbia serpyllifolia Pers. 
In prairies and meadows throughout the state. Grand Island; Lincoln; 
Niobrara; Saunders County; Valentine. 
6. Euphorbia albicaulis Rydb. 
Nebraska according to Britton’s Manual. 
7. Euphorbia glyptosperma Engelm. 
In sandy prairies and fields, most abundant westward. Bordeaux; 
Broken Bow; Dismal River; Fairbury; Franklin; Hooker County; 
Mullen; Newcastle; Thedford; Valentine. 
8. Euphorbia maculata L, © : 
Throughout the state. Ainsworth; Fairbury; Endicott; Lincoln; Saun- 
ders County; Steele Creek; Valentine; Weeping Water. 
9. Euphorbia humistrata Englem, 
In the eastern part of the state. Lincoln; Red Cloud; Weeping Water. 
10. Euphorbia fendleri T. & G. 
In the western part of the state. Cheyenne County; Upper Lawrence 
Fork, 
11. Euphorbia nutans Lag. 
A common weed over most of the state. Arapahoe; Lincoln; Minden; 
Pishelville; Red Cloud; Saunders County. 
12. Euphorbia hexagona Nutt. 
Common in dry sandy soil throughout the state. Brunswick; Bellevue; 
Haigler; Norfolk; Pine Ridge; Red Cloud; Riverton; Ravenna; Spen- 
cer; Valentine, : 
13. Euphorbia corollata L, 
Common in meadows in the eastern part of the state. Crete; Belle- 
vue; Cass County; Lincoln; Nemaha; Peru; Wahoo; Weeping Water. 
14. Euphorbia marginata Pursh. Snow on the mountain. 
A common pasture weed in clay soil. Anselmo; Beatrice; Benkleman; 
Crete; Laurel; Lincoln; Niobrara; Neligh; Wymore. 
15. Euphorbia cuphosperma Bois. 
In shady canons in the foothills, Banner County, 
16. Euphorbia dentata Michx. 
Over most of the state. Franklin; Lincoln; Riverton. 
17. Euphorbia heterophylla Michx, 
In woodlands and thickets mostly in the eastern part of the state. 
Crete; Franklin; Indianola; Keya Paha; Lincoln; Ft. Niobrara; Nio- 
