Family EUPHORBIACE 93 
1. Polygala verticillata L. Milkwort. 
On dry prairies over the entire state. Cherry county; Dakota 
county; Ewing; Kearney; Lincoln; Minden; Polk county; Red Cloud; 
Weigand; Weeping Water. 
2. Polygala cruciata L. 
Nebraska, according to Gray’s Manual. 
3. Polygala viridescens L. 
Atkinson; Neligh; Rock county. 
4. Polygala alba Nutt. 
Common in prairies in the western part of the state. Anselmo; Bel- 
mont; Box Butte county; Culbertson; Kearney; Newcastle; Phelps 
county; Sioux county; Valentine. 
8. EUPHORBIACE2. 
Spurge Family. 
Plants canescent with stellate hairs. 1. Croton. 
Plants glabrous or pubescent with simple hairs. 
Styles fringed; pistillate flowers in the axils of leafy bracts. 
2. Acalypha. 
Styles 2-cleft; pistillate flowers in involucres accompanied by sev- 
eral staminate flowers. 3. Euphorbia. 
1. Croton. 586. 
1. Croton texensis (Klotzsch.) Muell. Arg. Croton. 
Common in prairies in the western part of the state. Anselmo; 
Banner county; Broken Bow; Deuel county; Franklin; Haigler; Holt 
county; Mullen; Pine Ridge; Sheridan county. 
2. Acalypha. 588. 
1. Acalypha virginica L. Three-seeded Mercury. 
Common in woods in the eastern part of the state. Bellevue; 
Franklin; Grand Island; Lincoln; Riverton; Wahoo; Weeping Water. 
3. Euphorbia. 590. 
Leaves not equilateral, with oblique bases; plants often prostrate. 
spreading. 
Leaves entire, glabrous. 
Stem ascending; leaves linear. 
Glands of the involucre with conspicuous white corolla-like 
appendages. 1. E. petaloidea. 
Glands greenish white or obsolete, inconspicuous. 
2. E. flagelliformis. 
Stems prostrate or spreading; leaves broader. 
Leaves oblong or ovate, usually mucronulate. 3. E. geyeri. 
Leaves orbicular to oval, obtuse. 
Capsule 2 mm. in diameter, seeds smooth, 1 mm. long. 
4, E. serpens. 
Capsule 3 mm. in diameter, seeds wrinkled. 10. E. fendleri. 
Leaves serrate or dentate, sometimes only near the tip. 
Glabrous or nearly so. 
Plants prostrate or spreading; leaves 4 to 15 mm. long. 
Seeds pitted or faintly wrinkled. 5. E. serpyllifolia. 
