ASCLEPIADACEAE 109 



7. Asclepias syriaca L. Common Milkweed. 

 A common weed in fields and prairies all over the state. Ainsworth; 

 Anselmo; Crete; Lincoln; Peru; St. Paul; Tecumseh; Weeping Water; 

 Wymore. 



8. Asclepias speciosa Torr. Showy Milkweed. 

 Fairly common in prairies especially in the western part of the state. 

 Callaway; Deuel County; Holdrege; Lincoln; Simeon. 



9. Asclepias arenaria Torr. 



Common in dry soil in the sand-hills and foot-hills. Cheyenne County; 

 Long Pine; Minden; Plummer Ford; Riverton; Valentine. 



10. Asclepias ovalifolia Dec. 

 Reported from Weeping Water. 



11. Asclepias verticillata L. 



Common in dry prairies all over the state. Brock; Cherry County; 

 Fairbury; Indianola; Laurel; Lincoln; Niobrara; O'Neill. 



12. Asclepias pumila (A. Gray.) Vail. 



Common in dry prairies, most abundant in the western part of the 

 state. Anselmo; Belmont; Box Butte County; Haigler; Kearney; Mc- 

 Cook; Ponca River; Ft. Niobrara; Thedford. 



2. Asclepiadora. 745. 



1. Asclepiadora viridis (Walt.) A. Gray. 



In the southwestern part of the state, along the Republican River. 



Red Cloud. 



3. Acerates. 745. 



Glabrous or puberulent, umbels usually several. 

 Umbels sessile or subsessile. 

 Hoods entire at the apex. 



Leaves oval, oblong or ovate, over 1 cm. wide. 



1. A. viridiflora. 

 Leaves lanceolate or linear, less than 1 cm. wide. 



Leaves lanceolate. i^-2 mm. wide. la. A. vir.lvesii. 



Leaves linear, ste mlow, umbel often solitary. 



lb. A. vir-linearis. 

 Hoods 3-toothed at the apex. 2. A. vir-linearls. 



Umbels distinctly peduncled. 



Stems puberulent, leaves 3-13 mm. wide. 3. A. floridana. 



Stems glabrous, leaves 1-5 mm. wide. 4. A. auriculata. 



Hirsute all over; umbel terminal, solitary. 5. A. lanuginosa. 



1. Acerates viridiflora (Raf.) aton. 



Common in dry prairies throughout the state. Banner County; Broken 



Bow; Deuel County; Lincoln; St. James; Crete; Saunders County; 



Valentine. 



1a. Acerates viridiflora invesii Britton. 



Acerates viridiflora lanceolata (Ives.) Gray. 

 Common throughout the state. Cushman; Lincoln; Norway; Plummer 

 Ford; St. James; Wahoo. 

 lb. Acerates viridiflora linearis A. Gray. 

 Cherry County; Norway; St. James. 



