76 CARYOPHYLLALES 



Involucres in umbels, 4-5 mm. high. 2. E. flavum. 



Involucres capitate, about 3 mm. high. 



Flowers yellow, glabrous. 3. E. chrysocephalum. 



Flowers white or rose-colored, villous. 4. E. multiceps. 



Involucres in open cymes. 

 Peduncles not deflexed. 



Perennials with a woody base. 

 Flowers yellow; leaves all basal. 



Leaves oblong to linear-oblong, flat. 5. E. campanulatum. 



Leaves narrowly linear, edges revolute. 6. E. brevicaule. 



Flowers not yellow, usually white, stems leafy. 

 Style branches longer than the ovary, exserted. 



7. E. corymbosum. 

 Style branches shorter than the ovary, included. 



Leaves oblong or oblanceolate. 9. E. microthecium. 



Leaves linear or linearToblong. 8. E. effusum. 



Annuals, not woody at the base. 



Stem leafy below. 10. E. annuum. 



Leaves all basal. 11. E. gordonii. 



Pe.duncles deflexed. 12. E. cernuum. 



1. Eriogonum alatum Torr. 



In sandy soil in the western part of the state. Deuel County. 



2. Eriogonum flavum Nutt. 



In the sand-hill and foot-hill regions. Belmont; Deuel County; Hat 

 Creek Basin; Pine Ridge; Harrison. 



3. Eriogonum chrysocephalum A. Gray. 

 Nebraska according to Rydberg's Flora of Colorado. 



4. Eriogonum multiceps Nees. 



In dry prairies and badlands of the western part of the state. Hat 

 Creek Basin; Scotts Bluff County; Sioux County. 



5. Eriogonum campanulatum Nutt. 



Nebraska according to Rydberg's Flora of Colorado. 



6. Eriogonum brevicaule Nutt. 



On dry plains in the western part of the state. Scotts Bluff County. 



7. Eriogonum corymbosum Benth. 

 Cheyenne County. 



8. Eriogonum effusum Nutt. 



On dry prairies in the western part of the state. Kimball County; 

 Scotts Bluff County. 



9. Eriogonum microthecum Nutt. 



In dry soil in the western part of the state. Cheyenne County; Kim- 

 ball County. 



10. Eriogonum annuum Nutt. 



Common in sand-hill and foot-hill regions. Anselmo; Brunswick; 

 Haigler; Harrison; Kearney; Mullen; Pine Ridge; Pishelville; Sioux 

 County; Valentine. 



11. Eriogonum gordonii Benth. 



Rare in the western part of the state. 



12. Eriogonum cernuum Nutt. 



Dry plains and badlands of the western part of the state. Banner 

 County; Cheyenne County; Kimball County; Scotts Bluff County. 



