POLYGONACEAE 75 



5. Atriplex hortensis L. 



Introduced but not common. Bassett; Chadron; Hastings; Johnstown; 



Riverton. 



5. Eurotia. 374. 

 1. Eurotia lanata (Pursh.) Moq. 



A xerophyte of the foothill region of the western part of the state. 

 Banner County; Cheyenne County; Hat Creek Basin; Lawrence Fork. 



6. Kochia. 374. 

 1. Kochia scoparia L. Roth. 



Cultivated in flower gardens and often escapes. Blue Hill; Minden- 

 Oxford; Red Cloud. 



7. Corispermum. 374. 

 FYuit 3-5 mm. long. 1. c. hyssopifolium. 



Fruit about 2 mm. long. 2. C. nitidum. 



1. Corispermum hyssopifolium L. 



In sandy soil. Crawford; Scotts Bluff. 



2. Corispermum nitidum Kit. 



Usually in poor, sandy soil. Box Butte County; Lincoln; Valentine. 



8. Salicornia. 375. 



1. Salicornia herbacea L. Glasswort. 



Common in salt basins along Salt Creek, Lincoln. 



9. Sarcobatus. 375. 



1. Sarcobatus vermiculatus Torr. 



In the badlands of the western part of the state. Hat Creek Basin. 



10. Dondia. 376. 



1. Dondia depressa (Pursh.) Britton. 



Sueada depressa (Pursh.) Wats. 

 In salt basins and alkaline soil. Alliance; Crawford; Chadron; Lexing- 

 ton; Lincoln; Minden. 



11. Salsola. 376. 



1. Salsola tragus L. 



Introduced and a common weed in dry localities or in dry seasons. 



Aten; Genoa; Lincoln; Long Pine; Valentine. 



10. POLYGONACEAE. 



Leaves without ocreae, flowers involucrate. 1. Eriogonum. 

 Leaves with ocreae, flowers not involucrate. 



Outer sepals spreading in fruit, the inner usually winged often tubur- 



culate. 2. Rumex. 



Outer sepals erect in fruit, sometimes winged; the inner never 



winged or tuberculate. 



Achene little if at all exserted. 4. Polygonum. 



Achene much exserted. 3. Fagopyrum. 



1. Eriogonum. 351. 



Achene 3-winged. 1. E. alatum. 



Achenes not winged. 



Involucres in umbels or capitate clusters. 



