Family POLYGONACEA 85 
10. Dondia. 376. 
1. Dondia depressa (Pursh) Britton. Sea-blite. 
In salt basins and alkaline soil. Alliance; Crawford; Chadron; Lex- 
ington; Lincoln; Minden. 
11. Salsola. 376. 
1. Salsola pestifer A. Nels. Russian Thistle. 
Introduced and a common weed, especially in dry localities or in dry 
seasons. Aten; Genoa; Lincoln; Long Pine; Valentine. 
10. POLYGONACE. 
Buckwheat Family. 
Leaves without ocrex; flowers involucrate. 1. Eriogonum. 
Leaves with ocree; flowers not involucrate. 
Outer sepals spreading in fruit, the inner usually winged, often 
tuberculate. 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. 
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. microthecum. 
Leaves linear or linear-oblong. 8. E. effusum. 
Annuals, not woody at the base. 
Stem leafy below. 10. E. annuum. 
Leaves all basal. 11. E. gordonii. 
Peduncles defiexed. 12. E. cernuum. 
1. Eriogonum alatum Torr. Winged Eriogonum. 
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; Har- 
rison; Hat Creek basin; Pine Ridge. 
3. Eriogonum chrysocephalum A. Gray. 
Nebraska, according to Rydberg’s Flora of Colorado. 
