WOOTON AND STANDLEY — FLOEA OF NEW MEXICO. 199 



Stems not jointed; leaves never ecalelike, mostly broad 

 and flat. 

 Flowers moncecious or dioecious. 



Pericarp and plant densely hairy 5. Eurotia (p. 201). 



Pericarp not hairy; plant more or less scurfy.. 6. Atriplex (p. 201). 

 Flowers perfect. 



Fruit dorsally flattened (narrowly winged), ex- 



serted from the calyx 7. Corispermum (p. 205). 



Fruit not dorsally flattened, inclosed in the 

 calyx. 

 Fruiting calyx transversely winged . 



Flowers paniculate; leaves broad, flat, 



toothed 8. Cycloloma (p. 206~). 



Flowers axillary; leaves terete 12. Kochia (p. 209). 



Fruiting calyx not winged. 



Sepals and stamens each 1 9. Monolepis (p. 20C). 



Sepals 3 to 5 ; stamens 1 to 5. 



FruitLug calyx fleshy, reddish; 



plants glabrous 10. Blitum (p. 206). 



Fruiting calyx herbaceous, green- 

 ish; plants mostly mealy 

 or scurfy 11. Chenopodium (p. 206). 



1. SARCOBATXJS Nees. Greasewood. 



A divaricately branched shrub with linear fleshy leaves; staminate flowers naked, 

 in aments; pistillate flowers with a saccate calyx adherent at the 2-lipped apex to the 

 base of the stigmas; calyx laterally margined with an erect 2-lobed border, this finally 

 becoming a broad membranous wing. 



1. Sarcobatus venniciilatus (Hook.) Torr. in Emory, Mil. Reconn. 149. 1848. 



Batis f vermiculatus Hook. Fl. Bor. Amer. 2: 128. 1838. 



Fremontia vermicularis Torr. in Fr^m. Rep. Exped. Rocky Mount. 95. pi. 3. 1845. 



Type locality: "Common on the barren grounds of the Columbia, and particu- 

 larly near salt marshes." 



Range: Washington to Montana, Arizona, and New Mexico. 



New Mexico: Carrizo Mountains; San Juan Valley; Gallup; Zuni; Puertecito; 

 Patterson. Alkaline soil, in the Upper Sonoran Zone. 



This shrub grows to be 2 to 3 meters high, though the commoner form is lower, 

 probably as a result of browsing. The leaves are bright green, terete, and succulent; 

 the young branches are pale yellowish white and rigidly divaricate, the shorter branch- 

 lets thomlike. Also known as "chico" or "chico bush." 



2. SALSOLA L. 



Annual herb, densely branched, with rigid awl-shaped leaves; flowers perfect, 

 with 2 bractlets; calyx 5-parted, the segments finally horizontally winged on the 

 back; stamens usually 5; styles 2; flowers sessile, axillary. 



1. Salsola pestifer A. Nels. in Coulter, New Man. Rocky Mount. 169. 1909. 



Russian thistle. 



Salsola tragus of American authors, not L. 



Type locality: Not stated. 



Range : Widely introduced as a weed in North America; a native of the Old World. 



New Mexico: Common at lower altitudes throughout the State. 



One of the commonest introduced weeds on waste lands, along roadsides, and to 

 Bome extent in fields on the open range. In some places it covers cultivated fields 



