Greasewood, a spiny, evergreen herb of the goosefoot family. Greasewood grows from four to eight feet (1.2 to 2.4 m) high, and has slender, grayish branches. The thick, smooth-edged, bright-green leaves resemble twigs. Small, cream-colored flowers grow in clusters near the bases of the leaves. The roots penetrate deeply into the soil.

Greasewood thrives in the alkaline desert soils of the southwestern United States. Its presence usually indicates an underground supply of freshwater.

Greasewood is Sarcobatus vermiculatus of the family Chenopodiaceae.