GREASEWOOD
greasewood, black greasewood, Sarcobatus vermiculatus
(noun) low hardy much-branched spiny shrub common in alkaline soils of western America
Source: WordNet® 3.1
Etymology
Noun
greasewood (countable and uncountable, plural greasewoods)
Spiny shrubs containing oil, of the genus Sarcobatus, native to the United States, especially Sarcobatus vermiculatus.
Any of several other North American desert shrubs with glossy or resinous leaves
Adenostoma fasciculatum (chamise).
Baccharis sarothroides (desert broom)
Glossopetalon spinescens (spiny greasewood, Nevada greasewood).
Gutierrezia (snakeweeds, matchweed).
Larrea tridentata (creosote bush).
Source: Wiktionary