Flowers Yellow

Stems with spines
Tall shrub; 12 to 20 feet high	Honey mesquite
Lower shrub; 2 to 6 feet high
Stems covered with white wool	Cotton-thorn
Stems not woolly
Spines straight; flowers showy	Desert senna
Spines curved; flowers tiny in clusters	Catclaw
Stems without spines
Leaf margin prickly
Leaves large and succulent; more than 4 inches long	Desert agave
Leaves not succulent	Desert barberry
Leaf margin not prickly
Flowers more than 3/4 inch across
Leaves narrow	Interior goldenbush
Leaves with an oval shape
Leaves gray;up to 1 and 1/2 inches long	Brittle bush
Leaves green; 3/8 to 1 inch long	Desert sunflower
Flowers smaller than 3/4 inch across
Shrub blooming in late summer	Rabbitbrush
Shrub blooming in spring
Leaves green; balsam odor if crushed	Pygmy-cedar
Leaves gray; without odor	Black bush