Not-so-mellow yellow.

1. Purple pricklypear (Opuntia macrocentra).

2. Lesser goldfinch (Spinus psaltria).

3. Foothills palo verde (Parkinsonia microphylla).

4. Yellow columbine (Aquilegia chrysantha).

At the Desert Botanical Garden, Phoenix, Arizona. Please click any photo in the set to enlarge. 

Not-so-mellow yellow.

1. Purple pricklypear (Opuntia macrocentra).

2. Lesser goldfinch (Spinus psaltria).

3. Foothills palo verde (Parkinsonia microphylla).

4. Yellow columbine (Aquilegia chrysantha).

At the Desert Botanical Garden, Phoenix, Arizona. Please click any photo in the set to enlarge.