Related Clues:

• Flowering desert plant
• Joshua tree, e.g
• Thorny desert plant
• Prickly sort of college plays a part over uncertainty from the start
• Plant seen in Road Runner cartoons
• Spanish dagger or Adam's needle is a variety of it
• Poker in a western?
• Work inside cold American plant
• Southwest desert plant
• Plant of arid regions
• Desert plant in the asparagus family
• Critical over dismissing lists of duties in plant
• Gross-sounding plant?
• Spiky plant with white bell-shaped flowers, native to hot dry parts of North America
• What has spikes of interest?