Possible Clues:

• Appearance of these weeds exasperates
• Let them be sent around for a sting
• Let them be stinging in the nest
• The stingers are so weedy
• Annoys soldier retreating in tense riot
• Plants you can use to make pesto
• Causes irritation, but agrees with name for first of sons
• Invasive plants with stinging hairs
• Tees off
• Plants observed going up round dry lake