demand for wildflowers $($their private value$),$ the supply of wildflowers $($the private cost of producing them$),$ and the social value of wildflowers, including both the private value and external benefits.

Use the black point $($plus symbol$)$ to indicate the market equilibrium quantity. Next, use the purple point $($dlamond symbol$)$ to indicate the socially optimal quantity.

$(?)$

QUANTITY OF WILDFLOWERS