1. In a sturdy glass, combine watermelon, jalapeño, smoked salt, honey and mint leaves.
2. With a muddler or handle of wooden spoon, mash the mixture to release flavors.
3. In a shaker filled with ice, combine watermelon mixture, tequila, lime juice and hibiscus flowers and shake well until frosty.
4. Using a fine mesh sieve or strainer, pour slowly into a tall iced tea glass.
5. Garnish with a fresh sprig of mint, a cube of watermelon and a thin slice of lime.