A unique, sweet romaine with excellent bolt tolerance. Medium-size, compact romaine is very upright with improved summer performance. Dark green heads have thick leaves with more crunch and sweetness. The plants are harvestable at an earlier stage with a good shelf life-matures 1-2 weeks before other romaines. Use as heads, hearts, sandwich leaves, or "taco boat" wraps. Days to maturity: 45. LACTUCA sativa 'Chalupa'