In a covered 10 inch skillet cook asparagus in a small amount of boiling lightly salted water for 2 to 3 minutes or until crisp-tender. Drain and plunge into ice water. Drain again: pat dry with paper towels.
In a bowl combine cream cheese, lemon peel, lemon juice, and cayenne pepper. Fold in salmon. Spread on tortillas. Arrange one-fourth of the spinach over salmon mixture on each tortilla. Then to one end of each tortilla arrange 3 asparagus spears, and one-fourth of the pepper stips on top of the salmon mixture and spinach leaves.
Roll tortillas startin from the edge with the filling. Wrap in plastic wrap. Serve immediately or chill for up to 4 hours.