This is the pungent little dark green pepper found in rings atop nachos and chopped in Mexican sauces--both sweet and hot. Just 31/2 inches long and about 1 1/2 inches wide, these rounded, thick-walled fruits are borne in great numbers on very vigorous 26-inch plants. They are ready to pick when dark green, delivering 4,750 Scovilles of heat. 70-80 day maturity.