Fuente: WIPO "tomato" The disclosure provides seed and plants of the romaine lettuce cultivar designated cv. NNS-2123. The disclosure thus relates to the plants, seeds and tissue cultures of romaine lettuce cv. NNS-2123, and to methods for producing a lettuce plant produced by crossing a plant of romaine lettuce cv. NNS-2123 with itself or with another lettuce plant, such as a plant of another line. The disclosure further relates to seeds and plants produced by such crossing. The disclosure further relates to parts of a plant of romaine lettuce line cv. NNS-2123, including the gametes of such plants.