Meanings of Lactuca sativa in английском

Of fifteen pairs of Limnanthes douglasii, and of seven pairs of Lactuca sativa, every single crossed plant was taller than its self-fertilised opponent.

Lactuca sativa (Compositae).-Coveredplants produced some seeds, but the summer was wet and unfavourable.

Lactuca sativa, cultivated Lettice, at 7 and jo.