Lactuca sativa longifolia and Lettuce

Lactuca sativa longifolia noun - Lettuce with long dark-green spoon-shaped leaves.

Lettuce and Lactuca sativa longifolia are semantically related. In some cases you can use "Lettuce" instead a noun phrase "Lactuca sativa longifolia".

Lettuce noun - Any of various plants of the genus Lactuca.

Lactuca sativa longifolia and lettuce are semantically related. Sometimes you can replace phrase "Lactuca sativa longifolia" with "Lettuce", this terms are similar.