Identify the reproductive isolation described here. L. graminifolia and L. canadensis grow together in the wold in southeastern United States. They rarely interbreed int he wild because L. graminifolia flowers in the early spring and L. canadensis flowers in summer.

The correct answer is : temporal isolation.

Explanation:

Temporal isolation is a one type of prezygotic reproductive isolation in which the the prevention of mating of the two species takes place due to the time difference of breeding, this could be day difference, season difference,  or years difference.

Here in this example the reproductive isolation is taking place due to the difference in their mating time, where L. graminifolia flowers in the early spring and L. canadensis in different season of summer.

Thus, the correct answer is : temporal isolation.

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