In the southeastern U.S., two species of wild
lettuce (Lactuca) do not usually form hybrids
because they bloom during different seasons.
The means of isolation appears to be
1. ecological.
2. geographical.
3. mechanical.
4. behavioral.
5. temporal.
lettuce (Lactuca) do not usually form hybrids
because they bloom during different seasons.
The means of isolation appears to be
1. ecological.
2. geographical.
3. mechanical.
4. behavioral.
5. temporal.