The Meyer Lemon is a hybrid between a true lemon and a mandarin orange. It is a cold and frost tolerant variety, but it also does well in hot tropical conditions.
 
Taste: Less acidic and sweeter in flavor than a true lemon, the skin is thin.
Tree size: Dwarf (8 - 10 ft tall)
Seeds per fruit: 10
Season: Year-round, heavier fruiting during fall and winter.
Zones: 8 - 11