This is one of the lemons. Please also note the bug on the leaf below and to the right of the lemon. I see several of these but am not sure what they are. This is my first experience with caring for any type of citrus. From what I understand they do not hold up to even light frost and should be kept potted and moved inside for the winter. We got this one from my sister-in-law. It did not produce much of anything before she gave it to me, but thanks to some tips from one of my clients it is doing nice and has 8 lemons on it. For other citrus keepers in my area here is some information on diseases and helping to stop the spread http://www.saveourcitrus.org/ Backyard growers in this area should keep their fruit at home and inspect trees/bushes often for signs of disease.