The Meyer lemon is thought to be an orange-lemon hybrid that was discovered by the legendary fruit explorer Frank Meyer, and brought to the United States from Beijing China in 1908. If you see a tag that says 'Improved' Meyer lemon, this simply means that it came from a source that was certified to be free of the Tristeza citrus virus. It blooms profusely every year, and is a favorite of the honey bees. Even though small, and in a container, my tree set somewhere around 30 fruit this year, each about the size of a tennis ball. The lemons themselves are very juicy (but with lots of seeds), with an excellent lemon flavor which I prefer to supermarket lemons.