My grandmother gave me this plant. She is a woman that plants everything everywhere :) She told me that this is a mandarin orange tree. Is this really so, and if yes, what is its botanical designation (latin name) and how should I treat it? Thanks.
Well, it certainly looks like a citrus to me. Here's [WIKI]Mandarin orange[/WIKI] on Wikipedia, but I couldn't tell you from looking at this one whether that is it exactly (though it likely is). Care instructions will be similar to other citrus indoors - have a read through the citrus forums.