I would say that's a graft line. So yes, do take off whatever grows below it. It is a little hard to tell which side was the scion =(desired variety) side and which the root stock side but I'm leaning towards that the scion side is what's growing. Do you know what it may have been grafted too, what kind of root stock. If it was trifoliate then you should be fine. It it was a c.shaddock, or a v.lemon or rough lemon it's a little trickier. The leaves look pretty much like a kumquat though, at least what I can see of them. Australian Sheppard or Aussie Cattle Dog? What I can see looks cute!

Also Laura if you are reading... I just went to my back garden area where I have some of of citrus, peppers and figs... do you remember that super tall fig I posted about on the fig forum? As I was approaching I noticed I didn't see the fig... confused, I look around... and realize it is quite windy... and hot... and remember I haven't been back here in a day or so.... and sprint back there to find the fig laying on top of 2 of my citrus!!! It had dried out a bit in the heat and the wind and fell on top of my pink sensation pummelo and australian finger lime... like fully on top. Somehow the citrus were holding it up and there was no damage... today is my lucky day. So yes I guess the fig pot is way too small, as you suggested lol.

I placed my kumquat seeds between to pieces of damp paper towels in a zipper food bag and placed over my heater duct outlet. Others I planted in potting soil wit a lid over the container and placed inside one of my heating ducts. Both ways took about a week. My last set of 80 meiwa seeds all rotted. Meiwa kumquats are very hard to start. Today I ate my last 2 Meiwa kumquats and saved 10 seed to through outside in the 20F snow. I am not wasting any more time sprouting Meiwa seeds. Its a lot of work. Steve

3 out of 4 of my first set of Meiwa seedling produced flower within the firs 1.75 years and all flowered by 2.5 years. 3 out of 4 set fruit with in the firs 2.75 years. 1 set and produced 2 kumquats i 1 yea 8 months and produced another 30 fruit that were picked in 3 years +/- 2 months. Lots of light, heat, and, feed year around should get you fruit in 5 years. 2. 5 years from seed sprout\ sweet lee tangerine tree The other tangerine tree Steve