This is a unknown cross of flying dragon trifoliate and sweet orange(?).  It was discovered a batch of flying dragon seedlings.  The seedling looked different from the others.  The seeds came from a source in the citrus growing region of south Texas.  The leaves look trifoliate but can also have 1 or 2 petals.  The branches have the wicked looking thorns of a flying dragon trifoliate but are even longer.  This citrus is edible if you are desperate.  I am budding mine to something that tastes better.