it MIGHT be e. crenulata or MAYBE a hybrid of that species with something else (like e. parvula). without flowers and/or fruits it's often difficult to make (relatively) accurate i.d.'s for a "good" species even without the chance of hybridization to further muddy the waters!!!. hopefully someone else may be able to help you better OR you may just have to continue enjoying the plant without knowing the name for sure
