I am sorry for this delayed reply to your gardening question. We are transitioning to a new Q&A system and your question was unfortunately lost in the transition. I have discovered it now and hope this reply is not too late to be of help.
Regarding your mystery shrub it may be a type of Natal Plum as leaf form varies quite a bit between varieties. The other characteristics of your shrub point to this identification but not conclusively. I suggest you take a sample from the plant to your County Extension Office to see if they can identify it. You may also be able to e-mail them a digital photo.
Thanks for the question. Please stop in again soon!
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