HTML for Wikipedia infoboxes
First of all use one h1 on the page (it's not stated anywhere but it's generally good practice), which means you cannot use in sidebar. I would start with h3 and do subheadings as h4 in your case.

Using aside (http://html5doctor.com/aside-revisited/):
When used in article tag it will be good structure, however when outside of it, it will mean that it's a sidebar(not connected to article itself).

You might as well use figure and fiugurecaption element with images and their caption (it's nice to provide image probably there).

One more thing. If your infobox is separate content why not use article instead of aside? Let's say you are writing text about peanuts. If you want to put that peanuts are produced in kongo  in infobox it qualify as separate content in my opinion.

EDIT:

About wikipedia. Wikipedia is using tables as the data inside is table alike. In your case too. dl doesn't really make sense in this case as it shows that is dictionary definition list, where it actually is table data. It will be better visible when you add for example english name next to latin you will see even more that data is table suitable