Diplotaxis tenuifolia???

The dividing line between taxonomists and botanists is a bit blury. There are a lot of botanists who don't consider themselves as taxonomists but they describe and publish new species or revisions. As long as no one pokes holes in their reasoning it's accepted. Common names are often invented by nurseries/growers who want to give some form of exclusivity to their products for marketing reasons. Many people who buy these 'exclusive' plants will cling to the new names as a matter of pride. However, anyone can change a common name, whether it 'sticks' or not is another matter.

I'm sorry, but w/out a pic that's near impossible. No mention of the plant's growth habit, type or structure of leaves. Simply too little specific detail. Sorry, but you're basically you're asking for mind reading.

Chamaedora metallica.