Could you tell us more about this?
That plant you've posted a picture of has some ornamental value, but nothing other than that I think.
Out of the better known DMT-containing plants, closest I can think of (with a big stretch of imagination) would be either phalaris grass or arundo dorax, but just due to their vaguely similar leaf shape. Also consider that some species of plants have such a low % of DMT that extraction always revolves around the main 3 or 4 species for said convenience.
Check out erowid's DMT vault for a list of plants and tons of other info.