AutoCad :: Counting Area Of Each Plant

In plantation design, especially for ground covers that spread across an area, I have to distinguish each plant by hatch pattern. so they're hatched(due to the twisting shapes, with oh so much pain), and the problem comes in when counting area of each plant. Mind there are altogether hundreds of hatch objects to be counted and sorted into dozens of plant types.

I had counted on data exporting, but then i find that hundreds of hatches simply don't have the area attribute. not a surprise, since hatching process was already problematic enough with the borders.

So I figured the quickest way would be to identify those without this attribute and try to fix up their borders. but you can't identify them from a data table, not without the handle number. you can't quickselect by absent attributes either. I'm completed at a dead end now.

I know there's the manual way.. but do I really have to spot those hundreds and process their borders one by one?

here's part of the problematic plan: some of the faulty hatch is colored red, but there are many more hidden in plain sight.