Herbal Seedling Pictures?

I have asked around, looked around, and still not finding what I need. I have planted herbs in some outside boxes. In a box I planted watercress. Well, there is TONS of plant life in there now... and I dont know if they are the plants or weeds... and I cant find any pics of the seedlings as they are coming out the ground so I can tell what is weed and what is not so that i dont pull out my herbs and make things worse lol... Do you know where I can herbal seedling pics so that I won't pull out my watercress?

Google's image search tool is very handy in instances like this. Try this search:
images.google.ca/images?q=nasturtium+officinale&hl=en&lr=&start=20&sa=N
You will find all sorts of pictures of watercress, including ones of seedlings.