The plant in the 2nd photo might be Phyllanthus urinaria, if the location is in the continental USA. Any plant that you wish to have identified should be shown in close-up photos. Good luck with your project! Aloha, Dave http://en.wikipedia.org/wiki/Phyllanthus_urinaria http://www.freshfromflorida.com/Divisions-Offices/Plant-Industry/Plant-Industry-Publications/Weed-of-the-Month/August-2010-Phyllanthus-Urinaria-L.-The-Chamber-Bitter-Or-Gripe-Weed