Can you identify this phyllanthus tree?
Phyllanthus caroliniensis

Phyllanthus caroliniensis, the Carolina leaf-flower, is a flowering plant native to the Americas, from the southeastern United States1 all the way to Argentina.2 The flowers are small and located where the leaf meets the stem.2

 

Kingdom: Plantae
Subkingdom: Tracheobionta
Superdivision: Spermatophyta
Division: Magnoliophyta
Class: Magnoliopsida – Dicotyledons
Subclass: Rosidae
Order: Euphorbiales
Family: Euphorbiaceae – Spurge family
Genus: Phyllanthus L. – leafflower

Sources:

http://plants.usda.gov/core/profile?symbol=PHCA9
https://en.wikipedia.org/wiki/Phyllanthus_caroliniensis
http://www.easttennesseewildflowers.com/gallery/index.php/Summer-Roadsides-White/Seedleaf50001
http://sura.ots.ac.cr/florula4/find_sp3.php?key_species_code=LS001041&amp;key_kingdom=&amp;key_phylum=&amp;key_class=&amp;key_order=&amp;key_family=&amp;key_genus=&amp;specie_name=caroliniensis