Found a at the land mark
Small plant 1 meter tall. Green berries 5mm, white flowers 10mm
Buffalo Bur (Solanum rostratum)
22 May 2016
Ray Roberts Lake State Park - Isle Du Bois
Pilot Point, Denton County, Texas
Buffalo Bur is also known by additional common names like Buffalobur Nightshade, Spiny Nightshade, Colorado Bur, Kansas Thistle, Mexican Thistle and Texas Thistle. Buffalo Bur is native to the US Southwest and Central and Northern Mexico but has spread widely throughout North America and is found across the continent in Canada and United States. We'd not observed it before and were surprised to see it blooming to the side of the trail and next to the Ray Roberts Lake's shoreline. Clearly, this indigenous wildflower that's often considered a weed (and is considered highly toxic) because of its origins in North America is an authentic resident of the Western Hemisphere. Ray Roberts Lake State Park, Isle Du Bois, is administered by the Texas Parks and Wildlife Department.
"Solanum rostratum," Native Plant Database, Lady Bird Johnson Wildflower Center, University of Texas at Austin, photographs, description, resources, accessed 5.27.16, http://www.wildflower.org/plants/result.php?id_plant=SORO
"Solanum rostratum," Wikipedia, photographs, description, bibliography, classification, accessed 5.27.16, https://en.wikipedia.org/wiki/Solanum_rostratum
"Solanum rostratum Dunal - buffalobur nightshade," Plants Database, United States Department of Agriculture, Natural Resources Conservation Service, range map, photographs, description, resources, accessed 5.27.16, http://plants.usda.gov/core/profile?symbol=soro#
Solanum is a large and diverse genus of flowering plants, including two food crops of the highest economic importance, the potato and the tomato. It also contains the nightshades and horsenettles, as well as numerous plants cultivated for their ornamental flowers and fruit.