San Diego County, California, US
The trailing blackberry, an angiosperm is in the family Rosaceae. This species is low to the ground, no more than 6" and has long trailing vines that extend laterally along the ground. Vines are thrones as are the underside of the leaves. Leaves have a velvet texture. Leaves are severely serated, alternate on the vine and pinnately compound in three.
Memorial Park BioBlitz September 2014
Rubus ursinus is a species of blackberry or dewberry known by the common names California blackberry, California dewberry, Douglas berry, Pacific blackberry or Pacific dewberry and trailing blackberry. It is native to western North America. This is a wide, spreading shrub or vine-bearing bush with prickly branches that can tip layer to spread vegetatively. Its white flowers may be distinguished from those of other blackberries by their narrow petals. The species is dioeocious, with male and...