Description: This member of the rose family is related to the blackberry and has edible berries. The flower is about 35mm in size and the petals were so fragile they were being blown off by the wind. I will taste a berry when they are ripe and report back (if I can ever find the plant again). IRC lists it as rare and having a shrub growth habit but this one was definitely a vine. Sweetbay Natural Area, Palm Beach County, Florida. Date: 23 February 2012, 09:49. Source: Southern dewberry (Rubus trivialis) Uploaded by Jacopo Werther. Author: Bob Peterson from North Palm Beach, Florida, Planet Earth!. Camera location26° 51′ 16.45″ N, 80° 14′ 17.08″ WView all coordinates using: OpenStreetMap 26.854570; -80.238078.