Rubus pensilvanicus
Encyclopedia
Rubus pensilvanicus, known commonly as Pennsylvania Blackberry, is a prickly
bramble
native to eastern North America
. The canes are green at first but then turning dark red, usually ridged, with copious straight prickles. The leaves are compound, usually bearing 5 or 7 leaflets. The flowers are white with large petals, borne in mid-spring. The fruits are large aggregates of black drupelets, somewhat sweet and often used for jams and jellies.
Thorns, spines, and prickles
In botanical morphology, thorns, spines, and prickles are hard structures with sharp, or at least pointed, ends. In spite of this common feature, they differ in their growth and development on the plant; they are modified versions of different plant organs, stems, stipules, leaf veins, or hairs...
bramble
Bramble
Brambles are thorny plants of the genus Rubus, in the rose family . Bramble fruit is the fruit of any such plant, including the blackberry and raspberry. The word comes from Germanic *bram-bezi, whence also German Brombeere , Dutch Braam and French framboise...
native to eastern North America
North America
North America is a continent wholly within the Northern Hemisphere and almost wholly within the Western Hemisphere. It is also considered a northern subcontinent of the Americas...
. The canes are green at first but then turning dark red, usually ridged, with copious straight prickles. The leaves are compound, usually bearing 5 or 7 leaflets. The flowers are white with large petals, borne in mid-spring. The fruits are large aggregates of black drupelets, somewhat sweet and often used for jams and jellies.