Taken near Washington DC USA
CANON EOS 450D
Description: This perennial plant has woody stems and can assume the form of a shrub or climbing vine. In the form of a shrub it is about 3-6’ tall, while as a climbing vine it gets up to 10’ tall if there is other vegetation nearby to cling to. The terete hairless stems are heavily armed with stout curved thorns. They are initially green, but eventually turn brown and woody. The alternate compound leaves are odd pinnate with 5-9 leaflets (a few upper leaves may have 3 leaflets). The leaflets are up to 2½" long and ¾" across. They are medium to dark green, hairless, ovate to obovate, and serrated along their margins. At the base of the petiole of each compound leaf, there is a pair of stipules with abundant slender teeth; these teeth have a bristly appearance. This is a distinctive characteristic of Multiflora Rose.
There is significant disagreement over the number of true rose species. Some species are so similar that they could easily be considered variations of a single species, while other species show enough variation that they could easily be considered to be different species. Lists of rose species usually show between 100 and 150 with most botanists agreeing that the actual number is probably nearer the lower end of that range.