Done, thank you! The name is quite appropriate!

"Pteracantha" is a varietal (or subspecies?) name meaning "Wingthorn." The binomial is Rosa sericea. So this is a wild or near-wild rose of an unusual species. Like all roses, it's a dicot; like all dicots, it's a vascular plant and a covered-seed-bearing plant (angiosperm.) In particular, like most roses, it sets fruit called hips, but can also propagate vegetatively. I'm assuming it does the latter pretty well,
because it's described as bearing "few" hips.

The neato thing about this rose, aside from the ornamental value of the flaring red translucent thorns, is that it's the only rose species whose flowers have four petals rather than five. Since five-petalled flowers are characteristic not only of the rose genus but the rose family (and order? Anyway, plums and apples and strawberries and potentilla) the flowers of this species make some people think of dogwood trees (for which four-petalled bract clusters are characteristic).