This oddity appears to have its flowers borne upon wide leaves. Instead these are phylloclades, flattened stems that taper to a point at both ends; the veination should help you identify it. R. aculeatus is said to be edible, similar to asparagus, and R. hypoglossum is thought to be Caesar’s laurel, according to former UW Botanic Garden’s founding director, David Mabberley. This specimen forms a spreading 18″ high shade-preferring ground-cover in the Witt Winter Garden at the WA Park Arboretum. I’m looking forward to returning to see the bright red fruits.