The original variety (i.e. the automatically named V. o. var. ovalifolium) is found on both the eastern and western sides of the Pacific Ocean. In North America, it is distributed throughout Canada (Alberta, British Columbia, Newfoundland, Nova Scotia, southern Ontario, southeast Quebec, and southern Yukon) and the United States (southern Alaska, Idaho, northern Michigan, Oregon, western South Dakota, and Washington). In Asia, it is distributed throughout Russia (Kamchatka, the southern Kuril Islands, Primorsky Krai, and Sakhalin) and Japan (Hokkaido and central and northern Honshu).
