Please help with plant ID

I have two of these coming up in the garden. There are multiple stems. There have been no flowers yet. I can identify every thing I planted so far and most of my weeds/opportunists. This one has me stumped. It is not the same as my burdock but it has similarities. It may be a bienniel. Any help would be appreciated.

I did a comparison. The leaves are darker green and larger than my patch of burdock but are otherwise the same. It appears to be burdock. I think soil pH, moisture, and sunlight give it a different appearance. In one spot, the soil is alkaline, 7.5, a shade environment and clay soil. The other has improved soil, better drainage, pH of 7.0 to slightly acidic and all day sunshine. The darker green coloration had me fooled.

There are several Burdock species. From Eat the Weeds:

There are at least three species of burdock in North America, all edible and all imports. The most common is the “lesser” Arctium minus. (ARK-ti-um MYE-nus) It grows from knee to shoulder height and is found just about everywhere except Florida. The “great burdock” and the “wooly burdock” are less known. The “great” can grow to nine feet high but usually doesn’t but its flowers are larger than the minus. The “woolly” has “fleece” on its flower heads.

http://www.eattheweeds.com/burdock-banquet/