I grow two different species of Skunk Cabbage. The yellow L. americanus, Western skunk Cabbage and the white L. camtschatcensis, Asian Skunk Cabbage. The latter is the smaller of the pair.
I planted two different clones of Western Skunk Cabbage and they self sow all over my bog. The Asian version have I had only a short time but I hope this one will self sow too. Maybe I get hybrids as the two are known to hybridise.
In summer the leaves of L. americanus grow huge - 1m or more.