Chamaecyparis lawsoniana2 replies
Hi Dan, I suspect you have a misnamed 'Nova'. Compare with this record: https://conifersociety.org/conifers/chamaecyparis-lawsoniana-nova/
there's a bit of confusion: 'Super Nova', 'Supernova', 'Mini Nova' and 'Nova' all come from the same nursery. Probably all renamings.
I believe it originated at the Hungarian Nursery of Elemer Barabits and found its way to this country. Although Supernova is one word, I believe he split it into two words as 'Super Nova'. It originated before 1980.