Hosta Silver Lode United States Hybrid Muhlenbergia sericea is another US

Muhlenbergia sericea is another US native (NC to Texas)

Hedychium 'Stephen' is topped with slender flower heads of fragrant

it does not fit any reasonable criteria of an invasive plant

and the giant tree dahlia is at the top of my list

Hosta Silver Lode United States Hybrid Muhlenbergia sericea is another USThanks to plantsman Roy Klehm for sharing this hosta that he picked up on a visit to Japan. The fast growing, show stopping Hosta 'Fortunei' type plant makes a nice 3' wide clump of medium green leaves, highlighted by a large white center. In late summer, Hosta 'Silver Lode' becomes viridescent (the center pattern turns light green). The vigorous clumps are topped with 30" scapes of light lavender flowers in midsummer.