Woody member of the Ranunculaceae (Clematis, Anemones) form the East Coast woodlands.  Known as Yellow Root, this spreads by underground rhizomes to make a suckering colony of stems which are topped by small purple flowers like a puff of smoke.  Good fall color.

Poor Knight's Lily. Crazy good plant endemic to 3 islands off of New Zealand's North Island where it grows in rocky outcrops. Evergreen sword leaves to 3' with stunning red bottlebrush flowers that are like nothing else. It is frost-sensitive and can take 15 years to flower but if potbound, you can shave some years off.The wait will be completely worth it.