What does "american columbo" mean?

Any of genus Frasera of perennial herbs of the gentian family, especially Frasera caroliniensis.

What is a synonym for "american columbo"?

Common synonyms include: american gentian, columbo, deer's-ear, deer's-ears, pyramid plant.

noun

noun ·Rare ·Advanced level

Noun

1
Any of genus Frasera of perennial herbs of the gentian family, especially Frasera caroliniensis. countable, uncountable
2
any of various tall perennial herbs constituting the genus Frasera; widely distributed in warm dry upland areas of California, Oregon, and Washington wordnet