Eupatorium shastensis Taylor & Stebbins Ageratina shastensis is a species of snakeroot which is endemic to Shasta County, California.

[3][4][5] Ageratina shastensis is a woody perennial which bears unassuming fluffy white flowers about a centimeter wide.

It is an uncommon plant which grows in the cracks of limestone cliffs of the Mount Shasta, part of the Cascade Range.

[6] Ageratina is derived from Greek meaning 'un-aging', in reference to the flowers keeping their color for a long time.

This name was used by Dioscorides for a number of different plants.