Three species of echinacea are useful medicinally: Echinacea augustifolia, Echinacea purpurea, and Echinacea pallida
There are two main types of echinacea used in herbal medicine. One is Echinacea angustifolia & the other is Echinacea purpurea. Sometimes you'll also see the name Echinacea pallida, which is another type again.
The scientific or taxonomic name would be Echinacea purpurea.
Roscoea purpurea was created in 1806.
Raphitoma purpurea was created in 1803.
Salvia purpurea was created in 1793.
Dampiera purpurea was created in 1810.
Hemigenia purpurea was created in 1810.
Agonopterix purpurea was created in 1811.
Pheidole purpurea was created in 2009.
Clarkia purpurea was created in 1796.
Aristida purpurea was created in 1835.