Echinacea flowers and capsules. Purple echinacea (Echinacea purpurea) root can be dried, powdered and placed in capsules. It is taken as a herbal medi

---

Echinacea flowers and capsules. Purple echinacea (Echinacea purpurea) root can be dried, powdered and placed in capsules. It is taken as a herbal medicine to boost the immune system.

---

Size: 3378px × 4144px
Photo credit: © SHEILA TERRY/SCIENCE PHOTO LIBRARY / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: -4, -4b, 1944, 20th, 25, adult, aeronautics, air, aircraft, america, american, aviation, base, black--white, caucasian, century, corporation, force, helicopter, historical, history, hns-1, hoverfly, human, igor, january, langley, male, man, mass, mass-produced, mass-production, monochrome, north, people, person, produced, production, rotary, rotary-winged, rotorcraft, sikorskly, sikorsky, states, technological, technology, united, usa, vehicle, virginia, winged, yr-4b