echinacea purpurea herb. purple flowers and leaves. aurvedic and medical immunostimulant plant. hand drawn outline

art ayurvedic background big bloom blooming blossom botanical botany chamomile color colorful coneflower daisy draw drawing drawn echinacea extract flora floral flower garden grass green hand health herb herbal illustration immunostimulant isolated leaf leaves line meadow medical medicine organic outline pink plant purple purpurea red sketch stem tea vector white