![](http://www.alamy.com/thumbs/6/5650AB1E-BC80-460A-BAA0-2E5AC0D5327D/MR6709.jpg)
Wood or woodland horsetail, Equisetum sylvaticum. Horsetails are used as biochemical indicators for gold.
Size: 3744px × 5616px
Photo credit: © Henri Koskinen / Alamy / Afripics
License: Royalty Free
Model Released: No
Keywords: biochemical, edible, equisetum, fertile, finland, gold, herb, horsetail, indicator, medicinal, nature, nonflowering, plant, scouring-rush, spore, spore-bearing, spores, spring, stem, sylvaticum, traditional, undisturbed, wild, wood, woodland