|A Goldenrod cultivar|
Solidago has over 100 species
Goldenrod or Solidago counts over 100 species, which almost all have yellow flowers. The plant is native to North America. Some American species have been introduced to Europe and North Africa. Solidago canadensis, introduced as a garden plant in Europe, has become a common plant in the wild and is considered an invasive species in Germany.
The many goldenrod species can be difficult to distinguish because most of the have similar bright golden yellow flower heads that blossom in late summer. Some of the species produce abundant nectar and are visited by bees, flies, wasps and butterflies.
The plant contains saponin, tannin and essential oils. The flowering herb is mostly known for use against kidney problems. It is also applied to heal wounds, cramps, inflammation, rheumatism and gout.
Thomas Edison experimented with the plant and made a good quality rubber out of it.