American Silvertop Plant Information

American Silvertop grows in the following 4 states:

Alaska, Oregon, California, Washington

Images of American Silvertop:

Information about American Silvertop:

The following information is licensed as Creative Commons content from Wikipedia and the USDA.
More information about American Silvertop may be found here, or from the US Department of Agriculture.

Glehnia littoralis (in the monotypic genus Glehnia) is a species of plant in the "carrot family", Apiaceae, known by several common names including beach silvertop and American silvertop in English, and bei sha shen (Chinese: -) and shan hu cai (Chinese: -) in Chinese. The genus was named after Russian botanist Peter von Glehn.

It is native to eastern Asia, particularly eastern China, Japan, and far-eastern Russia, and western North America from Alaska to northern California.
It is a long-taprooted plant forming a basal patch of leaves, with each leaf made up of several rounded, lobular segments. It reaches a maximum height exceeding half a meter and its erect stem is topped with an umbel of carrotlike white flowers.
The plant is perhaps best known as a Chinese herbal remedy for cough. It contents naphthisoxazole A:

Other links with information about American Silvertop: