Howellia aquatilis NatureServe Explorer Species Reports — NatureServe Explorer is a source for authoritative conservation information on more than 50,000 plants, animals and ecological communtities of the U.S and Canada. NatureServe Explorer provides in-depth information on rare and endangered species, but includes common plants and animals too. NatureServe Explorer is a product of NatureServe in collaboration with the Natural Heritage Network.
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The water howellia is found in large area of the Pacific Northwest region of the United States. It can be found in California, Idaho, Montana, and Washington, and it is known historically from Oregon.
The plant grows in wetland habitat surrounded by forests, which provide organic material. Associated tree species include Populus trichocarpa (California poplar), P. tremuloides (quaking aspen), and Fraxinus latifolia (Oregon ash). The water bodies are located in glacial potholes, river oxbows, ephemeral ponds, flood plains and other areas that fill with water periodically as snow melts and spring rain falls
