Vanilla Leaf, Deer Foot or Sweet After Death, Achlys triphylla (Sm.) DC.,  a western forest ground cover prevalent throughout the Cascades, Olympics and Coastal range.  Saanich tribe used the dried leafs in Big Houses and homes to repel insects, especially flies and mosquitoes. The dried leaves have a sweet vanilla like scent.  Leaves, whole plant used in decoction to wash down furniture and floors to repel insects including lice, bedbugs.  (More)

Note: Leaf has three, roundly toothed fan shaped leaflets.  More as an edible wild plant.
Food: Spotty evidence pioneers used the leaf to flavor foods, cakes, bread batters with a vanilla like flavoring.  Plant contains coumarins which thin blood (anticoagulant) and may make the use of Achlys risky.

Medicine: Whole aerial part of plant from ground up typically used. Lummi near Bellingham, Washington and Skagit tribe south of Bellingham used decoction of leaves to wash hair, cleansing insecticidal (lice).  Cowlitz used leaf infusion (tea) to treat tuberculosis.  Roots:  Paiute used dried shredded roots as an eye wash to treat cataracts. 

Closely related California variety is called, Achlys californica.

Big House, Sointula Island, B.C., Canada.  Deer Foot was used as an insecticide to cleanse floors, furniture and walls.