This photograph was taken in mid-March last year in Portland's Leach Botanical Garden. For 2013, Wendy Cutler reports that it was already starting to bloom in early January in Vancouver (BC). If you're in the Portland area, I'd guess that it is also blooming there now, since it seems to be an early spring this year (according to the wildflower reports).
A fragrant bloomer like its familial relatives, Daphne spp., Edgeworthia chrysantha's scent is described as "soft, clove-like". However, its perfume is not reflected in its common names: Oriental paperbush or mitsumata. Mitsumata translates to "three forks" or "three-pronged fork", a description of how the plants branch (which you can see via Wendy's photographs in the link above). The Oriental of Oriental paperbush refers to the native distribution of the species in China, while paperbush alludes to its primary economic use. Cultivated extensively in Japan and China for papermaking, this use dates back to approximately 1600 CE (unfortunately, the links to larger images on that site appear to be broken). To learn more about how the bark fibre of Edgeworthia chrysantha is used in papermaking, consult Khartasia (a project of the Centre de Recherche sur la Conservation des Collections): Edgeworthia chrysantha.
Unfortunately, this species is absent from UBC Botanical Garden's collections -- something I'll have to push the Curator of the David C. Lam Asian Garden to rectify.