Philadelphus lewisii
Common name: 
Wild Mockorange
Lewis Mockorange
fil-a-DEL-fus lu-IS-e-i
Native to (or naturalized in) Oregon: 
  • Deciduous shrub, 5-10 ft (1.5-3 m), many stemmed, broadly arching.  Leaves opposite, simple, broadly ovate to broadly elliptic, 2-9 cm long, entire to serrate-dentate (i.e., spreading, pointed teeth).  Flowers white, 4(5)-petals, yellow anthers, 4 cm across, 3-11 per cluster, fragrant.  Fruit a 4-cell capsule.
  • Sun to part shade, understory plant, thrives in almost any garden soil, prune after flowering.
  • Hardy to USDA Zone 4      Native range from British Columbia to northern California, to Montana and central Idaho, to 7,000 ft elevation in the Cascades.  It was introduced into Britain by David Douglas in 1825.
  • The State Flower of Idaho
  • There are several available selections of P. lewisii.  One named 'Blizzard' (Blizzard Mockorange) was selected from a seedling population in Beaverlodge, Alberta, Canada, and introduced by the Morden Research Station, Morden, Manitoba in 1994.  The name 'Blizzard' emphasizes the greater hardiness of the plant (hardy to USDA Zone 2B or 3) and the profuse production of larger flowers compared to the species.  The flowers are fragrant and single with 4 petals, but may occasionally produce 5 or 6 petals.  Another selection, 'Goose Creek', has fully double flowers.
  • Oregon State Univ. campus: near the  NW corner of Hovland Hall.
Click image to enlarge
  • plant habit, flowering in native habitat

    plant habit, flowering in native habitat

  • plant habit, flowering

    plant habit, flowering

  • leaves and flower buds

    leaves and flower buds

  • leaf


  • flowering branch

    flowering branch

  • flowering branch

    flowering branch

  • flowers


  • developing fruit

    developing fruit

  • mature fruit and leaves

    mature fruit and leaves

  • plant habit, fall

    plant habit, fall

  • foliage, fall

    foliage, fall

  • leaves, fall

    leaves, fall

  • winter twigs and buds

    winter twigs and buds