Piper's Mock Orange

Philadelphus confusus Piper, Bull. Torrey Club 29: 225. 1902
A deciduous shrub, 2-4 m. high, with ascending branches ; bark of the young twigs light-brown or yellowish, glabrous, and of the previous season^s growth gray or yellow, with cross-cracks but scarcely exfoliating ; buds enclosed in the bases of the petioles ; petioles 5-8 mm. long; leaf -blades ovate or lance-ovate, acute at both ends, sparingly denticulate, very thin, glabrous or slightly hairy on the veins, light-green, 2-6 cm. long; flowering branches 7-15 cm. long, with 1-3 pairs of leaves and 5-9 racemose odorous flowers; hypanthium glabrous ; sepals broadly ovate, acute, glabrous without, tomentulose on the margin within ; petals white, elliptic or oval, about 15 mm. long ; stamens numerous ; styles united for at least two-thirds their length; stigmas broadly clavate, slightly narrower than the anthers; capsule broadly obovoid, 7-8 mm. long and almost as thick.
Type locality: Turn Turn Mountains, Washington. Distribution : Cascade Mountains of Washin^on.