General: Deciduous shrub, erect, loosely branched, 1.5-3 m tall; bark reddish-brown, turning grey and flaking off in patches; twigs glabrous to hairy.
Leaves: Opposite, short-stalked, widely egg-shaped to rounded, 3-5 cm long, margins entire to toothed, flat with 3 major veins from the leaf base, slightly sand-papery to touch.
Flowers: Inflorescence of 3-15 flowers in a raceme; petals 4, white, 5-20 mm long, oblong; calyces top-shaped or bell-shaped, 4-6 mm long, 4-lobed, the lobes egg-shaped, 5-6 mm long; stamens yellow, numerous, unequal.
Fruits: Capsules, 4-chambered, woody, 1 cm long; seeds many, spindle-shaped, brown, 2.5-3 mm long.
A shade-intolerant. submontane to subalpine, North American deciduous shrub distributed more in the Cordilleran than the Pacific region. Occurs in continental cool temperate and cool semiarid climates on moderately dry to fresh, nitrogen-medium soils; its occurrence increases with increasing temperature and continentality and decreases with increasing elevation. Scattered in open-canopy Douglas-fir forests; in the coast-interior ecotone more frequent on water-shedding sites than water-receiving sites. Characteristic of dry continental forests.
Philadelphus gordonianus Lindl. Philadelphus lewisii subsp. gordonianus (Lindl.) Munz Philadelphus lewisii var. angustifolius (Rydb.) Hu Philadelphus lewisii var. ellipticus Hu Philadelphus lewisii var. gordonianus (Lindl.) Jeps. Philadelphus lewisii var. helleri (Rydb.) Hu Philadelphus lewisii var. intermedius (A. Nelson) Hu Philadelphus lewisii var. oblongifolius Hu Philadelphus lewisii var. parvifolius Hu Philadelphus lewisii var. platyphyllus (Rydb.) Hu
Recommended citation: Author, Date. Page title. In Klinkenberg, Brian. (Editor) 2020. E-Flora BC:
Electronic Atlas of the Plants of British Columbia [eflora.bc.ca]. Lab for
Advanced Spatial Analysis, Department of Geography, University of British
Columbia, Vancouver. [Accessed:
2021-04-12 12:07:01 PM
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