Deciduous shrub, erect, loosely branched, 1.5-3 m tall; bark reddish-brown, turning grey and flaking off in patches; twigs glabrous to hairy.
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.
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.
Capsules, 4-chambered, woody, 1 cm long; seeds many, spindle-shaped, brown, 2.5-3 mm long.
If more than one illustration is available for a species (e.g., separate illustrations were provided for two subspecies) then links to the separate images will be provided below. Note that individual subspecies or varietal illustrations are not always available.
Illustration Source: The Illustrated Flora of British Columbia
Present from Summer to Fall
Source: The USDA
||Value / Class
Moisture Regime (SMR)
[0 - very xeric; 4 - mesic;
8 - hydric]
of field plots
species was recorded in:
BEC Zone Class
All BEC Zones (# of stations/zone) species was recorded in
|BG(18), CDF(29), ESSF(1), ICH(123), IDF(156), MS(4), PP(73)|
Source: Klinkenberg 2013
Synonyms and Alternate Names:
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