Philadelphus lewisii Pursh
mock-orange (Lewis' mock orange)
Hydrangeaceae (Hydrangea family)
Introduction to Vascular Plants
mock-orange (Lewis' mock orange)
Hydrangeaceae (Hydrangea family)
Introduction to Vascular Plants
Species Information
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.
Illustration
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
USDA Species Characteristics
Flower Colour:
White
Blooming Period:
Late Spring
Fruit/Seed characteristics:
Colour: Brown
Present from Summer to Fall
Source: The USDA
Ecology
Ecological Framework for Philadelphus lewisii
The table below shows the species-specific information calculated from
original data (BEC database) provided by the BC Ministry of Forests and Range.
(Updated August, 2013)
The table below shows the species-specific information calculated from
original data (BEC database) provided by the BC Ministry of Forests and Range.
(Updated August, 2013)
| Site Information |
Value / Class |
||
|
Avg |
Min |
Max |
|
| Elevation
(metres) |
640 | 1 | 1540 |
| Slope
Gradient (%) |
39 | 0 | 170 |
|
Aspect (degrees) |
196 | 1 | 360 |
| Soil
Moisture Regime (SMR) [0 - very xeric; 4 - mesic; 8 - hydric] |
2 | 0 | 7 |
| Modal
Nutrient Regime
Class |
C | ||
| #
of field plots species was recorded in: |
415 | ||
| Modal
BEC Zone Class |
IDF | ||
|
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
|
|||
Habitat and Range
Moist to dry talus slopes, shrublands, streamsides and open forests in the lowland, steppe and montane zones; frequent in S BC; E to SW AB and S to MT, ID and N CA.Status Information
Synonyms
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