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You are here >1Up Info > Wildlife, Animals, and Plants > Plant Species > Shrub > Species: Philadelphus lewisii | Lewis' Mockorange
 

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BOTANICAL AND ECOLOGICAL CHARACTERISTICS

SPECIES: Philadelphus lewisii | Lewis' Mockorange
GENERAL BOTANICAL CHARACTERISTICS : Lewis' mockorange is a native, deciduous, erect to spreading shrub that grows 3 to 10 feet (1-3 m) tall. The showy flowers occur in clusters of three to fifteen. The fruit is a four-chambered capsule about 0.24 to 0.39 inch (0.6-1 cm) long [34]. Seeds are about 0.08 inch (0.2 cm) long. Lewis' mockorange is extremely variable in both vegetative and floral characteristics [39]. RAUNKIAER LIFE FORM : Phanerophyte REGENERATION PROCESSES : Lewis' mockorange reproduces vegetatively and by seed. Seeds accumulate in the seedbank. Sparsely distributed viable seeds were collected from the top 2 inches (5 cm) of soil in forested sites in central Idaho [19] Stratification of Lewis' mockorange increases germination. Seeds stratified for 8 weeks at 41 degrees Fahrenheit (5 deg C) then placed in a sand medium at 72 to 79 degrees Fahrenheit (22-26 deg C) had 64 percent germination. The germination rate was less than 10 percent for seeds stratified less than 8 weeks [39]. Germination was 52 percent when stored at room temperature for 3 years and 39 percent when stored at 40 degrees Fahrenheit (4 deg C) [28]. Germination was low when seeds were fully exposed to light or kept in complete darkness [39]. Fruit development was adversely affected by drought in northern Idaho. Fruit partially developed, turned brown, and opened, but no viable seed was produced [8]. Lewis' mockorange sprouts from the root crown [10]. SITE CHARACTERISTICS : Lewis' mockorange occurs on well-drained, moist sites [46]. It grows on deep, rich alluvial loams to rocky or gravelly loams [43]. Lewis' mockorange is commonly found on rocky sites, at the base of talus slopes and cliffs, along streams, and in seasonally moist draws [6,15]. It is found at talus margins in the Columbia River Basin [11]. It occurs at seeps, springs, and rocky wet areas in the Crooked River National Grasslands in central Oregon [16]. Lewis' mockorange occurs from sea level up to 7,000 feet (2,100 m) in the Cascade Range [15,43]. Philadelphus lewisii ssp. californicus grows from 1,000 to 5,000 feet (300-1,500 m) elevation on rocky slopes and in canyons in the Sierra Nevada [36]. Lewis' mockorange grows best on northern and eastern exposures [43]. SUCCESSIONAL STATUS : Lewis' mockorange is tolerant of moderate shade [43]. It is an early to mid-seral species [38] and is often present in seral shrub communities following logging and burning [48]. Although normally scattered at low densities [43], it sometimes occurs in dense, localized stands [17]. SEASONAL DEVELOPMENT : Flowering of Lewis' mockorange occurs from May through July. Fruit matures in late summer and seeds are dispersed in September or October [39]. The following dates are general ranges drawn from several studies in northern Idaho. Specific times for several years are reported [8,33]. Development Date of Occurrence bud burst early April leaf out late April to early May leaf growth late April to mid-May stem elongation early May to late May flower bloom late June to July fruit development begins in July leaf fall late September to late November

Related categories for Species: Philadelphus lewisii | Lewis' Mockorange

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Information Courtesy: U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station, Fire Sciences Laboratory. Fire Effects Information System

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