| Gaultheria shallon | |
|---|---|
 | |
| Leaves and flowers | |
Scientific classification  | |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Clade: | Asterids |
| Order: | Ericales |
| Family: | Ericaceae |
| Genus: | Gaultheria |
| Species: | G. shallon |
| Binomial name | |
| Gaultheria shallon | |
 | |
| Distribution in the United States | |
Gaultheria shallon is an evergreen shrub in the heather family (Ericaceae), native to western North America. In English, it is known as salal, shallon, or (mainly in Britain) gaultheria.
Gaultheria shallon is 0.4 to 3.05 metres (1+1⁄2 to 10 feet) tall, sprawling to erect. It is loosely to densely branched and often forms dense, nearly impenetrable thickets. [2] The twigs are reddish-brown, with shredding bark. Twigs can live up to 16 years or more, but bear leaves only the first few years. [2]
The leaves are alternate, evergreen, leathery, thick and egg shaped. They are shiny and dark green on the upper surface, and rough and lighter green on the lower. Each finely and sharply serrate leaf is 5 to 10 centimetres (2 to 4 inches) long. Each leaf generally lives for 2 to 4 years before it is replaced. [2]
The inflorescence of flowers consists of a bracteate raceme, one-sided, with 5–15 flowers at the ends of branches. Each flower is composed of a deeply five-parted, glandular-haired calyx and an urn-shaped pink to white, glandular to hairy, five-lobed petals (corolla), 7 to 10 millimetres (1⁄4 to 3⁄8 in) long.
The fruit is reddish to blue, rough-surfaced, covered in tiny hairs, nearly spherical and 6 to 10 mm in diameter. [3] The fruits are 'pseudoberries', or capsules made up of a fleshy outer calyx, and each fruit contains an average of 126 brown, reticulate seeds approximately 0.1 mm in length.
Lewis and Clark reported the local Chinook Jargon name of the omnipresent evergreen shrub to be shallon, shelwel, or shellwell, [4] but when Scottish naturalist David Douglas arrived at Fort George in April 1825 he noted that it was not called shallon but rather salal or sallal. [5] [6]
The genus Gaultheria was named by Pehr Kalm for his guide in Canada, fellow botanist Jean François Gaultier. [7]
In the Squamish language, the fruits are called t’áḵa7 and the bush is called t’áḵa7áy̓. [8] In the Lushootseed language, the month of August is named pədt̕aqaʔ, literally 'time of the salal.' [9]
Salal is found in Southeast Alaska, British Columbia, Washington and Oregon and along much of the California coast. It grows as far north as Baranof Island, Alaska. [3] Western poison oak is a common associate in the California Coast Ranges. [10]
The species was introduced to Britain in 1828 by David Douglas, who intended the plant to be used as an ornamental. [3] It is believed to have been planted as cover for pheasants on shooting estates. [11]
G. shallon grows in moist to dry, montane to lowland coastal conifer forests as well as forested peatland and swamps throughout the Pacific Northwest down to Southern California. It is a common coniferous forest understory species where shade is not heavy and may dominate large areas with its spreading rhizomes. Individual plants may live for hundreds of years, spreading from their rhizomes. The plant is sensitive to frost. [2]
It is tolerant of salt spray and grows well on stabilized dunes, exposed slopes, and bluffs near the ocean, as well as in coastal brushfields and coastal shore pine and Sitka spruce forests. Salal tolerates moderate shade and does well in sun. [2]
It grows in a variety of soils but prefers moist sandy or peaty soils, and commonly establishes on decaying wood and stumps or as an epiphyte in extremely humid areas. [2]
Conifer regeneration is typically better on sites dominated by salal than on sites dominated by the western swordfern or vine maple, although it still competes with conifer seedlings for water, nutrients, and space. There are mixed reports on its impact on Douglas-fir regrowth; on some sites it may hinder it, but on others it may add nutrients to the soil and actually increase conifer regeneration. [2]
The leaves are browsed by deer and elk, and it is an important winter food for those species. Browsing is heaviest when other low-growing species become covered in snow; in Western Washington salal leaves composed 30.4% of deer diet by volume in January, compared to only 0.5% in June. [12] The leaves have relatively low nutritional value, and deer which feed exclusively on them have shown signs of malnutrition, cementing their status as a winter and emergency food for ungulates. Beavers and the white-footed vole are known to feed on salal leaves, as are domestic goats and sheep in some areas. [2]
The band-tailed pigeon, wrentit, various species of grouse, and numerous songbirds consume the fruit, as do mammals such as the red squirrel, black bear, black-tailed deer, Townsend's chipmunk, and the Douglas squirrel. [2]
Salal flowers are pollinated by hummingbirds, bees, and flies, and are browsed by deer. [2]
It provides important cover and hiding places for a variety of species, from large ungulates to small birds and mammals. [2]
Salal is adapted to a fire regime of infrequent fires, from intervals of 50 to 500+ years. Although aboveground portions of the plant may be consumed, rhizomes in the soil will survive and resprout after light to moderate fires. Severe fires on dry, shallow soil will penetrate into the roots and kill the plant. [2]
It readily colonizes heathland and acidic woodland habitats in southern England, often forming very tall and dense evergreen stands which smother other vegetation. Although heathland managers widely regard it as a problem weed on unmanaged heathland, it is readily browsed by cattle (especially in winter), so where traditional grazing management has been restored, the dense stands become broken up and the plant becomes a more scattered component of the heathland vegetation.
As an invasive species, salal is resistant to many herbicides because of its waxy foliage, although Garlon and Silvex can be effective when properly applied. Attempts at mechanical removal may break up rhizomes and stimulate new growth, thus increasing salal cover. [2]
The dark blue berries and young leaves are edible and efficient appetite suppressants [ according to whom? ], both with a unique flavor. [3] The berries were a significant food resource for some Native American tribes, who ate them fresh and dried [13] them into cakes. They were also used as a sweetener, and the Haida used them to thicken salmon eggs. The leaves of the plant were also sometimes used to flavor fish soup. [3]
More recently, the berries are used locally in jams, preserves, and pies. [3] [14] They are often combined with Oregon-grape because salal's mild sweetness partially masks the former's tartness.
Salal is widely cultivated as an ornamental both within and outside of its native range, useful for ground cover and landscaping. [2]
In the Pacific Northwest, the harvesting of G. shallon is the heart of a large industry which supplies cut evergreens worldwide for use in floral arrangements. It is used in native plant gardens and sold as "Lemon Leaf".
The species has been used for its medicinal properties by local natives for generations, although its medicinal uses are not widely known. The leaves have an astringent effect, making it an effective anti-inflammatory and anti-cramping herb. Leaves prepared in a tea or tincture are thought to decrease internal inflammation (such as bladder inflammation), stomach or duodenal ulcers, heartburn, indigestion, sinus inflammation, diarrhea, moderate fever, inflamed/irritated throat, and menstrual cramps. A poultice of the leaf can be used externally to ease discomfort from insect bites and stings. [15]
The Douglas fir is an evergreen conifer species in the pine family, Pinaceae. It is native to western North America and is also known as Douglas-fir, Douglas spruce, Oregon pine, and Columbian pine. There are three varieties: coast Douglas-fir, Rocky Mountain Douglas-fir and Mexican Douglas-fir.
Devil's club or Devil's walking stick is a large understory shrub native to the rainforests of the Pacific Northwest, but also disjunct on islands in Lake Superior. It is noted for its large palmate leaves and erect, woody stems covered in noxious and irritating spines. It is also known as Alaskan ginseng and similar names, although it is not a true ginseng.
Alnus rubra, the red alder, is a deciduous broadleaf tree native to western North America.
Thuja plicata is a large evergreen coniferous tree in the family Cupressaceae, native to the Pacific Northwest of North America. Its common name is western redcedar in the U.S. or western red cedar in the UK, and it is also called pacific red cedar, giant arborvitae, western arborvitae, just cedar, giant cedar, or shinglewood. It is not a true cedar of the genus Cedrus. T. plicata is the largest species in the genus Thuja, growing up to 70 metres (230 ft) tall and 7 m (23 ft) in diameter. It mostly grows in areas that experience a mild climate with plentiful rainfall, although it is sometimes present in drier areas on sites where water is available year-round, such as wet valley bottoms and mountain streamsides. The species is shade-tolerant and able to establish in forest understories and is thus considered a climax species. It is a very long-lived tree, with some specimens reaching ages of well over 1,000 years.
Arbutus menziesii or Pacific madrone, is a species of broadleaf evergreen tree in the family Ericaceae. It has waxy foliage, a contorted growth habit, and flaky bark.
Toxicodendron diversilobum, commonly named Pacific poison oak or western poison oak, is a woody vine or shrub in the sumac family, Anacardiaceae. It is widely distributed in western North America, inhabiting conifer and mixed broadleaf forests, woodlands, grasslands, and chaparral biomes. Peak flowering occurs in May. Like other members of the genus Toxicodendron, T. diversilobum causes itching and allergic rashes in most people after contact by touch or smoke inhalation. Despite its name, it is not closely related to oaks, nor is it a true tree.
Acer macrophyllum, the bigleaf maple or Oregon maple, is a large deciduous tree in the genus Acer. It is native to western North America. In addition to uses by animals, it is of some culinary and woodworking interest.
Gaultheria procumbens, also called the eastern teaberry, the checkerberry, the boxberry, or the American wintergreen, is a species of Gaultheria native to northeastern North America from Newfoundland west to southeastern Manitoba, and south to Alabama. It is a member of the Ericaceae.
Corylus cornuta, the beaked hazelnut, is a deciduous shrubby hazel with two subspecies found throughout most of North America.
Spiraea douglasii is a species of flowering plant in the rose family native to western North America. Common names include hardhack,hardhack steeplebush, Douglas' spirea, douglasspirea, steeplebush, and rose spirea.
The Northern California coastal forests are a temperate coniferous forests ecoregion of coastal Northern California and southwestern Oregon.
Northern coastal scrub is a scrubland plant community of California and Oregon. It occurs along the Pacific Coast from Point Sur on the Central California coast in Monterey County, California, to southern Oregon. It frequently forms a landscape mosaic with coastal prairie.
California mixed evergreen forest is a plant community found in the mountain ranges of California and southwestern Oregon.
Berberis nervosa, commonly known as dwarf Oregon-grape, Cascade barberry, Cascade Oregon-grape, or dull Oregon-grape, is a flowering plant native to the northwest coast of North America from southern British Columbia south to central California, with an isolated population inland in northern Idaho. It is especially common in second growth, Douglas-fir or western redcedar forests, making use of those pools of sunlight that intermittently reach the ground.
Berberis repens commonly known as creeping mahonia, creeping grape holly, or creeping barberry, is a species of Berberis native to most of the western United States and two western provinces of Canada. It is low growing shrub that spreads by underground stems. As a species it is well adapted to fire and is a very common understory plant in western forests. An evergreen species, it provides food to deer and elk in winter and can make up a significant part of their diet. The berries are eaten by birds and small mammals, aiding it in spreading to recently disturbed areas. It has found use as a xeric ornamental plant and has escaped from cultivation in areas beyond its native range.
Townsend's chipmunk is a species of rodent in the squirrel family, Sciuridae. It lives in the forests of the Pacific Northwest of North America, from extreme southwestern British Columbia through western Washington and western Oregon. Townsend's chipmunk is named after John Kirk Townsend, an early 19th-century ornithologist.
Achlys is a small genus of flowering plants in the barberry family (Berberidaceae), which it shares with genera such as Berberis and Vancouveria. It is named after the Greek legendary figure associated with shade and mist, Achlys, because the plants grow in the shade.
The Klamath Mountains ecoregion of Oregon and California lies inland and north of the Coast Range ecoregion, extending from the Umpqua River in the north to the Sacramento Valley in the south. It encompasses the highly dissected ridges, foothills, and valleys of the Klamath and Siskiyou Mountains. It corresponds to the Level III ecoregion designated by the Environmental Protection Agency and to the Klamath-Siskiyou forests ecoregion designated by the World Wide Fund for Nature.
Kalmiopsis fragrans is a rare species of flowering plant in the heath family known by the common name North Umpqua kalmiopsis. It is endemic to Oregon in the United States, where there are just a few known populations, all within Douglas County.
Pseudotsuga menziesii var. menziesii, commonly known as Coast Douglas-fir, Pacific Douglas-fir, Oregon pine, or Douglas spruce, is an evergreen conifer native to western North America from west-central British Columbia, Canada southward to central California, United States. In Oregon and Washington its range is continuous from the Cascades crest west to the Pacific Coast Ranges and Pacific Ocean. In California, it is found in the Klamath and California Coast Ranges as far south as the Santa Lucia Mountains with a small stand as far south as the Purisima Hills, Santa Barbara County. In the Sierra Nevada it ranges as far south as the Yosemite region. It occurs from near sea level along the coast to 1,800 metres (5,900 ft) in the California Mountains. Further inland, coast Douglas-fir is replaced by Rocky Mountain or interior Douglas-fir. Interior Douglas-fir intergrades with coast Douglas-fir in the Cascades of northern Washington and southern British Columbia.
