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Ceanothus velutinus - Douglas. ex Hook.

Common Name Snowbrush
Family Rhamnaceae
USDA hardiness 4-8
Known Hazards Snowbrush leaves contain substantial saponins, which are exploited in topical cleansers but make the plant unsuitable for regular internal use. While small amounts of tea have been used traditionally, excessive internal consumption could irritate the gastrointestinal tract and potentially affect red blood cells. As with other Ceanothus, snowbrush should not be considered a safe or desirable food plant; any experimental teas should be dilute, infrequent and approached with caution.
Habitats Moist soils of hills and mountains to 2,600 metres[212]. It often occurs in draws and on the open face of hills, becoming rapidly established on burnt-over mountain slopes[212].
Range Western N. America - British Columbia to Colorado and California.
Edibility Rating    (2 of 5)
Other Uses    (3 of 5)
Weed Potential Yes
Medicinal Rating    (2 of 5)
Care (info)
Fully Hardy Well drained soil Moist Soil Semi-shade Full sun
Ceanothus velutinus Snowbrush


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Ceanothus velutinus Snowbrush

 

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Summary

Snowbrush is a dense, aromatic, evergreen shrub of western montane forests and clearcuts, especially in the Pacific Northwest and northern Rockies, that forms extensive thickets after fire. Its glossy, sticky leaves have been used to make strongly scented teas, and, like other ceanothus, the flowers can be used as a natural soap. However, high saponin levels make it a dubious edible, and it is vastly more important ecologically than nutritionally. It is also one of the clearest examples of nitrogen-fixing Ceanothus, helping to rebuild soil fertility after disturbance.


Physical Characteristics

 icon of manicon of shrub
Ceanothus velutinus is an evergreen Shrub growing to 2 m (6ft) by 2 m (6ft).
See above for USDA hardiness. It is hardy to UK zone 5. It is in leaf all year, in flower from June to July. The species is hermaphrodite (has both male and female organs) and is pollinated by Bees.
It can fix Nitrogen.
Suitable for: light (sandy) and medium (loamy) soils and prefers well-drained soil. Suitable pH: mildly acid, neutral and basic (mildly alkaline) soils. It can grow in semi-shade (light woodland) or no shade. It prefers dry or moist soil.

UK Hardiness Map US Hardiness Map

Synonyms

C. velutinus var. laevigatus Torr. & A.Gray. C. velutinus var. velutinus

Plant Habitats

Woodland Garden Sunny Edge;

Edible Uses

Edible Parts:
Edible Uses: Tea

Edible use is limited to leaf tea in very small quantities, and even that is more “medicinal curiosity” than true food. Fruits and seeds are not used as food and should be avoided due to the expected high saponin content and low nutritional payoff. Snowbrush is best treated as a valuable ecological ally and an external-use plant rather than as a wild vegetable or grain. The leaves are used as a tea substitute[177, 183]. Edible Uses & Rating: Recorded edible use is limited to leaf tea; there is no strong ethnobotanical tradition of eating the fruits or seeds as food, and given the genus-wide chemistry, that is unsurprising. The tea is intensely aromatic and saponin-rich, more suitable as a medicinal or cleansing wash than a beverage. Edible rating is very low: snowbrush is essentially non-food. Taste, Processing & Kitchen Notes: Fresh leaves smell and taste like a composite of balsam, varnish, turpentine, medicinal liniment, and certain “pine-solvent” cleaning products, reflecting the resinous secondary compounds. Teas made from fresh leaves carry these notes and often exhibit a perceptible soapy quality due to saponins. Aged, dried leaves reportedly give a somewhat mellower brew, but it still sits firmly in the “strong medicine” rather than “gentle tea” category. Even dilute infusions will have an unmistakable resinous flavour; stronger infusions can verge on undrinkable for many palates. The leaves foam readily when rubbed in water, which is useful for cleaning skin or hair, but further undercuts their value as a drink. Fruits are small, firm capsules with little flesh and a likely soapy taste if attempted; they are not recommended. Seasonality (Phenology): In many parts of its range, snowbrush is evergreen, retaining foliage through the winter, though harsh conditions can cause some leaf drop. Flowering typically occurs from May through July, depending on latitude, elevation, and post-fire successional stage, with peak flowering in early summer. Capsules mature and harden over late summer. Seedbanks in the soil can remain viable for decades, germinating en masse after fire. Edible Uses & Rating: Recorded edible use is limited to leaf tea; there is no strong ethnobotanical tradition of eating the fruits or seeds as food, and given the genus-wide chemistry, that is unsurprising. The tea is intensely aromatic and saponin-rich, more suitable as a medicinal or cleansing wash than a beverage. Edible rating is very low: snowbrush is essentially non-food [2-3]. Taste, Processing & Kitchen Notes: Fresh leaves smell and taste like a composite of balsam, varnish, turpentine, medicinal liniment and certain “pine-solvent” cleaning products, reflecting the resinous secondary compounds. Teas made from fresh leaves carry these notes, and often a perceptible soapiness due to saponins. Aged, dried leaves reportedly give a somewhat mellower brew, but it still sits firmly in the “strong medicine” rather than “gentle tea” category. Even dilute infusions will have an unmistakable resinous flavour; stronger infusions can verge on undrinkable for many palates. The leaves foam readily when rubbed in water, which is useful for cleaning skin or hair but further undercuts their value as a drink. Fruits are small, firm capsules with little flesh and a likely soapy taste if attempted; they are not recommended [2-3]. Seasonality (Phenology): In many parts of its range snowbrush is evergreen, retaining foliage through the winter, though harsh conditions can cause some leaf drop. Flowering typically occurs from May through July depending on latitude, elevation and post-fire successional stage, with peak flowering in early summer. Capsules mature and harden over late summer. Seedbanks in the soil can remain viable for decades, germinating en masse after fire [2-3]. Look-Alikes & Confusion Risks: Snowbrush can be confused with some other broad-leaved evergreen shrubs in western forests at a distance, but up close the combination of strongly resinous, sticky, glossy leaves and dense white flower clusters in early summer is distinctive. Other ceanothus species with similar leaves and white flowers (e.g., some forms of C. cordulatus or C. sanguineus) may overlap; careful examination of leaf venation, hairiness and capsule details is needed for precise identification. From a safety standpoint, however, all ceanothus carry similar saponin concerns[2-3]. Traditional/Indigenous Use Summary: Various Indigenous groups and settlers have used snowbrush leaves and flowers primarily for non-food purposes: teas, washes and poultices drawing on its saponin and tannin content, and possibly as a mild respiratory or skin remedy in some traditions. Its role as a wildlife browse plant and nitrogen fixer also made it indirectly important by supporting game and forest recovery after fires. Direct use as a staple food is essentially absent from the record. Safety & Cautions (Food Use): Snowbrush leaves contain substantial saponins, which are exploited in topical cleansers but make the plant unsuitable for regular internal use. While small amounts of tea have been used traditionally, excessive internal consumption could irritate the gastrointestinal tract and potentially affect red blood cells. As with other Ceanothus, snowbrush should not be considered a safe or desirable food plant; any experimental teas should be dilute, infrequent and approached with caution.

References   More on Edible Uses

Medicinal Uses

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Analgesic  Antirheumatic  Eczema  Febrifuge  Poultice  Skin

The leaves are febrifuge[257]. An infusion has been used in the treatment of coughs and fevers[257]. A decoction of the leaves and stems has been used both internally and externally in the treatment of dull pains, rheumatism etc[257]. The leaves contain saponins and have been used as a skin wash that is also deodorant and can destroy some parasites[257, K]. The wash is beneficial in treating sores, eczema, nappy rash etc[257].

References   More on Medicinal Uses

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Other Uses

Baby care  Dye  Insecticide  Soap

Various Indigenous groups and settlers have used snowbrush leaves and flowers primarily for non-food purposes: teas, washes and poultices drawing on its saponin and tannin content, and possibly as a mild respiratory or skin remedy in some traditions. Its role as a wildlife browse plant and nitrogen fixer also made it indirectly important by supporting game and forest recovery after fires. A green dye is obtained from the flowers[168]. A poultice of the dried powdered leaves has been used as a baby powder for treating nappy rash etc[257]. Smoke from burning the plant has been used as an insecticide to kill bedbugs[257]. All parts of the plant are rich in saponins - when crushed and mixed with water they produce a good lather which is an effective and gentle soap[168, 169, 212]. This soap is very good at removing dirt, though it does not remove oils very well. This means that when used on the skin it will not remove the natural body oils, but nor will it remove engine oil etc[K] The flowers are a very good source, when used as a body soap they leave behind a pleasant perfume on the skin[K]. The developing seed cases are also a very good source of saponins[K]. Various Indigenous groups and settlers have used snowbrush leaves and flowers primarily for non-food purposes: teas, washes and poultices drawing on its saponin and tannin content, and possibly as a mild respiratory or skin remedy in some traditions. Its role as a wildlife browse plant and nitrogen fixer also made it indirectly important by supporting game and forest recovery after fires. Ecology & Wildlife: Snowbrush is a keystone shrub in many montane ecosystems. The flowers provide abundant nectar and pollen to bees, wasps, butterflies and other insects, and the thickets offer nesting cover and protection for birds and small mammals. Deer and other ungulates browse the evergreen foliage to varying degrees. Critically, snowbrush forms nitrogen-fixing symbioses with Frankia bacteria in root nodules, enabling it to capture atmospheric nitrogen and enrich post-fire soils, often facilitating the eventual recovery of conifers and other long-lived species.

Special Uses

Nitrogen Fixer  Scented Plants

References   More on Other Uses

Cultivation details

Snowbrush is a powerful coloniser of burned and disturbed montane forest landscapes, combining dense evergreen foliage, heavy flowering and strong nitrogen-fixing capability. It is a pillar of post-fire succession in many western ecosystems, vital for soil building and wildlife. Its chemistry, rich in resins and saponins, makes it very useful for soaps and medicinal washes but an unattractive and potentially problematic candidate for human food. Prefers a warm sunny position but tolerates light shade[11, 200]. Tolerates some lime, but will not succeed on shallow chalk[200]. One report says that this species is hardy to zone 5 (tolerating temperatures down to about -20°c)[200] whilst another says that it needs the protection of a wall when grown outdoors in Britain[1]. Plants dislike root disturbance; they should be planted out into their permanent positions whilst still small[182]. Dislikes heavy pruning; it is best not to cut out any wood thicker than a pencil[182]. Plants flower on the previous year's growth; if any pruning is necessary, it is best carried out immediately after flowering has finished[200, 219]. Constant pruning to keep a plant small can shorten its life[200]. Fast growing, it flowers well when young, often in its second year from seed[11]. Hybridizes freely with other members of this genus[200]. The leaves have a strong balsam scent [200]. Some members of this genus have a symbiotic relationship with certain soil micro-organisms, which form nodules on the roots of the plants and fix atmospheric nitrogen. Some of this nitrogen is utilized by the growing plant but some can also be used by other plants growing nearby[200, 212]. Identification & Habit: Snowbrush is an evergreen to semi-evergreen shrub usually 0.5–3 m tall, forming dense, often impenetrable thickets. Stems are upright to arching, with numerous leafy side branches. Leaves are simple, alternate, typically 2–6 cm long, oval to broadly elliptic with entire to finely serrate margins, and a thick, leathery texture. Both leaf surfaces, especially the upper, are covered with a sticky resin that gives a glossy sheen and a strong, balsamic, “varnish-and-medicine” scent when crushed. The common name “velvet buckbrush” reflects the slight velvety feel on some forms, but the stickiness is more conspicuous. In late spring to early summer, the shrub is covered in dense clusters of small, white, strongly fragrant flowers, arranged in terminal or upper-axillary panicles. As with other Ceanothus, flowers have five small, hooded petals and five stamens. Fruits are three-lobed capsules, about 3–4 mm across, each lobe containing a single small seed. Snowbrush is insect-pollinated, drawing large numbers of bees, wasps, flies, and butterflies to its nectar. Identification & Habit: Snowbrush is an evergreen to semi-evergreen shrub usually 0.5–3 m tall, forming dense, often impenetrable thickets. Stems are upright to arching, with numerous leafy side branches. Leaves are simple, alternate, typically 2–6 cm long, oval to broadly elliptic with entire to finely serrate margins, and a thick, leathery texture. Both leaf surfaces, especially the upper, are covered with a sticky resin that gives a glossy sheen and a strong, balsamic, “varnish-and-medicine” scent when crushed. The common name “velvet buckbrush” reflects the slight velvety feel on some forms, but the stickiness is more conspicuous. In late spring to early summer, the shrub is covered in dense clusters of small, white, strongly fragrant flowers, arranged in terminal or upper-axillary panicles. As with other Ceanothus, flowers have five small, hooded petals and five stamens. Fruits are three-lobed capsules, about 3–4 mm across, each lobe containing a single small seed. Snowbrush is insect-pollinated, drawing large numbers of bees, wasps, flies and butterflies to its nectar. Habitat & Range: The species is distributed from British Columbia and Alberta south through Washington, Oregon, Idaho, Montana and into northern California, Nevada and parts of Utah and Colorado, typically in montane conifer forests, clearcuts, burns, roadsides and other disturbed sites from roughly 900–2,700 m elevation. It is especially characteristic of Douglas-fir, lodgepole and mixed conifer zones in the interior West. Size & Landscape Performance: In the field, snowbrush commonly forms dense stands 1–2 m tall and wide per stem, coalescing into large patches that may dominate an area for decades after fire. Individual plants can reach about 3 m tall under ideal conditions. In a designed landscape, where used, it provides dense, evergreen screening, heavy fragrance in bloom and strong wildlife value but can become too vigorous and is rarely used in small or formal gardens. Cultivation (Horticulture): Snowbrush is used more in restoration and forestry contexts than in ornamental horticulture. It thrives in sunny, disturbed, well-drained sites and may struggle in rich, heavily irrigated garden beds. Over-watering and poor drainage encourage root problems. In suitable climates it can be seeded or planted to stabilise slopes and restore nitrogen after logging or fire. Pruning is generally unnecessary; if done, it should be light, as hard pruning into old wood may reduce vigour. Pests & Problems: In natural stands, snowbrush tends to be hardy and resilient, with occasional herbivory by insects and vertebrates but few severe disease issues. In cultivation, badly drained or overly rich sites can predispose plants to root rot and decline. The dense litter of leaves and stems in old stands can accumulate, altering fire behaviour if not periodically burned or decomposed. Pests & Problems: In natural stands, snowbrush tends to be hardy and resilient, with occasional herbivory by insects and vertebrates but few severe disease issues. In cultivation, badly drained or overly rich sites can predispose plants to root rot and decline. The dense litter of leaves and stems in old stands can accumulate, altering fire behaviour if not periodically burned or decomposed. Cultivar/Selection Notes: There are no widely known named cultivars of C. velutinus in horticulture; breeding and selection have focused on showy coastal species. For restoration projects, local wild seed sources are typically preferred.

References   Carbon Farming Information and Carbon Sequestration Information

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Plant Propagation

Seed - best sown as soon as it is ripe in a cold frame. Stored seed should be pre-soaked for 12 hours in warm water and then given 1 - 3 months stratification at 1°c[138, 200]. Germination usually takes place within 1 - 2 months at 20°c[138]. One report says that the seed is best given boiling water treatment, or heated in 4 times its volume of sand at 90 - 120°c for 4 - 5 minutes and then soaked in warm water for 12 hours before sowing it[214]. It then requires a period of chilling below 5°c for up to 84 days before it will germinate[214]. Seeds have considerable longevity, some that have been in the soil for 200 years or more have germinated[214]. The seed is ejected from its capsule with some force when fully ripe, timing the collection of seed can be difficult because unless collected just prior to dehiscence the seed is difficult to extract and rarely germinates satisfactorily[214]. Prick out the seedlings into individual pots as soon as they are large enough to handle. Grow them on in the greenhouse for at least their first winter and plant them out into their permanent positions in late spring or early summer. Cuttings of half-ripe wood, taken at a node[200], July/August in a frame[11]. Cuttings of mature wood of the current year's growth, 7 - 12 cm with a heel, October in a cold frame[78]. The roots are quite brittle and it is best to pot up the callused cuttings in spring, just before the roots break[78]. Good percentage.

Other Names

If available other names are mentioned here

Sticky Laurel, Snowbrush ceanothus, Hooker's ceanothus, Velvet Buckbrush, Tobacco Brush, Ceanothus velutinus var. laevigatus Torr. & A.Gray, Ceanothus velutinus var. velutinus

Native Range

NORTHERN AMERICA: Canada (Alberta, British Columbia), United States (South Dakota, Colorado, Idaho, Montana, Oregon, Washington, Wyoming, California, Nevada (west), Utah)

Weed Potential

Right plant wrong place. We are currently updating this section. Please note that a plant may be invasive in one area but may not in your area so it's worth checking.

Within its native range, snowbrush can be extremely aggressive after fire, forming dense thickets that suppress tree seedlings for some years. From a forestry perspective, this can be undesirable, although ecologically it plays an important successional role. Outside its natural range, it is not widely planted. It has not emerged as a global invasive, so weed potential is primarily a local forestry and range-management issue rather than a horticultural invasion problem.

Conservation Status

IUCN Red List of Threatened Plants Status : Least Concern.

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Growth: S = slow M = medium F = fast. Soil: L = light (sandy) M = medium H = heavy (clay). pH: A = acid N = neutral B = basic (alkaline). Shade: F = full shade S = semi-shade N = no shade. Moisture: D = dry M = Moist We = wet Wa = water.

 

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Author

Douglas. ex Hook.

Botanical References

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Links / References

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Readers comment

   Jun 24 2013 12:00AM

Known in the Pacific Northwest USA as Snowbrush, Tobacco Brush or Varnish-leaf. The sticky leaves of this shrub are very aromatic and were used as pipe tobacco by Oregon pioneers (my grandfather included). Black-tail deer also forage on the leaves of this shrub. Terry L Howes [email protected]

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Subject : Ceanothus velutinus  
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