Prefers maritime
climates with cool summers, and mild but wet winters. It can be found at elevations from 610 – 1,798 meters in the
northern Rocky Mountains, 0 – 910 meters in Alaska, 0 – 1,190 meters in British
Columbia, and 0 – 2,290 meters in Oregon.
Local occurrence (where,
how common)
Wet sites such as
wet ravines, along streams and rivers, narrow, poorly drained canyons,
bottomlands, and depressions, and forested swamps.
Moist to wet soils,
shaded forests, bogs.
Plant strategy type/successional stage (stress-tolerator, competitor, weedy/colonizer, seral, late successional)
Very shade tolerant
species. Usually considered a climax
species, but is prevalent in all stages of succession.
(Trees) Populus trichocarpa, Acer macrophyllum, Tsuga heterophylla, Tsuga mertensiana, Picea sitchensis, Pinus monticola, Pinus contorta, Chamaecyparis lawsoniana, Chamaecyparis nootkatensis, Libocedrus decurrens, Pseudotsuga menziesii, Abies grandis, Abies amabilis, Alnus rubra, Arbutus menziesii, Taxus brevifolia, Abies lasiocarpa, Larix occidentalis, Picea engelmannii, Picea glauca, and Pinus ponderosa.
(Shrubs) Amelanchier alnifolia, Menziesia ferruginea,
Rubus parviflora, Holodiscus discolor, Oploponax horridum, Symphoricarpos
albus, Berberis nervosa, Vaccinium ovatum, Rhododendron
macrophyllum, Gaultheria shallon, and Rubus spectabilis.
May be collected as: (seed, layered, divisions, etc.)
Seeds are the most
common type of collection. Rooting of
cuttings also works.
Collection of seeds
should be done in October and November.
Seed germination (needs dormancy breaking?)
Germination
is accomplished without stratification.
Seeds sown on a mineral soil with adequate moisture and shade will
germinate in autumn, winter, and spring.
No or little dormancy.
Seed life (can be stored, short shelf-life, long shelf-life)
Retain viability for
approximately 7 years when stored at adequate moisture and climate conditions.
5-8% moisture
content, 0oF (-18oC)
Propagation recommendations (plant seeds, vegetative parts, cuttings, etc.)
Sow seeds into
medium, being aware of the high mortality rate of seedlings. Plant large quantities of seeds.
Soil or medium requirements (inoculum necessary?)
Mineral soil that
has been disturbed is the best, but undisturbed mineral soil also works. Cuttings should be dipped in 3000ppm
solution for 1 minute.
Installation form (form, potential for successful outcomes, cost)
Sown from seeds, containerized seedlings from nurseries, bare root, cuttings. Containerized seedlings are the most successful, but bare root are cheaper. Seed mortality is very high.
Dense planting with
light thinning until approximately age 25.
Care requirements after installed (water weekly, water once etc.)
Is very important to
keep the soil moist, to keep the roots watered. The roots are very slow to establish.
Very slow growing
tree. Can reach 130 feet tall. Trunk tapers out but the diameter can reach
6+ feet. They can be as old as 800-1000
years old.
1.)
http://www.or.blm.gov/Medford/Wa_rest/rip_plants_gallery/pages/thpl2.htm
2.)
http://www.fs.fed.us/database/feis/plants/tree/thupli/all.html
3.) http://www.na.fs.fed.us/spfo/pubs/silvics_manual/Volume_1/thuja/plicata.htm
4.) Pojar, Jim, Mackinnon, Andy. Plants of the Pacific Northwest Coast. Canada: Lone Pine, 1994.
Kevin Klein; April 10, 2003