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Thuja Plicata

Taxonomy and Name

Thuja plicata shoot with mature cones

The western red cedar is not actually a cedar (Cedrus), but belongs in the Cupressaceae family, along with cypresses. It is known by many names, Pacific red cedar, British Columbia cedar, canoe cedar, giant cedar, or just red cedar. Plicata, the species name, derives from a Greek word meaning "folded in plaits", a references to the pattern of its small leaves. It is one of two arborvitaes (Thuja) native to North America. Arborvitae comes from the Latin for "tree of life". Coincidentally, native Americans of the West coast also address the cedar as "long life maker".

Description

The western red cedar is a large tree, ranging between 40 to 150 feet (12 to 45 meters) tall and up to 22 feet (7 meters) in trunk diameter. Trees growing in the open will exhibit a crown that reaches the ground, whereas trees densely spaced together will only exhibit a crown at the top, where light can reach the leaves. Some individuals can live nearly a thousand years, if not more. Certain specimens on Queen Charlotte islands are around nine hundred years old.

Quinault Lake Red Cedar, aka "the Hobbit Tree", is the largest Western red cedar in the world

The Quinault Lake Red Cedar is the largest known western red cedar in the world with a wood volume of 500 cubic metres (17,700 cu ft). By way of comparison, the largest known tree, a Giant Sequoia named General Sherman, has a volume of 1,480 cubic metres (52,300 cu ft). Located near the northwest shore of Lake Quinault north of Aberdeen, Washington, about 34 km from the Pacific Ocean, the Quinault Lake Red Cedar is 55m high with a diameter of 6.04 m (Van Pelt, 2002). A red cedar over 74m tall and 800 years old stood in Cathedral Grove on Vancouver Island, British Columbia, before it was set on fire and destroyed by vandals in 1972.[citation needed]

The foliage forms flat sprays with scale-like leaves in opposite pairs, with successive pairs at 90 to each other. The foliage sprays are green above, and green marked white with stomatal bands below. The cones are slender, 1520 mm long and 45 mm broad, with 8-12 thin, overlapping scales.

Thujaplicin, a chemical substance, is found in mature trees and serves as a sort of natural fungicide, thereby preventing the wood from rotting. This effect lasts around a century even after the tree is fallen. However, thujaplicin is only found in older trees, and saplings that do not produce the chemical will often rot at an early stage, causing some trees to grow with a somewhat hollow, rotten trunk.

Distribution and habitat

The western red cedar is native to the northwestern United States and southwestern Canada, from southern Alaska and British Columbia south to northwest California and inland to western Montana. Pollen analysis and carbon-14 dating seems to indicate that the tree first grew around the lower Fraser Valley around 6600 years ago. There it prospers and accounted for nearly half the vegetation in the area 500 years ago. Currently, western red cedar comprises about twenty percent of the region's flora.

Western red cedar is among the most widespread trees in the Pacific Northwest, and is associated with Douglas-fir and western hemlock in most places where it grows. It is found at the elevation range of sea level to 1370m above sea level. In addition to growing in lush forests and mountainsides, western red cedar is also a riparian tree, and grows in many forested swamps and streambanks in its range. The tree is shade-tolerant, and able to reproduce under dense shade. It has a tight, straight grain and few knots.

Uses

Canadian Western red cedar cowl in the National Assembly for Wales

The soft red-brown timber is valued for its distinct appearance, aroma, and its high natural resistance to decay, being extensively used for outdoor construction in the form of posts, decking, shingles and siding. It is cultivated as an ornamental tree, to a limited extent in forestry plantations and for screens and hedges. It has been introduced to other temperate zones, including western Europe, Australia (at least as far north as Sydney), New Zealand, the eastern United States and higher elevations of Hawaii. It is also used to line closets and chests, for its pungent aromatic oils are believed to discourage moth and carpet beetle larvae, which can damage cloth by eating wool and similar fibres. This is more effective in a properly constructed red cedar chest (sometimes made entirely of cedar), since the oils are confined by shellac and leather seals. A well-sealed red cedar chest will retain its pungent odour for many decades, sometimes for over a century. Its light weight, strength and dark warm sound make it a popular choice for guitar soundboards.

Role in indigenous societies

Western red cedar has an extensive history of use by the indigenous peoples of the Pacific Northwest Coast, from Oregon to southeast Alaska. Some northwest coast tribes refer to themselves as "people of the red cedar" because of their extensive dependence on the tree for basic materials. The cedar wood has been used for constructing housing, totem poles, and crafted into many objects, including masks, utensils, boxes, boards, instruments, canoes, vessels, and ceremonial objects. Roots and bark were used for baskets, ropes, clothing, blankets and rings.

Largest

As of 2009, the three largest known western red cedar are:

Quinalt Lake Cedar (Quinalt Lake Rain Forest-Olympic National Park) 17,650 Cubic feet

Cheewhat Lake Cedar (West Coast Vancouver Island-Pacific Rim National Park) 15,870 Cubic feet

Nolan Creek Cedar (Nolan Creek) 15,330 Cubic feet

History

A huge number of archeological finds point to the continuous use of red cedar wood in native societies. Woodworking tools dating between 50008000 years ago, such as carved antlers, were discovered in shell middens at the Glenrose site, near Vancouver. In Yuquot, on the west coast of Vancouver, tools dating 30004000 years old have been found. The Musqueam site, also near Vancouver, yielded bark baskets woven in five different styles, along with ropes and ships dated to 3000 years ago. At Pitt River, adzes and baskets were dated around 2900 years ago. 1000 year old wooden artifacts were unearthed on the east coast of Vancouver Island.

A legend amongst the Coast Salish peoples describes the origins of the western red cedar. In this legend, there was a generous man who gave the people whatever they needed. When the Great Spirit saw this, he declared that when the generous man died, a great red cedar tree will grow where he is buried, and that the cedar will be useful to all the people; providing its roots for baskets, bark for clothing, and wood for shelter.

Tools

The wood was worked primarily with the adze, which was preferred over all other tools, even ones introduced by European settlers. Alexander Walker, an ensign on the fur trade ship Captain Cook reported that the indigenous peoples used an elbow adze, which they valued over new tools brought by the Europeans, such as the saw or the axe, going so far as to modify traded tools back into an adze. Tools were generally made from stone, bone, obsidian, or a harder wood such as hemlock. A variety of hand mauls, wedges, chisels and knives were used. Excavations done at Ozette in Washington state turned up iron tools nearly 800 years old, far before European contact. When James Cook passed the area, he observed that almost all tools were made of iron. There has been speculation on the origin of these iron tools, some theories include shipwrecks from East Asia, or possible contact with iron-using cultures from Siberia, as hinted in the more advanced woodworking found in northern tribes such as the Tlingit.

Wood

Harvesting red cedars required some ceremony, and included propitiation of the tree's spirits as well as those of the surrounding trees. In particular, many people specifically requested the tree and its brethren not to fall or drop heavy branches on the harvester, a situation which is mentioned in a number of different stories of people who were not sufficiently careful. Some professional loggers of Native American descent have mentioned that they offer quiet or silent propitiations to trees which they fell, following in this tradition.

Felling of large trees such as red cedar before the introduction of steel tools was a complex and time-consuming art. Typically the bark was removed around the base of the tree above the buttresses, and then some amount of cutting and splitting with stone adzes and mauls would be done, creating a wide triangular cut. The area above and below the cut would be covered with a mixture of wet moss and clay as a firebreak, and then the cut would be packed with tinder and small kindling and slowly burned. The process of cutting and burning would alternate until the tree was mostly penetrated through, and then careful tending of the fire would fell the tree in the best direction for handling. This process could take many days, and constant rotation of workers was involved to keep the fires burning through night and day, often in a remote and forbidding location.

A pole outside a six-post house at the University of British Columbia

Once the tree was felled the work had only just begun, as it then had to be stripped and dragged down to shore. If the tree was to become canoes then it would often be divided into sections and worked into rough canoe shapes before transport, but if it were to be used for a totem pole or building materials it would be towed in the round to the village. Many trees are still felled in this traditional manner for use as totem poles and canoes, particularly by artists who feel that using modern tools is detrimental to the traditional spirit of the art. Non-traditionalists simply buy redcedar logs or lumber at mills or lumber yards, a practice that is commonly followed by most working in smaller sizes such as for masks and staves.

Because felling required such an extraordinary amount of work, if only planks for housing were needed, these would be split from the living tree. The bark was stripped and saved, and two cuts were made at the ends of the planking. Then wedges would be pounded in along the sides and the planks slowly split off the side of the tree. Trees which have been so harvested are still visible in some places in the rainforest, with obvious chunks taken off of their sides. Such trees usually continue to grow perfectly well, since red cedar wood is resistant to decay. Planks are straightened by a variety of methods, including weighing them down with stones, lashing them together with rope, or forcing them between a line of stakes.

Red cedar wood is used to make huge monoxyla canoes in which the men went out to high sea to harpoon whales and conduct trade. One of those canoes (a 38 feet craft dug out about a century ago), was bought in 1901 by Captain John Voss, an adventurer. He gave her the name of Tilikum (boat) ("Friend" in Chinook jargon), rigged her, and led her in a three years hectic voyage from British Columbia to London.

Red cedar branches are very flexible and have good tensile strength. They were stripped and used as strong cords for fishing line, rope cores, twine, and other purposes where bark cord was not strong enough or might fray. Both the branches and bark rope have been replaced by modern fiber and nylon cordage among the aboriginal northwest coast peoples, though the bark is still in use for the other purposes mentioned above.

Bark

Illustration of women pulling bark from a tree, from Indian Legends of Vancouver Island by Alfred Carmichael

The bark is easily removed from live trees in long strips, and is harvested for use in making mats, rope and cordage, basketry, rain hats, clothing, and other soft goods. The harvesting of bark must be done with care because if the tree is completely stripped it will die. To prevent this, the harvester usually only harvests from trees which have not been stripped before. After harvesting the tree is not used for bark again, although it may later be felled for wood. Stripping bark is usually started with a series of cuts at the base of the tree above any buttresses, and the bark is peeled upwards. To remove bark high up, a pair of platforms strung on rope around the tree are used, and the harvester climbs by alternating between them for support. Since red cedars lose their lower branches as all tall trees do in the rainforest, the harvester may climb 10 m or more into the tree by this method. The harvested bark is folded and carried in backpacks. It can be stored for quite some time as mold does not grow on it, and is moistened before unfolding and working. It is then split lengthwise into the required width and woven or twisted into shape. Bark harvesting was mostly done by women, despite the danger of climbing 10 m in the air, because they were the primary makers of bark goods. Today bark rope making is a lost art in many communities, although it is still practiced for decoration or art in a few places. Other uses of bark are still common for artistic or practical purposes.

Notes

^ a b c d e Stewart (1984), p. 22

^ a b Stewart (1984), p. 24

^ a b c d e f Stewart (1984), p. 26

^ Stewart (1984), p. 21

^ a b Stewart (1984), pp. 17-19

^ a b c Stewart (1984), p. 27

^ a b c d Stewart (1984), p. 36

^ Stewart (1984), p. 39

^ a b Stewart (1984), pp. 37-38

^ Stewart (1984), p. 40

^ Stewart (1984), p. 42

^ Stewart (1984), p. 43

^ Stewart (1984), p. 116

^ Stewart (1984), p. 115

^ Stewart (1984), p. 113

References

Stewart, Hilary. (1984). Cedar: tree of life to the Northwest Coast Indians. Vancouver: Douglas & McIntyre. ISBN 0-88894-437-3.

Van Pelt, R. (2001). Forest Giants of the Pacific Coast. University of Washington Press. ISBN 0-295-98140-7.

External links

Wikimedia Commons has media related to: Thuja plicata

Conifer Specialist Group (1998). Thuja plicata. 2006. IUCN Red List of Threatened Species. IUCN 2006. www.iucnredlist.org. Retrieved on 12 May 2006.

Gymnosperm Database - Thuja plicata

USDA Plants Profile: Thuja plicata

Categories: IUCN Red List least concern species | Thuja | Trees of the Northwestern United States | Trees of Alaska | Trees of British Columbia | Trees of California | Trees of Oregon | Building materials | Trees of Idaho | Trees of Washington (U.S. state) | Trees of mild maritime climate | Provincial symbols of British Columbia | Least concern plantsHidden categories: All articles with unsourced statements | Articles with unsourced statements from July 2007
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