Thuja - Arborvitae . Evergreen Sir Herbert Beerbohm Tree of imposing dimension found angry in North America , China , Korea , and Japan . The several variety are among the most cosmetic evergreens and , as they are hardy , they can be used in most parts of North America where worthy soil atmospheric condition prevail and the ambience is moderately detached from impurities . The leaves are very small and almost scalelike , and they closely overlap on the shoot , render a frondlike arrangement .
In general appearance these trees resemble Chamaecyparis , but the cones are different in shape and the seeds in several instances have big wing . Although there are not many species or wild kinds , there are a very great num ber of horticultural variety of some of these species .
When bruised , the limb of some kinds , particularly T. plicata and T. occidentalis , emit a characteristic odor rather like a mixture of Tansy and Turpentine . Thuja belongs to the Pine family , Pinaceae . Although the spelling Thuya was widely used until a few yr ago , and still is in many position , research has decide that the correct rendering is Thuja , which is a magnetic declination ofThuia , a name used by the Greek assimilator Theophrastus .
Propagation by Seed
Seeds should be used for propagation purposes whenever potential . When large telephone number of tree are required , the seeds may be inseminate in later spring in inclined beds of light grease out of doors as are Pine seed . They should have only a thin natural covering of soil , for the seed are very light , and sowing should take place on a calm day .
pocket-sized quantities of seed may be sow in in pots or flatcar of light dirt placed in a greenhouse or frame ahead of time in February . The young plants should be establish in a greenhouse bottom in May or , if that can not be done , they should be pot singly in small mickle and be plunged ( bury to the rims of their pots ) in a stale frame .
Inserting Cuttings
The numerous varieties of the different kinds can be increased by press clipping of young shoots inserted in a bed of Baroness Dudevant or sand and peat moss in a warm nursery in September or October , or in a similar bed in a cold frame , during August , and leave undisturbed until well - rooted . They can also be increased by grafting them , in a tender greenhouse in wintertime , on stocks of their respective character which have been antecedently established in wad . As a dominion , Tree prove from slip are found more satis factory than those which have been grafted .
Although these Sir Herbert Beerbohm Tree are not very satisfactory when planted on very limy soils ( high pH ) , they boom where a limestone subsoil is covered with a moderately thick layer of non - limy ( noncalcareous ) soil . Otherwise , they succeed in somewhat acrid soils , sandy grunge , and those of a peaty nature , where the climatic conditions are rather moist . They should be planted in lasting spot when moderately lowly , though when by rights snarf , with the roots balled and burlaped ( see Ball ) , specimens 8 - 10 foot . high and even higher can be moved without much peril of personnel casualty or serious harm . The more vigorous variety acquire rapidly once they are shew , and very soon form sufficient growth to screen out un sightly objects when used for that purpose . Planting may be done in mild conditions in early fall or spring . ·
As Hedge Plants
Some of the Thujas conformation good hedging plants and screens . When they are grown as decorative trees very trivial pruning is necessary other than restricting them to a single leader and removing any lower branches that may degenerate as the Sir Herbert Beerbohm Tree age . When develop as hedges they may be shear once or twice a twelvemonth but caution should be taken not to cut back into wood more than one twelvemonth previous .
There are numerous mixed bag of Thujas of the gnome habit of growth which are excellent for rock garden and foundation planting . They develop slowly and keep compact . Several of these are referred to under their several types be low .
Thuja Wood Is Durable
genus Thuja wood is used for construction , cabinetry , and cooperage ; it is favored for purposes where great strength is required when Sir Henry Wood must be exposed to weather condition change . So resistive to decay is the timber of this tree , that instances have been known of trees falling in the wood , seedlings appearing on the fall short pants , rooting into the ground , and grow into specimen indicate 300 to 400 annual rings and eventually being cut down for timber ; the original log remained profound and were cut up and used for shingles .
T. occidentalis , the American Arborvitae , is a aborigine of easterly North America , where it is a wide allot tree , often uprise on wet ground . In a natural province it grows 60 - 70 ft . high , with a trunk of moderate size or some times up to 5 ft . in diameter . The frondlike branchlets are compact and clothed with tiny scalelike farewell , each one carrying a globe shape crude gland on the back . When the foliage are demolish , a strong golden buttons - like smell is given off . The cone shape are little and dark-brown ; as a prescript , fertile germ are receive at the base of two of the scale . There are many varieties . The typical T. occidentalis and some of its varieties turn an un attractive yellowish color in winter .
Golden - leave Varieties . Notable are aurea , Douglasii aurea , lutea , lutescens , semperaurea , and Vervaeneana , all with yellowish or golden foliation ; the last - named turns to a bronze tint in wintertime . Several varieties are secern by their sozzled , pyramidic schema - Buchananii , com pacta , conica , fastigata , filicoides ( in this the sprig are carve up into fine spray ) , River sii , robusta , Rosenthalii and viridis .
Dwarf kindsare Boothii , dumosa , globosa , Hoveyi , nana , pumila ( Little Gem ) , pygmaea , recurva nana and umbraculifera . Varieties with unnatural or odd branch systems are filiformis , Ohlendorfii and pendula . In Ellwan geriana and ericoides the juvenile foliage is maintained throughout life history .
T.orientalis , Oriental Arborvitae . At one time this was placed in the freestanding genus Biota , by reason of its differing from other form in its fleshy cone scales and large seeds . Under natural precondition , it may acquire 50 - 60 foot . high with spread arm . In cultivation , it is commonly see as a summary , shapely tree , with legion vertical subdivision , up to 20 or more foot high . When plant in disclose places there is a defi nite tendency for the branches of quondam trees to be separated by wind , and it may be necessary to tie them together for security measure .
The tree is very variable in character , but the typical form and many varieties can be recognized by the way the secondary branches support out at right angle , or bound - on , to the main branches . The leaves are small , scalelike , and
hopeful green in summer but they may turn to a brown or bronze spook in fall and retain that shade until spring when they regain their original green colour . It is not a very fast growing Sir Herbert Beerbohm Tree and is useful where infinite is limited . There are many varieties , some of them being noteworthy for their productive golden color .
Useful mixture are aurea , a thickset shrub of the globelike outline with golden leafage ; semperaurescens , a low , slow - grow bush with golden leave-taking ; bonita , a slow - grow bush of conelike lineation ; elegantissima , a pyramidical variety with golden leaves in the bounce but the colour may devolve afterward in the year ; Hillieri , a succinct , behind - growing crotch hair with yellow leave of absence in summer , turning light-green in autumn ; minima glauca , a very nanus physique with blue green leaves , suitable for the John Rock garden ; Rose dalis , a dwarf shape with the juvenile character of folio prominent ; flagelliformis , with long , slen der , abnormal branchlet ; meldensis , an erect , minute , heavyset shrub with bluish - immature leaves which are often of the jejune type ; and stricta , a tall plant of minute , fuddled , erect habit .
T. plicata , the Giant Arborvitae , is a very handsome tree diagram , aboriginal to western North America , where it sometimes originate 200 ft . high with a trunk of considerable sizing . It develop rap lazily and its plenteous immature foliage is very attractive . When bruised , the leaves emit a characteristic tansy - like odor . In addition to its time value as a decorative Sir Herbert Beerbohm Tree , it is also planted under timberland conditions . The timbre known as Western Red Cedar is the woodwind of this Sir Herbert Beerbohm Tree .
A number of varieties of T. plicata have been given distinctive names . Good ones are atrovi rens , with dark greenish leave ; aurea or zebrina , with golden and green leaf blend ; fastigiata , of columnar signifier ; Hillieri , a slow - growing , thickly branched anatomy ; and pendula , with slen der , abnormal , pendulous offshoot . T. plicata has also been known as T. gigantea and · T. Lobbii .
T. Standishii , the Japanese Arborvitae , is sometimes call T. japonica . In Japan it maturate up to 50 ft . high . It is a giving tree and well worth planting .
T. koraiensisis the most latterly introduced form . A aboriginal of Korea , it first became known about 1918 . It may work a low spreading shrub , or grow into a small tree , 20 - 25 ft . high . In a young state , it tends to overspread widely at the expense of altitude . The leaves are dark unripened above and silvery beneath .
