Family: Cupressaceae
Burlington, Ontario, Canada
Plant is Native to: northeastern North America. Hardy in zones 3 to 7 (not vigorous in south).
Plant Height at maturity: 40 to 60 feet tall by 10 to 15 feet spread; in cultivation, more likely to be 20 to 30 feet tall.
Plant Habit and Form: A scale-leafed evergreen, with a dense, conical shape. Medium growth rate. Usually has a single trunk, but may have multiple trunks. Branches end in flat, spreading, horizontal sprays.
Foliage: Leaves are small, scale-like, about 1/12" long, abruptly pointed; Scale-like leaves overlap, forming a rope-like appearance. Leaves on the main axis are glandular (have a small resinous gland on the back); bright green above, pale green below; emits tansy-like odor when bruised. Branchlets are layered in a horizontal fashion.
Burlington, Ontario, Canada
Bark: Grayish brown on the surface to reddish brown in the furrows; Furrows are in narrow strips. Fairly ornamental on older trees, when visible.
Flower: Monoecious. Born on the branch tips. Not ornamentally significant.
Fruit/Seed: Cones, oblong, light brown, about 1/3 to ½ " long. Have 8 to 10 scales, usually only 4 are fertile. Not particularly noticeable.
Burlington, Ontario, CanadaGrowing Requirements: Easily transplanted from pot or balled and burlapped. Requires deep, well-drained soil; full sun. Tolerates pruning, acid or alkaline soils, and wet, marshy soils but is susceptible to strong wind, snow or ice damage; also tolerates considerable heat and drought.
Problems and Drawbacks: Bagworm, heart rot, leaf miner, spider mites, foliar burn and deer browsing.
Special Uses: Hedges, screens, windbreaks; smaller cultivars useful for foundation planting. Also, select cultivars with green winter foliage for best show.
ID Tips/Remarks: Conical shape, horizontal branches on single trunk usually, but may have multiple. Scale-like leaves, tansy odor when crushed. Small, woody cone.
Bibliography:
http://www.hort.uconn.edu/Plants/t/thuocc/thuocc1.html
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