Japanese Cedar or Sugi - Cryptomeria japonica (L. f.) D. Don
Cypress Family:
Cupressaceae ; Hinoki Ka [Japanese], [Chinese]. Formerly placed in: Taxodiaceae
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Japanese Cedar - Cryptomeria japonica
These Japanese Cedars are Morton Arboretum specimens, started from cuttings 25 years ago.

"Japanese Cedar" is a misnomer - this tree is not related to the cedars. It is more properly called "Sugi", as in in Japan, where the tree originated. Sugi is the national tree of Japan, and is commonly incorporated into the landscape of temples and shrines.

Trees monoecious, evergreen, up to 50(-65) m tall and up to 300 cm in diameter, with a conical crown and a straight, slender trunk. Bark reddish brown to dark gray, fibrous, peeling off in strips. Branches ± whorled, horizontally spreading or slightly pendulous; branchlets usually pendulous, those of 1st year green. Shoots green, glabrous. Winter buds small, not scaly.

Leaves persisting 4 or 5 years, needle-like, pale green, spirally arranged in 5 ranks, spreading or directed forward, subulate to linear, ± straight or strongly incurved, adaxial and abaxial surfaces convex, rigid, lateral surfaces slightly flattened, keeled, stomatal bands with 2-8 rows of stomata present on all 4 surfaces, base decurrent, apex acute. Leaves on leader branchlets borne at 15-45° to axis, those on short (fertile) branchlets at 30-55° to axis, length (0.4-)0.7-1.4(-2) cm × 0.8-1.2 mm wide (width measured near base of two wider surfaces).

Pollen cones axillary toward apex of second-year branchlets, usually crowded into a terminal, sessile, oblong raceme of 6-35, ovoid or ovoid-ellipsoid, (2-)2.5-5(-8) × (1.3-)2-3(-4) mm, each cone (except basal and apical) subtended by a leaf shorter than to 1.5 × length of cone. Pollen cones are plum red turning yellow when mature; microsporophylls many, spirally arranged; pollen sacs (3 or)4 or 5(or 6). Seed cones are borne from the fifth year onward. They are borne in groups of 1-6, terminal, solitary or occasionally aggregated, nodding, sessile, globose or subglobose, rosettelike and resembling opening buds, 0.9-1.6(-2.5) × 1-2(-2.5) cm; cone scales 20-30, proximal 2 margins often convex in outline, or all 4 margins ± concave in outline, middle part with or without distinct shoulders at widest point, apex usually recurved, umbo rhombic, distally with 4 or 5(-7) toothlike projections 1-3.5 mm. Cones ripen (color brown) in the first year and persist 1-2 years longer, with branchlet growth often temporarily continuing through cone. Seeds brown or dark brown, 2-5 on each scale, irregularly ellipsoid or multiangular and ± compressed, 4-6.5 × 2-3.5 mm; wings 0.2-0.25 mm wide.  (1)

Japanese Cedar - Cryptomeria japonica
Bark is reddish brown to dark gray, fibrous, peeling off in strips

Sugi can grow very large, indeed, and no one seems to know how old they can grow. The Yaku-sugi of Yakushima Island are probably the largest specimens extant. "Jomon-sugi" is 5.2 meters in diameter and fully 25 meters tall; another is 35 meters tall. It is thought they may be 1,000 years old or more, and that under favorable conditions these trees might reach 2,000. Some have claimed sugi as 7200 years old, but there is no scientific evidence to support this age; it is simply folklore or local exaggeration.

The wood of Japanese Cedar is particularly rot-resistant and easily worked. It is used in buildings, bridges, ships, furniture, utensils and paper manufacture. In Japan, sugi is one of the two most economically important timber species. Outside of China and Japan, the tree is widely planted as a beautiful ornamental tree for landscape or specimen plantings. The Japanese incorporate them into landscapes of temples and shrines. (1)

 

Leaves and Pollen Cones
Leaves and Pollen Cones

Common names:

Economic importance:

  • Environmental: ornamental   (fide Hortus 3; Zander ed14)
  • Materials: essential oils; wood   
    (a very valuable timber F Okin; HerbSpices )
     
    Native:
    • ASIA-TEMPERATE
      Eastern Asia: Japan - Honshu, Kyushu, Shikoku

Synonyms:


 
Kingdom Plantae – Plants
Subkingdom Tracheobionta – Vascular plants
Superdivision Spermatophyta – Seed plants
Division Coniferophyta – Conifers
Class Pinopsida
Order Pinales
Family Cupressaceae – Cypress family
Genus Cryptomeria D. Don – Japanese cedar
Species Cryptomeria japonica – Japanese cedar
Japanese Cedar or Sugi - Cryptomeria japonica
Foliage

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