Picea koyamae
Common name: 
Koyama's Spruce
Yatsugatake-tohi [Japanese]
Pronunciation: 
PI-see-a KOY-am-ae
Family: 
Pinaceae
Genus: 
Synonyms: 
Picea koyamai
Type: 
Conifer
Native to (or naturalized in) Oregon: 
No
  • Conifer, evergreen, to 60-65 ft (~18-20 m) in its habitat, narrow conical crown, dense, spreading branches, tips ascending.  Needles straight or bowed, very densely arranged, directed upward and forward, 7-12 mm long and about 1.5 mm wide, 4 sided, 2-4 indistinct stomatal lines above, and 5-8 distinct stomatal lines below.  Cones elliptic-ovate, 4-10 cm long, light green at first then glossy brown when ripe.
  • Sun.
  • Hardy to USDA Zone 3          Native to Japan.   Endangered.  Very rare in its habitat, only a few hundred trees on Mt. Yatsuga-take (Yatsugadake Mountains) were it grows in small groves of 10-20 trees or mixed stands on north-facing slopes at 1500-2000 m (~5,000-6,500 ft) elevation.
  • koyamae: in honor of Mitsuo Koyama (1885–-1935), the Japanese botanist who discovered it in 1911.  The name was originally published as "koyamai", but this is an orthographical error (spelling, typo, etc.) and it was corrected under the provisions of the Int. Code of Bot. Nomenclature.
Click image to enlarge
  • plant habit

    plant habit

  • branch

    branch

  • branchlet

    branchlet

  • branchlet

    branchlet

  • needles

    needles

  • immature cone and branchlets

    immature cone and branchlets

  • mature cone and branchlets

    mature cone and branchlets

  • trunk, bark

    trunk, bark