Stewartia koreana
Common name: 
Korean Stewartia
stu-AR-ti-a kor-e-A-na
Stewartia pseudocamellia var. koreana
Native to (or naturalized in) Oregon: 
  • Broadleaf deciduous tree, may grow to 20-30 ft (6-9 m) tall, upright, dense, often multi-branched low; bark exfoliates in flakes, color varies from gray to orange and reddish browns.  Leaves alternate, simple, elliptic, 2.5-10 cm long and 2-7.5 cm wide, abruptly pointed (acuminate), base wedge-shaped or rounded, remotely serrate, dark green and without hairs (glabrous) above, slightly pubescent below; fall color might include purple, red, orange and yellow, but reportedly some trees show little color.  Flowers white, about 6-7.5 cm wide, 5-6 petals, large yellow center (yellow stamens), similar to S. pseudocamellia; but flatter rather than cup-shaped; blooms in early to mid-summer.  Fruit brown, pointed, pyramidal capsule, about 4-5 cm long, splits to release seeds, persistent.
  • Sun to part shade.  Best in moist, acidic soil.
  • Hardy to USDA Zone 5.   Native to Korea; introduced in 1917 by E. H. Wilson.
  • Taxonomy: Sometimes Stewartia koreana is listed as variety (var.) of S. pseudocamellia, hence Stewartia pseudocamellia var. koreana (World Flora Plant List), or Stewartia ptero-petiolata var. koreana (RHS Dictionary of Hort.), or Stewartia pseudocamellia 'Korean Splendor'.  See Dirr (2009, p.1088) for his views on this.
  • koreana: of Korea.
Click image to enlarge
  • plant habit, flowering

    plant habit, flowering

  • leaves, flower bud

    leaves, flower bud

  • opening flower bud and flower

    opening flower bud and flower

  • flowers and leaves

    flowers and leaves

  • stem, leaves, stipules

    stem, leaves, stipules

  • plant habit and leaves, fall

    plant habit and leaves, fall

  • fruit, fall

    fruit, fall

  • trunk, bark

    trunk, bark