Home Aquifoliaceae Ilex Ilex crenata (convex-leaved holly, Japanese holly)

Ilex – holly genus

crenata – rounded scallops on leaf margin

Ilex crenata foliage

Native range: Russia, Japan, Korea

Leaves:

  • alternate
  • simple
  • upper blade margin is serrulate (crenate)
  • elliptic or obovate to oblong-lanceolate
  • small (1/2” - 1” long)
  • mostly flat
  • upper surface – dark green
  • lower surface – dotted with translucent or blackish glands; glabrous
  • short petiole

Ilex Crenata5

Flowers:

  • 4 parted
  • solitary female flowers
  • male flowers in 3-7 flowered cyme

flowers

Fruit:

  • globose (round) drupe
  • red to dark colored

Other characteristics:

  • shrub
  • evergreen
  • many branches, making it a good hedge species

Relevant info:

  • ~60 cultivars available in nurseries
  • has become naturalized (i.e., escaped cultivation) in some areas such as Arkansas

Ecology & Adaptations:

  • native to forests, thickets, and mountain slopes in Japan, Korea, China, and eastern Russia (Sakhalin)
  • shade tolerant understory species
  • drought tolerance due to waxy leaf coating (produced by glands) that helps prevent water loss
  • mycorrhiza associated with roots that aid nutrient uptake and enable nutrient deficiency tolerance
  • seed dispersal – animals by eating fruit & excreting seeds