Ilex rugosa
Cruciform flowers are inconspicuous.
Fruit are large for a holly.[1]
Scientific classification Edit this classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Asterids
Order: Aquifoliales
Family: Aquifoliaceae
Genus: Ilex
Species:
I. rugosa
Binomial name
Ilex rugosa
Synonyms[2]
  • Ilex rugosa var. hondoensis T.Yamaz.
  • Ilex stenophylla Koidz.

Ilex rugosa, the tsuru holly, is a species of flowering plant in the family Aquifoliaceae, native to southern Khabarovsk Krai, Sakhalin, and the Kuril Islands in Russia, and to eight mountain summits in Japan.[2][1] It is usually quite prostrate (growing ever lower with increasing altitude) and does well in areas with protective winter snow cover to prevent damage from late frosts.[1]

Because of its cold-hardiness, Kathleen Meserve crossed it with Ilex aquifolium (common holly) and produced hybrids dubbed the "blue hollies" and later given the scientific name Ilex × meserveae.[3] Two of these hybrid shrubs, sold as clones, have gained the Royal Horticultural Society's Award of Garden Merit.[3] 'Conapri' (trade name Blue Princess) is female.[4] 'Conablu' (trade name Blue Prince) is male and grows a bit taller than 'Conapri', perhaps 2 m (7 ft) at maturity.[5][3]

References

Wikimedia Commons has media related to Ilex rugosa.
  1. 1 2 3 "Ilex rugosa - tsuru holly". mustila.fi. Arboretum Mustila. 2022. Retrieved 1 October 2022.
  2. 1 2 "Ilex rugosa F.Schmidt". Plants of the World Online. Royal Botanic Gardens, Kew. Retrieved 1 October 2022.
  3. 1 2 3 "Ilex rugosa Fr. Schmidt". Trees and Shrubs Online. International Dendrology Society. Retrieved 1 October 2022. 'Blue Angel'
  4. ↑ "Ilex × meserveae Blue Princess ('Conapri') (f) holly [Blue Princess]". The Royal Horticultural Society. 2022. Retrieved 1 October 2022.
  5. ↑ "Ilex × meserveae Blue Prince ('Conablu') (m) blue holly [Blue Prince]". The Royal Horticultural Society. 2022. Retrieved 1 October 2022.


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