Ranzania japonica

Ranzania (Japanese: トガクシソウ) is a monotypic genus of perennial herbs in the family Berberidaceae, the only species is Ranzania japonica. It is native to woodlands in the mountains of Honshu, Japan. This genus is named in honor of Ono Ranzan, who has been called "the Japanese Linnaeus".[1] Fleshy stems of Ranzania form small colonies from an underground rhizome. Each stem bears two trifoliate compound leaves, and between the leaves is a single or more commonly a small cluster of drooping cup-shaped mauve flowers. These develop into an upright clusters of white berries. The haploid chromosome number is n=7.[2]

Ranzania japonica
Ranzania japonica
Scientific classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Order: Ranunculales
Family: Berberidaceae
Genus: Ranzania
T.Ito
Species:
R. japonica
Binomial name
Ranzania japonica
T.Ito
Synonyms

Podophyllum japonicum T. Itô ex Maxim.

Uses

It is occasionally used in shade gardens in the west.[3]

Taxonomy

The taxonomy of this plant has changed a fair amount. It was once places in family Ranzaniaceae Takht. and also combined into genus Podophyllum.

  • Close-up of flowers
  • Ranzania japonica growing in a shade garden.
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References
  1. The Explorer's Garden by Daniel Hinkley , Timber Press, p. 119
  2. The Genus Epimedium and Other Herbaceous Berberidaceae.By William Thomas Stearn, Julian Shaw, Peter Shaw Green, Brian Mathew. Published by Timber Press, 2002 p. 34. ISBN 0-88192-543-8
  3. An Encyclopedia of Shade Perennials by Wolfram George Schmid p. 282 Timber Press


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