Rhododendron dilatatumMiq.

WFO wfo-0000400735 Accepted WFO 2026-06 3 photographs CC BY

Plate 1 figs. a–c · 1 observation

This species has been photographed under an open licence only 1 time, so some figures below are different views of the same plant, taken on the same day, rather than different individuals. They are usually different parts of it: the leaf, the flower, the bark.

Rhododendron dilatatum, photographed by Marco Mussita
fig. a Marco Mussita, CC BY 4.0 / 2021-05-03 / obs. 126598717
Rhododendron dilatatum, photographed by Marco Mussita
fig. b Marco Mussita, CC BY 4.0 / obs. 126598950
Rhododendron dilatatum, photographed by Marco Mussita
fig. c Marco Mussita, CC BY 4.0 / obs. 126598921

Every figure is a research-grade observation under CC0, CC BY or CC BY-SA, rehosted with the photographer’s name, the licence and the observation it came from. Photographs under a NonCommercial licence are excluded from this site and are never stored, which costs us a great many pictures and is not negotiable.

Native range 1 botanical country

Regions where Rhododendron dilatatum is native: Japan Japan
Native distribution of Rhododendron dilatatum, after Kew’s World Checklist of Vascular Plants. Introduced, extinct and doubtful records are excluded, so this is where the plant is from, not everywhere it now grows.
RegionTDWG codeContinent
Japan JAP ASIA-TEMPERATE

Region boundaries approximated from Natural Earth (public domain) and mapped to TDWG World Geographical Scheme for Recording Plant Distributions (WGSRPD) level-3 botanical countries (Brummitt 2001). Indicative, not the official WGSRPD geometry.

Also published as 11 synonyms

A synonym is not an error. It is a record of botanists disagreeing, in print, about where this plant belongs. Each of these was somebody’s considered answer.

  • Azalea dilatata (Miq.) Hook.f.
  • Rhododendron decandrum (Makino) Makino
  • Rhododendron decandrum f. lasiocarpum H.Hara
  • Rhododendron decandrum var. pilosum H.Hara
  • Rhododendron dilatatum f. hypopilosum Sa.Kurata
  • Rhododendron dilatatum f. lasiocarpum (H.Hara) T.Yamaz.
  • Rhododendron dilatatum var. decandrum Makino
  • Rhododendron dilatatum var. lasiocarpum (H.Hara) T.Yamaz.
  • Rhododendron dilatatum var. satsumense T.Yamaz
  • Rhododendron hidakanum H.Hara
  • Rhododendron inobeanum Honda

Sourcesevery claim on this page

  1. World Flora Online Plant List. accepted name, authority, classification. CC0. Retrieved 2026-07-12.
  2. iNaturalist. photographs and flowering annotations, CC0 / CC BY / CC BY-SA only. per photograph. Retrieved 2026-06-27.
  3. Kew, World Checklist of Vascular Plants (WCVP v16). native distribution by TDWG level-3 botanical country, and life form. CC BY 3.0. Retrieved 2026-06-04.

We publish what we can source and we say so when we cannot. This page has no care advice and no toxicity claim, because we do not yet have those from a source we can cite.