Isodon umbrosus(Maxim.) H.Hara

WFO wfo-0000217990 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.

Isodon umbrosus, photographed by Marco Mussita
fig. a Marco Mussita, CC BY 4.0 / 2019-09-15 / obs. 52467646
Isodon umbrosus, photographed by Marco Mussita
fig. b Marco Mussita, CC BY 4.0 / obs. 52468114
Isodon umbrosus, photographed by Marco Mussita
fig. c Marco Mussita, CC BY 4.0 / obs. 52468655

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 Isodon umbrosus is native: Japan Japan
Native distribution of Isodon umbrosus, 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 38 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.

  • Amethystanthus excisinflexus Nakai
  • Amethystanthus excisus var. hakusanensis (Matsum. & Kudô) Nakai
  • Amethystanthus excisus var. leucanthus Murata
  • Amethystanthus umbrosus (Maxim.) Nakai
  • Isodon excisinflexus (Nakai) Honda
  • Isodon excisus var. hakusanensis (Matsum. & Kudô) Kudô
  • Isodon inflexus var. umbrosus (Maxim.) Kudô
  • Isodon kameba Okuyama ex Ohwi
  • Isodon kameba f. albescens Okuyama
  • Isodon kameba f. komaensis Okuyama
  • Isodon umbrosus f. albescens Okuyama ex K.Asano
  • Isodon umbrosus f. albiflorus Tuyama
  • Isodon umbrosus f. albiflorus K.Asano
  • Isodon umbrosus f. kameba (Okuyama ex Ohwi) K.Asano
  • Isodon umbrosus f. lilacinus Asai
  • Isodon umbrosus var. excisinflexus (Nakai) K.Asano
  • Isodon umbrosus var. hakusanensis (Matsum. & Kudô) K.Asano
  • Isodon umbrosus var. komaensis (Okuyama) K.Asano
  • Isodon umbrosus var. latifolius Okuyama
  • Isodon umbrosus var. leucanthus (Murata) K.Asano
  • Plectranthus excisus var. hakusanensis Matsum. & Kudô
  • Plectranthus inflexus var. umbrosus Maxim.
  • Plectranthus kameba (Okuyama ex Ohwi) Ohwi
  • Plectranthus kameba var. excisinflexus (Nakai) Ohwi

and 14 more.

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.