Hydrangea viburnoides(Hook.f. & Thomson) Y.De Smet & Granados

WFO wfo-0001344655 Accepted WFO 2026-06 8 photographs CC0 / CC BY

Plate 1 figs. a–h · 8 separate observations

Hydrangea viburnoides, photographed by chiuluan
fig. a chiuluan, CC BY 4.0 / 2022-04-19 / obs. 189203114
Hydrangea viburnoides, photographed by Jacy Chen
fig. b Jacy Chen, CC BY 4.0 / obs. 177511413
Hydrangea viburnoides, photographed by chiuluan
fig. c chiuluan, CC BY 4.0 / obs. 171849327
Hydrangea viburnoides, photographed by Jacy Chen
fig. d Jacy Chen, CC BY 4.0 / obs. 105860572
Hydrangea viburnoides, photographed by Jacy Chen
fig. e Jacy Chen, CC BY 4.0 / obs. 106647033
Hydrangea viburnoides, photographed by Cheng-Tao Lin
fig. f Cheng-Tao Lin, CC BY 4.0 / obs. 26973541
Hydrangea viburnoides, photographed by 呂一起(Lyu yi-chi)
fig. g 呂一起(Lyu yi-chi), CC BY 4.0 / obs. 31619916
Hydrangea viburnoides, photographed by 葉子
fig. h 葉子, CC0 1.0 / obs. 111337834

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.

The specimen a real sheet, in a real collection

Herbarium
Smithsonian, US National Herbarium
Accession
US 1053025
Filed as
Hydrangea viburnoides (Hook.fil. & Thomson) Y.De Smet & C.Granados
Det. by
Strong, Mark T., (BOT), Smithsonian Institution - National Museum of Natural History (UNITED STATES)
Collected
E. Wilson 1918-10-16
Origin
TW
The sheet
View the digitised specimen (CC0 1.0)

A real pressed plant, in a real collection, under the accession number above. Not an illustration of one. The holding institution does not serve this sheet’s image to third parties, so there is no photograph here. The record is real and the link goes to it. Where we hold no openly licensed sheet for a species this section is simply absent, and where a sheet never recorded who determined it, that field stays empty rather than being filled in. Roughly half of all herbarium sheets never recorded a determiner, which is ordinary.

Native range 9 botanical countries

Regions where Hydrangea viburnoides is native: China South-Central, China Southeast, Hainan, Japan, Nansei-shoto, Taiwan, Assam, East Himalaya, Vietnam China South-CentralChina SoutheastHainanJapanTaiwanAssamEast HimalayaVietnam Nansei-shoto
Native distribution of Hydrangea viburnoides, 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. Regions too small to draw at this scale are marked with a dot.
RegionTDWG codeContinent
China South-Central CHC ASIA-TEMPERATE
China Southeast CHS
Hainan CHH
Japan JAP
Nansei-shoto NNS
Taiwan TAI
Assam ASS ASIA-TROPICAL
East Himalaya EHM
Vietnam VIE

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.

Where it actually grows measured, from 760 observations

Condition 5th percentile Median 95th percentile
Coldest month, mean daily low 2.6 °C 8.8 °C 13.2 °C
Warmest month, mean daily high 21.1 °C 26.7 °C 30.0 °C
Annual rainfall 2,841 mm 4,092 mm 4,807 mm
Rainfall in the driest quarter 155 mm 456 mm 836 mm

It is found where winters are cool but frost is light or absent. This is not care advice and it is not a forecast. It is a measurement: we sampled the climate at every one of the 760 research-grade observations of Hydrangea viburnoides that carry a coordinate, and this is the range those places actually span. The 5th and 95th percentiles are used rather than the minimum and maximum, because a single cultivated specimen in a heated conservatory should not widen a tropical plant's range to the Arctic.

This is not a hardiness zone. A USDA zone is the average annual extreme minimum temperature. The figure above is the mean daily minimum of the coldest month, which is a different quantity and is typically far warmer. Reading one as the other would place a plant several zones too warm, so we do not publish a hardiness zone, because we do not have one.

Also published as 9 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.

  • Philadelphus viburnoides var. parviflora Oliv. ex Maxim.
  • Pileostegia subansiriana H.B.Naithani & Bennet
  • Pileostegia tomentella var. glabrescens C.C.Yang
  • Pileostegia urceolata Hayata
  • Pileostegia viburnoides Hook.f. & Thomson
  • Pileostegia viburnoides var. glabrescens (C.C.Yang) S.M.Hwang
  • Pileostegia viburnoides var. parviflora Oliv. ex Maxim.
  • Pileostegia viburnoides var. viburnoides
  • Schizophragma viburnoides (Hook.f. & Thomson) Stapf

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.