Pollia japonica

Plate 1 figs. a–h · 8 separate observations

Pollia japonica, photographed by mami_t_t — fig. b mami_t_t, CC BY 4.0 / obs. 160444576

Pollia japonica, photographed by Timur Kalininsky — fig. c Timur Kalininsky, CC BY 4.0 / obs. 166566933

Pollia japonica, photographed by WATANABE Hitoshi 渡辺仁 — fig. e WATANABE Hitoshi 渡辺仁, CC BY 4.0 / obs. 142406722

Pollia japonica, photographed by りなべる — fig. f りなべる, CC BY 4.0 / obs. 111012550

Pollia japonica, photographed by Marco Mussita — fig. g Marco Mussita, CC BY 4.0 / obs. 84620595

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 7 botanical countries

Native distribution of Pollia japonica, 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.

Region	TDWG code	Continent
China South-Central	CHC	ASIA-TEMPERATE
China Southeast	CHS
Japan	JAP
Korea	KOR
Taiwan	TAI
Cambodia	CBD	ASIA-TROPICAL
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.

Flowering 102 in flower of 192 examined

86%

93%

78%

57%

32%

Proportion of examined Pollia japonica in flower, by month
Month	In flower	Examined	Share	95% interval
Jan	0	4	too few examined
Feb	0	0	too few examined
Mar	0	0	too few examined
Apr	0	2	too few examined
May	3	4	too few examined
Jun	12	14	86%	60% to 96%
Jul	27	29	93%	78% to 98%
Aug	21	27	78%	59% to 89%
Sep	25	44	57%	42% to 70%
Oct	14	44	32%	20% to 47%
Nov	0	20	0%	0% to 16%
Dec	0	4	too few examined

Peak flowering in Jul. Each bar is the share of Pollia japonica observations in which someone actually recorded the reproductive state and found the plant in flower, not the raw number of flowering records. That distinction matters: people observe plants far more in spring than in winter, so a bare count of flowering records partly measures when people go outside. Dividing by the number examined removes that. 102 of 192 examined observations were in flower, every one of them research grade. The whisker on each bar is a 95% Wilson interval. 6 months have fewer than 5 examined observations, so no proportion is drawn for them. This is still a global aggregate and not a forecast for your garden: the same species flowers on different dates in different hemispheres. Where a species has fewer than 30 flowering records we do not draw this chart at all. Computed from 10.15468/dl.cgje2x.

Sourcesevery claim on this page

World Flora Online Plant List. accepted name, authority, classification. CC0. Retrieved 2026-07-12.
iNaturalist. photographs and flowering annotations, CC0 / CC BY / CC BY-SA only. per photograph. Retrieved 2026-06-27.
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.