Tripleurospermum inodorum(L.) Sch.Bip.

scentless false mayweed

WFO wfo-0000014118 Accepted WFO 2026-06 8 photographs CC0 / CC BY

Plate 1 figs. a–h · 8 separate observations

Tripleurospermum inodorum, photographed by Anastasia_Surkova
fig. a Anastasia_Surkova, CC BY 4.0 / 2022-06-12 / obs. 205893942
Tripleurospermum inodorum, photographed by Anastasia_Surkova
fig. b Anastasia_Surkova, CC BY 4.0 / obs. 205892344
Tripleurospermum inodorum, photographed by Марина Садыкова
fig. c Марина Садыкова, CC BY 4.0 / obs. 205691741
Tripleurospermum inodorum, photographed by Tatiana Strus
fig. d Tatiana Strus, CC BY 4.0 / obs. 205770292
Tripleurospermum inodorum, photographed by Tatiana Strus
fig. e Tatiana Strus, CC BY 4.0 / obs. 205809327
Tripleurospermum inodorum, photographed by Liubov Ilminska
fig. f Liubov Ilminska, CC0 1.0 / obs. 204965943
Tripleurospermum inodorum, photographed by Сергей Крыленко
fig. g Сергей Крыленко, CC BY 4.0 / obs. 205744091
Tripleurospermum inodorum, photographed by Tatiana Strus
fig. h Tatiana Strus, CC BY 4.0 / obs. 204334997

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 48 botanical countries

Regions where Tripleurospermum inodorum is native: Canary Is., Altay, Buryatiya, Chita, Cyprus, Irkutsk, Kazakhstan, Kirgizstan, Krasnoyarsk, North Caucasus, Tadzhikistan, Transcaucasus, Türkiye, Tuva, Uzbekistan, West Siberia, Xinjiang, Yakutiya, Albania, Austria, Baltic States, Belarus, Belgium, Bulgaria, Central European Russia, Czechia-Slovakia, Denmark, East European Russia, Finland, France, Germany, Greece, Hungary, Italy, Krym, Netherlands, North European Russia, Northwest European Russia, Norway, NW. Balkan Pen., Romania, Sardegna, South European Russia, Spain, Sweden, Switzerland, Türkiye-in-Europe, Ukraine AltayBuryatiyaChitaCyprusIrkutskKazakhstanKirgizstanKrasnoyarskNorth CaucasusTadzhikistanTranscaucasusTürkiyeTuvaUzbekistanWest SiberiaXinjiangYakutiyaAlbaniaAustriaBaltic StatesBelarusBelgiumBulgariaCentral European RussiaCzechia-SlovakiaDenmarkEast European RussiaFinlandFranceGermanyGreeceHungaryItalyKrymNetherlandsNorth European RussiaNorthwest European RussiaNorwayNW. Balkan Pen.RomaniaSouth European RussiaSpainSwedenSwitzerlandTürkiye-in-EuropeUkraine Canary Is.Sardegna
Native distribution of Tripleurospermum inodorum, 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
Albania ALB EUROPE
Austria AUT
Baltic States BLT
Belarus BLR
Belgium BGM
Bulgaria BUL
Central European Russia RUC
Czechia-Slovakia CZE
Denmark DEN
East European Russia RUE
Finland FIN
France FRA
Germany GER
Greece GRC
Hungary HUN
Italy ITA
Krym KRY
Netherlands NET
North European Russia RUN
Northwest European Russia RUW
Norway NOR
NW. Balkan Pen. YUG
Romania ROM
Sardegna SAR
South European Russia RUS
Spain SPA
Sweden SWE
Switzerland SWI
Türkiye-in-Europe TUE
Ukraine UKR
Altay ALT ASIA-TEMPERATE
Buryatiya BRY
Chita CTA
Cyprus CYP
Irkutsk IRK
Kazakhstan KAZ
Kirgizstan KGZ
Krasnoyarsk KRA
North Caucasus NCS
Tadzhikistan TZK
Transcaucasus TCS
Türkiye TUR
Tuva TVA
Uzbekistan UZB
West Siberia WSB
Xinjiang CHX
Yakutiya YAK
Canary Is. CNY AFRICA

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 2,274 in flower of 2,544 examined

Peak flowering in Aug. Each bar is the share of Tripleurospermum inodorum 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. 2,274 of 2,544 examined observations were in flower, every one of them research grade. The whisker on each bar is a 95% Wilson interval. 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.

Where it actually grows measured, from 1,872 observations

Condition 5th percentile Median 95th percentile
Coldest month, mean daily low -20.3 °C -10.9 °C 0.7 °C
Warmest month, mean daily high 19.9 °C 23.1 °C 26.3 °C
Annual rainfall 430 mm 643 mm 971 mm
Rainfall in the driest quarter 47 mm 105 mm 182 mm

It is found where winters are severely cold. This is not care advice and it is not a forecast. It is a measurement: we sampled the climate at every one of the 1,872 research-grade observations of Tripleurospermum inodorum 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. Climate from CHELSA V2.1 (Karger et al. 2017); occurrences from 10.15468/dl.cgje2x.

Also published as 31 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.

  • Camomilla inodora Gilib.
  • Chamaemelum inodorum (L.) Vis.
  • Chamaemelum inodorum var. inodorum
  • Chamomilla inodora (L.) K.Koch
  • Chamomilla praecox K.Koch
  • Chrysanthemum inodorum (L.) L.
  • Chrysanthemum maritimum var. agreste Bech.
  • Chrysanthemum maritimum var. inodorum (L.) Bech.
  • Dibothrospermum agreste Knaf
  • Dibothrospermum pusillum Knaf
  • Matricaria inodora L.
  • Matricaria inodora f. agrestis Fiori & Paol.
  • Matricaria inodora f. biennis Fiori & Paol.
  • Matricaria inodora f. inodora
  • Matricaria inodora var. agrestis Weiss
  • Matricaria inodora var. inodora
  • Matricaria inodora var. pusilla (Knaf) Fiori
  • Matricaria maritima subsp. inodora (L.) Soó
  • Matricaria maritima subsp. inodora (L.) Clapham
  • Matricaria maritima var. agrestis Wilmott ex Fernald
  • Matricaria maritima var. inodora (L.) Soó
  • Matricaria perforata Mérat
  • Matricaria pumila Nyman
  • Pyrethrum elegans Pollini

and 7 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. USDA PLANTS Database. common name, checklist symbol TRPE21. public domain. Retrieved 2026-07-13.
  4. 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.