Mimulus gracilisR.Br.

Mt. Rose monkeyflower

WFO wfo-0000450810 Accepted WFO 2026-06 3 photographs CC BY / CC BY-SA

Plate 1 figs. a–c · 2 observations

This species has been photographed under an open licence only 2 times, 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.

Mimulus gracilis, photographed by gmgoods
fig. a gmgoods, CC BY 4.0 / 2011-11-04 / obs. 75563542
Mimulus gracilis, photographed by Tony Rebelo
fig. b Tony Rebelo, CC BY-SA 4.0 / obs. 15962971
Mimulus gracilis, photographed by Tony Rebelo
fig. c Tony Rebelo, CC BY-SA 4.0 / obs. 15962974

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
The New York Botanical Garden
Accession
5143118
Filed as
Mimulus gracilis R.Br.
Det. by
not recorded on this sheet
Collected
not recorded
Origin
not recorded
The sheet
View the digitised specimen (CC BY 4.0)

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 28 botanical countries

Regions where Mimulus gracilis is native: Angola, Botswana, Cape Provinces, DR Congo, Eswatini, Ethiopia, Free State, Kenya, KwaZulu-Natal, Lesotho, Malawi, Mozambique, Namibia, Nigeria, Northern Provinces, Sudan-South Sudan, Tanzania, Zambia, Zimbabwe, Yemen, Assam, Myanmar, New South Wales, Northern Territory, Queensland, South Australia, Victoria, Western Australia AngolaBotswanaCape ProvincesDR CongoEswatiniEthiopiaFree StateKenyaKwaZulu-NatalLesothoMalawiMozambiqueNamibiaNigeriaNorthern ProvincesSudan-South SudanTanzaniaZambiaZimbabweYemenAssamMyanmarNew South WalesNorthern TerritoryQueenslandSouth AustraliaVictoriaWestern Australia
Native distribution of Mimulus gracilis, 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
Angola ANG AFRICA
Botswana BOT
Cape Provinces CPP
DR Congo ZAI
Eswatini SWZ
Ethiopia ETH
Free State OFS
Kenya KEN
KwaZulu-Natal NAT
Lesotho LES
Malawi MLW
Mozambique MOZ
Namibia NAM
Nigeria NGA
Northern Provinces TVL
Sudan-South Sudan SUD
Tanzania TAN
Zambia ZAM
Zimbabwe ZIM
New South Wales NSW AUSTRALASIA
Northern Territory NTA
Queensland QLD
South Australia SOA
Victoria VIC
Western Australia WAU
Assam ASS ASIA-TROPICAL
Myanmar MYA
Yemen YEM 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.

Where it actually grows measured, from 102 observations

Condition 5th percentile Median 95th percentile
Coldest month, mean daily low 1.8 °C 5.5 °C 12.4 °C
Warmest month, mean daily high 23.4 °C 28.2 °C 38.3 °C
Annual rainfall 263 mm 698 mm 941 mm
Rainfall in the driest quarter 6 mm 28 mm 123 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 102 research-grade observations of Mimulus gracilis 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 2 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.

  • Mimulus angustifolius Hochst. ex A.Rich.
  • Mimulus pusillus Benth.

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 MIAN4. 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.