Braya humilis(C.A.Mey.) B.L.Rob.

low northern-rockcress

WFO wfo-0000571942 Accepted WFO 2026-06 8 photographs CC BY

Plate 1 figs. a–h · 7 observations

This species has been photographed under an open licence only 7 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.

Braya humilis, photographed by Юлия
fig. a Юлия, CC BY 4.0 / 2021-05-22 / obs. 130701304
Braya humilis, photographed by Юлия
fig. b Юлия, CC BY 4.0 / obs. 152710500
Braya humilis, photographed by Юлия
fig. c Юлия, CC BY 4.0 / obs. 152710473
Braya humilis, photographed by Евгений Егорейченков
fig. d Евгений Егорейченков, CC BY 4.0 / obs. 190835791
Braya humilis, photographed by Caleb Catto
fig. e Caleb Catto, CC BY 4.0 / obs. 39837538
Braya humilis, photographed by Юлия
fig. f Юлия, CC BY 4.0 / obs. 135221291
Braya humilis, photographed by Юлия
fig. g Юлия, CC BY 4.0 / obs. 134495887
Braya humilis, photographed by Юлия
fig. h Юлия, CC BY 4.0 / obs. 135936800

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
02201008
Filed as
Braya humilis (C.A.Mey.) B.L.Rob.
Det. by
H. W. Rickett 1932-01-01
Collected
I. S. Onion 1860
Origin
CA
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 43 botanical countries

Regions where Braya humilis is native: Afghanistan, Altay, Buryatiya, China North-Central, China South-Central, China Southeast, Chita, Inner Mongolia, Irkutsk, Kazakhstan, Khabarovsk, Kirgizstan, Korea, Krasnoyarsk, Magadan, Mongolia, Primorye, Qinghai, Tadzhikistan, Tibet, Tuva, Xinjiang, Yakutiya, East Himalaya, Nepal, Pakistan, West Himalaya, Alaska, Alberta, British Columbia, Colorado, Greenland, Manitoba, Michigan, Montana, Newfoundland, Northwest Territories, Nunavut, Ontario, Québec, Vermont, Wyoming, Yukon AfghanistanAltayBuryatiyaChina North-CentralChina South-CentralChina SoutheastChitaInner MongoliaIrkutskKazakhstanKhabarovskKirgizstanKrasnoyarskMagadanMongoliaPrimoryeQinghaiTadzhikistanTibetTuvaXinjiangYakutiyaEast HimalayaNepalPakistanWest HimalayaAlaskaAlbertaBritish ColumbiaColoradoGreenlandManitobaMichiganMontanaNewfoundlandNorthwest TerritoriesNunavutOntarioQuébecVermontWyomingYukon Korea
Native distribution of Braya humilis, 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
Afghanistan AFG ASIA-TEMPERATE
Altay ALT
Buryatiya BRY
China North-Central CHN
China South-Central CHC
China Southeast CHS
Chita CTA
Inner Mongolia CHI
Irkutsk IRK
Kazakhstan KAZ
Khabarovsk KHA
Kirgizstan KGZ
Korea KOR
Krasnoyarsk KRA
Magadan MAG
Mongolia MON
Primorye PRM
Qinghai CHQ
Tadzhikistan TZK
Tibet CHT
Tuva TVA
Xinjiang CHX
Yakutiya YAK
Alaska ASK NORTHERN AMERICA
Alberta ABT
British Columbia BRC
Colorado COL
Greenland GNL
Manitoba MAN
Michigan MIC
Montana MNT
Newfoundland NFL
Northwest Territories NWT
Nunavut NUN
Ontario ONT
Québec QUE
Vermont VER
Wyoming WYO
Yukon YUK
East Himalaya EHM ASIA-TROPICAL
Nepal NEP
Pakistan PAK
West Himalaya WHM

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 32 in flower of 33 examined

Peak flowering in May. Each bar is the share of Braya humilis 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. 32 of 33 examined observations were in flower, every one of them research grade. The whisker on each bar is a 95% Wilson interval. 9 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.

Where it actually grows measured, from 199 observations

Condition 5th percentile Median 95th percentile
Coldest month, mean daily low -35.1 °C -17.7 °C -9.9 °C
Warmest month, mean daily high 13.7 °C 20.5 °C 29.6 °C
Annual rainfall 310 mm 549 mm 1,020 mm
Rainfall in the driest quarter 9 mm 44 mm 174 mm

It is found where winters are arctic. This is not care advice and it is not a forecast. It is a measurement: we sampled the climate at every one of the 199 research-grade observations of Braya humilis 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 32 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.

  • Arabidopsis novae-angliae (Rydb.) Britton
  • Arabidopsis richardsonii Rydb.
  • Arabidopsis trichocarpa R.F.Huang
  • Arabidopsis tuemurnica K.C.Kuan & C.H.An
  • Arabis sinuata Turcz.
  • Braya humilis subsp. arctica (Böcher) Rollins
  • Braya humilis subsp. ventosa Rollins
  • Braya humilis var. humilis
  • Braya intermedia T.J.Sørensen
  • Braya novae-angliae (Rydb.) T.J.Sørensen
  • Braya novae-angliae subsp. abbei Böcher
  • Braya novae-angliae subsp. novae-angliae T.J. Sorensen
  • Braya novae-angliae subsp. ventosa (Rollins) Böcher
  • Braya novae-angliae var. interior Böcher
  • Braya novae-angliae var. laurentiana Böcher
  • Braya richardsonii Fernald
  • Cardaminopsis sinuata (Turcz.) O.E.Schulz
  • Dichasianthus humilis (C.A.Mey.) Soják
  • Erysimum sinuatum (Turcz.) Kuntze
  • Hesperis hygrophylla Kuntze
  • Neotorularia grubovii (Botsch.) Botsch.
  • Neotorularia humilis (C.A.Mey.) Hedge & J.Léonard
  • Neotorularia mongolica Botsch. & Gubanov
  • Pilosella novae-angliae Rydb.

and 8 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 NEHU2. 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.