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Woodsia oregana; photograph Jim Morefield from Nevada, USA, CC BY-SA 2.0, via Wikimedia Commons CC BY-SAJim Morefield from Nevada, USA, CC BY-SA 2.0, via Wikimedia Commons

Woodsia oregana D.C.Eaton

Aspleniaceae · Alberta, British Columbia +25

English names not checked: Wikidata's common names were not read for this page.

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Woodsia oregana, photograph Jim Morefield from Nevada, USA, CC BY-SA 2.0, via Wikimedia CommonsWoodsia oregana, photograph Jim Morefield from Nevada, USA, CC BY-SA 2.0, via Wikimedia CommonsWoodsia oregana, photograph Jim Morefield from Nevada, USA, CC BY-SA 2.0, via Wikimedia CommonsWoodsia oregana, photograph Jhorthos, CC BY-SA 4.0, via Wikimedia CommonsWoodsia oregana, photograph author not stated, Public domain, via Wikimedia CommonsWoodsia oregana, photograph Andrey Zharkikh from Salt Lake City, USA, CC BY 2.0, via Wikimedia Commons 9 photographs ›
Habitat figures
Cold floor (1 night in 100)
-21.9°C
Record low -38.3 °C in 44 years, at a typical spot in the range NASA POWER
Warmest month, mean daily high
27°C
Jul at the habitat CHELSA
Rain a year (median across the range)
491mm
12 months of 25 mm or more in the median year CHELSA
Open-sky light
11–47DLI
Lowest to highest month (DLI) CHELSA
The year in your months, northern hemisphere
  1. Jan
  2. Feb
  3. Mar
  4. Apr
  5. May
  6. Jun
  7. Jul
  8. Aug
  9. Sep
  10. Oct
  11. Nov
  12. Dec
Rain spread: 70% of the median year's rain takes 8 months, so no short rainy season. rain rule, CHELSA
Northern hemisphere unless you set your site. The chart is in the habitat's months.

Summary

Physematium oreganum, the Oregon cliff fern, is a deciduous perennial fern in the family Woodsiaceae.

Quoted from Wikipedia, "Physematium oreganum", CC BY-SA 4.0.

Cultivation

Seasons

The rain rule reads no short rainy season: 70% of the median year's rain (337 mm of 475 mm) takes 8 months, November to January and March to July. Mean temperature moves 24.3 °C between the warmest and coldest month. Months are the habitat's, northern hemisphere; shifted six months for a southern-hemisphere collection: September to January and May to July.

Rain

475 mm in the median year at the habitat, 337 mm of it November to January and March to July. Wettest month May at 54 mm, driest month February at 30 mm. Across the grid cells of the range the year's total runs 284 mm to 986 mm, the 10th to 90th percentile of each cell's own year. The median of the cells' own yearly totals, 491 mm, is the year's rain at the top of the page; the 475 mm here is the median year's, the twelve monthly medians added, which the rain rule reads. Habitat calendar, northern hemisphere; median year across the grid cells of the range, CHELSA.

Light

Open sky over the habitat: 11 to 47 mol/m²/day across the year (daily light integral, median year across the grid cells of the range, CHELSA; the lowest 10th-percentile month across the cells is 6, the highest 90th-percentile month 52).

Warmth and air
Temperature

Coldest: the 1st-percentile night over 44 years at a typical spot in the range is -21.9 °C, the absolute minimum -38.3 °C, 7,649 frost nights in 44 years, 173.8 a year (NASA POWER daily minima). Warmest: the 99th-percentile day is 37.0 °C. Monthly means: the coldest month's mean nightly low -8.5 °C in January and December (across the grid cells of the range -14.3 °C to -3.8 °C), the warmest month's mean daily high 26.8 °C in July (median year across the grid cells of the range, CHELSA). Cold floor: -21.9 °C, which is the 1st-percentile night over 44 years at a typical spot in the range (NASA POWER).

Humidity

Relative humidity at the habitat: 49 to 61% across the year (monthly means, median year across the grid cells of the range, CHELSA). A figure about the air, saying nothing about how the plant takes water.

How this section is made

Each card states this species' habitat figures with their sources, and what two fixed rules read from them; nothing here says what the plant does, wants or tolerates. The rules · the terms.

Seasons. Read from the median year of CHELSA monthly rainfall and mean temperature across the grid cells of the range: the rain rule takes the smallest set of months carrying 70% of the rain and calls it winter when its mean is more than half a degree below the year's, summer when more than that above, and neither in between; the temperature rule, used only under 120 mm, names the cooler six months when they are at least a degree cooler than the other six. Months are shifted for the other hemisphere only where the temperature curve moves 4 °C or more and the habitat lies 10° or more from the equator. A reading of the curves, not an observation of the plant.

Rain. CHELSA monthly precipitation, median year across the grid cells of the range. The rain that falls where the species is recorded; nothing about how the plant takes water.

Light. CHELSA shortwave radiation at each envelope cell, a daily-mean flux taken to a daily total and converted at 2.07 mol of PAR per MJ. The sky over the habitat, measured; what reaches a plant under a rock, a shrub or a shade cloth is not.

Temperature. NASA POWER daily minima and maxima over 44 years at a typical spot in the range, lapse-corrected +95 m to its elevation; CHELSA monthly means, median year across the grid cells of the range. The cold floor is the 1st-percentile night named in its sentence. Not a measured survival limit for any plant in a pot.

Humidity. CHELSA relative humidity, median year across the grid cells of the range.

Climate across the habitat

Habitat months, northern hemisphere

Habitat climate of Woodsia oregana through the yearWarmest month July, mean daily high 27 °C; coldest months January and December, mean nightly low -8.5 °C; 475 mm of rain in the median year (the twelve monthly medians added). Medians across the range, from CHELSA; the extremes at the edge from NASA POWER. Habitat months, northern hemisphere.-40°-20°0°20°40°frost37.0° 99th-percentile day, NASA POWER-38.3° lowest night in 44 years, NASA POWER°C · day and nightcold quarter0255075100125mm rainDLI 11–47RH 49–61%JanFebMarAprMayJunJulAugSepOctNovDec
day night rain medians and 10th–90th percentile across 806 habitat cells, CHELSA cold quarter: the three months around the coldest month's mean nightly low extremes over 44 years at a typical spot in the range, from NASA POWER, marked at the edge, in no month DLI, mol/m²/dayRH %each on its own scale
Figures by month
JanFebMarAprMayJunJulAugSepOctNovDec
Day °C0 / -5–53 / -4–77 / 0–1212 / 5–1617 / 11–2222 / 17–2727 / 21–3126 / 21–3021 / 16–2514 / 8–185 / 0–100 / -5–4
Night °C-9 / -14–-4-7 / -13–-3-4 / -9–10 / -6–45 / -1–99 / 4–1313 / 8–1713 / 7–178 / 3–123 / -3–7-4 / -10–0-9 / -15–-4
Rain mm37 / 11–10530 / 14–8438 / 21–8743 / 21–8454 / 25–10249 / 19–9637 / 10–8435 / 9–8336 / 14–7537 / 21–8538 / 16–10941 / 13–114
DLI13 / 8–2020 / 15–2729 / 24–3637 / 33–4443 / 39–4947 / 42–5247 / 43–5142 / 37–4633 / 27–3822 / 16–2914 / 9–2111 / 6–18
RH %61 / 51–6659 / 52–6356 / 51–6054 / 49–5753 / 46–5651 / 42–5649 / 40–5449 / 41–5550 / 43–5553 / 47–5958 / 50–6561 / 51–67
How this section is made
Each figure is the median across the 806 grid cells on land that hold in-range records (1232 records in those cells; 1 more cell holds records but no land by the elevation layer, so those records sit at sea and the cell is left out), with the 10th–90th percentile span across those cells after the slash where it differs. A dash is a month one or more of those cells has no figure for in the grid (a variable CHELSA does not carry there), so no median is taken rather than one over fewer cells. Extremes and elevation were read at a typical spot in the range, cell 904:1505 (44.775, -104.725). Over 44 years there: absolute minimum -38.3 °C, 1st-percentile night -21.9 °C, 99th-percentile day 37.0 °C. Normals: CHELSA V2.1 1981–2010 climatology, 0.05° cells (each the mean of ~36 1 km pixels). Across the range: median and 10th–90th percentile of each month across the 806 distinct grid cells holding 1232 of the 1233 in-range records (1 further cell with records at sea, by the elevation layer, left out); extremes and elevation at the typical cell 904:1505 (its coldest month's mean nightly low nearest the median across cells); its position is the cell centre. Extremes: NASA POWER (MERRA-2) daily 1981–2024, cell 45.00_-105.000, lapse-corrected +95 m at 6.5 °C/km. Elevation: ETOPO 2022, 1238 m (cell mean).

Natural habitat

Native range as published by WCVP; the marker is where the records are densest and decides nothing: the climate was read across the cells of the in-range records placed well enough to read one, not at the marker.
Openly licensed records inside the range, framed on where they fall.

This species has no GBIF key of its own. Its records are GBIF's under the keys of the names Kew's World Checklist holds as this plant: 5275072 (Woodsia oregana D.C.Eaton, 2000 records), 9795246 (Woodsiopsis oregana (D.C.Eaton) Shmakov, 0 records). No name was matched to GBIF; the keys are read from Kew's synonymy. How.

NativeAlberta, British Columbia, Manitoba, Saskatchewan, Ontario, Québec, Colorado, Idaho, Montana, Oregon, Washington, Wyoming, Iowa, Kansas, Minnesota, North Dakota, Nebraska, Oklahoma, South Dakota, Wisconsin, Michigan, New York, Arizona, California, Nevada, Utah, New Mexico · regions are the level-3 units of the World Geographical Scheme for Recording Plant Distributions, as Kew's World Checklist records ranges, some under historical names such as Yugoslavia or Czechoslovakia (how).
Map marker49.042, -119.559 · in the densest population, 318 records (19% of those in range)
Evidence usedThe map marker rests on all 1645 georeferenced records inside the native range; the climate across the range on the 1232 of them in the land cells it reads, of 1233 placed to within 10 km; the map shows only the 931 openly licensed ones, which alone would put the marker 1 km away. 4 records outside the WCVP native range not used. 412 in-range records are placed to worse than 10 km, or with no stated accuracy (admitted only as a person's observation to three decimals), and stay on the map but off the climate.
Other GBIF keysRecords also from GBIF's key 5275072 (Woodsia oregana D.C.Eaton): Kew's file holds it as Woodsia oregana D.C.Eaton (accepted); 2,000 records, from GBIF's download.Records also from GBIF's key 9795246 (Woodsiopsis oregana (D.C.Eaton) Shmakov): Kew's file holds it as Woodsiopsis oregana (D.C.Eaton) Shmakov (synonym under Woodsia oregana D.C.Eaton); 0 records, from GBIF's search API on the day of the build.
How this section is made
The map marker: the openly licensed record nearest the middle of the densest 1° population of the 1645 in-range records; it decides nothing. Records outside the native range, living specimens and records marked introduced are not used; which records count.

Photographs

Woodsia oregana, photograph 1did not loadWoodsia oregana, photograph 2did not loadWoodsia oregana, photograph 3did not loadWoodsia oregana, photograph 4did not loadWoodsia oregana, photograph 5did not loadWoodsia oregana, photograph 6did not load

Photographs: Jim Morefield from Nevada, USA, CC BY-SA 2.0, via Wikimedia Commons (3); Jhorthos, CC BY-SA 4.0, via Wikimedia Commons; author not stated, Public domain, via Wikimedia Commons; Andrey Zharkikh from Salt Lake City, USA, CC BY 2.0, via Wikimedia Commons.

Similar habitat climate The 6 nearest by mean daily high, mean nightly low and rain, month by month. How.

Juniperus scopulorum Juniperus scopulorum Rocky Mountain juniper Photo: CC BY, Daughter DadRanunculus glaberrimus Ranunculus glaberrimus Sagebrush buttercup Photo: CC BY, Cody HinchliffRosa woodsii Rosa woodsii Woods' rose Photo: CC0, author not statedPseudoroegneria spicata Pseudoroegneria spicata Bluebunch wheatgrass Photo: CC0, author not statedLomatium multifidum Lomatium multifidum Carrot-leaved desert-parsley Photo: CC BY, Abby HydeFritillaria pudica Fritillaria pudica Yellow fritillary Photo: CC BY, Casey H. Richart

Other Woodsia 7 in the reference

Woodsia alpina Woodsia alpina Alpine woodsia Photo: CC BY, hkujalaWoodsia caucasica Woodsia caucasica Aspleniaceae Photo: CC BY-SA, El GrafoWoodsia glabella Woodsia glabella Smooth woodsia Photo: CC BY, ivansemenkovWoodsia ilvensis Woodsia ilvensis Rusty woodsia Photo: CC BY, kursicWoodsia obtusa Woodsia obtusa Aspleniaceae Photo: CC BY-SA, JaknouseWoodsia polystichoides Woodsia polystichoides Holly fern woodsia Photo: CC BY, Tatyana PetrenkoWoodsia scopulina Woodsia scopulina Aspleniaceae Photo: CC BY-SA, Jim Morefield from Nevada, USA

Names & registers

Also known as Woodsiopsis oregana. (WCVP, RBG Kew)

IPNIPOWOWikidataWFOWikipedia

The record

Family
Aspleniaceae
Described by
D.C.Eaton
Native to
Alberta, British Columbia, Manitoba +24
Wild records
1645 in range · 931 open

Every figure here is derived from public data by a stated rule and names its source; nothing about this species is written for its page by a person or by AI, apart from the marked, credited quotations. How →

Where this page came from built 2026-10-22
Kew's names (WCVP) kew.names answeredas of 2026-06-04Kew's entry Woodsia oregana D.C.Eaton (plant_name_id 3149391), read from Kew's names file
GBIF species record gbif.species not askedGBIF's backbone holds no one accepted species of this name, and a name it holds only as another species' synonym is not taken for this one, so GBIF's records were not asked
GBIF synonyms gbif.synonyms not askedGBIF's backbone holds no one accepted species of this name, and a name it holds only as another species' synonym is not taken for this one, so GBIF's records were not asked
GBIF common names gbif.vernacular not askedGBIF's backbone holds no one accepted species of this name, and a name it holds only as another species' synonym is not taken for this one, so GBIF's records were not asked
WCVP native range wcvp.distribution answeredas of 2026-06-04
GBIF occurrence records gbif.occurrences answeredasked 2026-10-22this species has no GBIF key of its own; its records are read under GBIF's keys for the names Kew's file holds as this plant, never by a name matched; GBIF occurrence download https://doi.org/10.15468/dl.hbdw64, of 2026-10-21; 2000 records of GBIF's key 5275072, Woodsia oregana D.C.Eaton (Kew's file holds it as Woodsia oregana D.C.Eaton (accepted)): the GBIF download; 0 records of GBIF's key 9795246, Woodsiopsis oregana (D.C.Eaton) Shmakov (Kew's file holds it as Woodsiopsis oregana (D.C.Eaton) Shmakov (synonym under Woodsia oregana D.C.Eaton)): GBIF occurrence search API; 12 records within 1 km of a botanic garden, herbarium or zoo left out (8 at a botanic garden or arboretum, 4 at a zoo; Wikidata's list)
Habitat climate climate answeredasked 2026-10-22
Daily extremes (NASA POWER) climate.extremes answeredasked 2026-10-22NASA POWER (MERRA-2) daily 1981–2024, cell 45.00_-105.000, lapse-corrected +95 m at 6.5 °C/km
Wikidata wikidata answeredasked 2026-10-22found by Kew's IPNI identifier 17235010-1, POWO 17235010-1
Wikipedia wikipedia answeredasked 2026-10-22Wikipedia's article Physematium oreganum, the English article of this species' Wikidata item (Q7486812)
iNaturalist photographs, wild inat.photos.wild not asked
iNaturalist photographs, cultivated inat.photos.cultivated not asked
GBIF media gbif.media not askedGBIF's backbone holds no one accepted species of this name, and a name it holds only as another species' synonym is not taken for this one, so GBIF's records were not asked
Wikimedia Commons commons answeredasked 2026-10-22
OpenAlex papers openalex not askednot yet asked for this reference; a later fill takes the papers from OpenAlex's snapshot

Every source is recorded as having answered, reported nothing, refused, failed, not been asked, or answered twice where one answer is taken (“not taken: two items answered”), and, for a source asked when this page was built, when: the figures are as the source held them that day; a source read from a file (Kew's World Checklist, a GBIF download) says "as of" the file's day instead; a row carried from an earlier build of the page names that build instead. Only “nothing to report” is ever shown as an absence. Records came from 106 datasets via GBIF.org; each carries its own licence.

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