Fritillaria pinetorum Davidson
Pinewoods fritillary; Davidson's fritillary; Pine fritillary
92 photographs › At a glance
- Jan, shaded
- Feb, shaded
- Mar, shaded
- Apr
- May
- Jun, under 5 mm of rain
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec, shaded
Summary
Fritillaria pinetorum, the pinewoods fritillary or Davidson's fritillary, is an uncommon species of fritillary.
Quoted from Wikipedia, "Fritillaria pinetorum", CC BY-SA 4.0.
About the genus · Fritillaria
Fritillaria (fritillaries) is a genus of spring flowering herbaceous bulbous perennial plants in the lily family (Liliaceae). The type species, Fritillaria meleagris, was first described in Europe in 1571, while other species from the Middle East and Asia were also introduced to Europe at that time. The genus has about 130–140 species divided among eight subgenera. More on Wikipedia ›
Quoted from Wikipedia, "Fritillaria", CC BY-SA 4.0.
Cultivation
Grouped as a bulb, tuber or caudex, listed under the genus Fritillaria in the archetype table, and Kew describes it as “bulbous geophyte”.
Seasons
The rain rule reads a rainy season and no growing season: 70% of the median year's rain (409 mm of 575 mm) falls in December to March, the cooler part of the year, but the mean nightly low is below freezing in February, March, April and January, so the rule reads no growing season from it. Months are the habitat's, northern hemisphere; shifted six months for a southern-hemisphere collection: June to September.
Rain
575 mm in the median year at the habitat, 409 mm of it December to March. Wettest month February at 120 mm, driest month June at 4 mm; 1 month under 5 mm. Across the grid cells of the range the year's total runs 410 mm to 984 mm, the 10th to 90th percentile of each cell's own year. The median of the cells' own yearly totals, 573 mm, is the year's rain at the top of the page; the 575 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: 18 to 55 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 16, the highest 90th-percentile month 55).
Warmth and air
Monthly means: the coldest month's mean nightly low -4.1 °C in January and December (across the grid cells of the range -11.9 °C to -1.0 °C), the warmest month's mean daily high 25.7 °C in July (median year across the grid cells of the range, CHELSA). Cold floor: none read. The nearest figure is -4.1 °C, the coldest month's mean nightly low, January and December, in the median year (CHELSA); a month's mean of its nightly lows is warmer than the nights a floor is read from. The daily extremes were read at a weather cell whose ground is too far above or below the typical spot to correct for, and are not used.
Relative humidity at the habitat: 41 to 50% 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. CHELSA monthly means, median year across the grid cells of the range. No cold floor is read without a daily extremes series; the coldest month's mean nightly low named in its sentence is not one. Not a measured survival limit for any plant in a pot.
Humidity. CHELSA relative humidity, median year across the grid cells of the range.
Group. Listed under the genus Fritillaria in the archetype table, and Kew describes it as “bulbous geophyte”. A group is taken only where Kew's description of the species agrees with the table's listing. The table gives no figure and no prose; the cold floor is the habitat's alone.
Climate across the habitat
Habitat months, northern hemisphere
Mean daily high from 6 °C in Jan and Dec to 26 °C in Jul; mean nightly low from -4 °C in Jan, Feb and Dec to 12 °C in Jul and Aug. The cold quarter, Dec to Feb, is the three months around the coldest month's mean nightly low, centred on the 3 months in a row that tie for it. 575 mm of rain in the median year (the twelve monthly medians added), the wettest month Feb. The bands show the 10th to 90th percentile across 43 habitat cells. Beneath: daily light integral and relative humidity through the year, each on its own scale.
Figures by month
| Figure | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Day °C | 6 / -2–10 | 7 / -1–10 | 10 / 1–13 | 13 / 5–16 | 18 / 10–21 | 23 / 17–25 | 26 / 22–28 | 25 / 21–28 | 22 / 17–25 | 16 / 11–20 | 11 / 3–14 | 6 / -2–10 |
| Night °C | -4 / -12–-1 | -4 / -11–-1 | -2 / -10–1 | 0 / -7–3 | 4 / -3–6 | 8 / 3–10 | 12 / 7–14 | 12 / 7–14 | 9 / 3–11 | 4 / -2–7 | -1 / -8–2 | -4 / -12–-1 |
| Rain mm | 110 / 70–171 | 120 / 70–161 | 86 / 59–135 | 43 / 28–68 | 13 / 11–42 | 4 / 3–21 | 7 / 2–24 | 8 / 3–23 | 11 / 7–25 | 28 / 21–61 | 52 / 38–103 | 93 / 57–157 |
| DLI | 20 / 18–23 | 26 / 23–28 | 37 / 34–38 | 46 / 43–47 | 51 / 50–52 | 55 / 54–55 | 53 / 51–53 | 48 / 47–49 | 40 / 39–43 | 31 / 29–34 | 22 / 20–26 | 18 / 16–21 |
| RH % | 47 / 45–54 | 50 / 47–55 | 50 / 46–56 | 48 / 44–55 | 46 / 41–53 | 43 / 37–48 | 41 / 38–46 | 42 / 39–46 | 43 / 41–47 | 44 / 42–50 | 45 / 42–52 | 47 / 43–55 |
The daily extremes were not used: the correction for elevation, +1057 m, is beyond the 1,000 m either way that a lapse rate is applied over, so the weather cell's ground is other terrain than the typical spot's. So no cold floor is read for this species, and the coldest month's mean nightly low is not taken as one. What that cell gave, so corrected, over 44 years: absolute minimum -13.7 °C, 1st-percentile night -9.4 °C.
How this section is made
Natural habitat
How this section is made
Photographs
Photographs: (c) James M. Maley, some rights reserved (CC BY) (4); (c) T. J. Samojedny, some rights reserved (CC BY); (c) Chris Winchell, some rights reserved (CC BY).
Related
Similar habitat climate The 6 nearest by mean daily high, mean nightly low and rain, month by month. How.
Heuchera parishii Mill Creek alumroot Photo: CC BY, Trevor Van Loon
Silene parishii Parish's catchfly Photo: CC0, author not stated
Lilium parryi Lemon lily Photo: CC BY, Trevor Van Loon
Eriogonum kennedyi Kennedy's buckwheat Photo: CC BY, Steve Matson
Ranunculus calandrinioides Ranunculaceae Photo: CC BY-SA, peganum from Small Dole, England
Monardella linoides Flaxleaf monardella Photo: CC0, author not statedOther Fritillaria 117 in the reference
Fritillaria acmopetala Liliaceae Photo: CC BY, Ben Costamagna
Fritillaria affinis Checker lily Photo: CC BY-SA, Henry "Nick" Robertson
Fritillaria agrestis Stinkbells Photo: CC0, author not stated
Fritillaria alburyana Liliaceae Photo: CC BY, Averater Fritillaria alfredae Liliaceae 
Fritillaria amana Liliaceae Photo: CC BY, Moustapha Itani Fritillaria anhuiensis Liliaceae Fritillaria ariana Liliaceae Fritillaria armena Liliaceae 
Fritillaria assyriaca Liliaceae Photo: CC0, Dûrzan Fritillaria atrolineata Liliaceae 
Fritillaria atropurpurea Spotted fritillary Photo: CC BY, Whitney Brook Matson all 118 ›Names & registers
Also known as Fritillaria atropurpurea var. pinetorum. (GBIF Backbone)
The record
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
gbif.species answeredasked 2026-10-22gbif.synonyms answeredasked 2026-10-22gbif.vernacular answeredasked 2026-10-22names fetched 2026-10-22wcvp.distribution answeredas of 2026-06-04gbif.occurrences answeredas of 2026-10-21GBIF occurrence download https://doi.org/10.15468/dl.hbdw64, of 2026-10-21climate answeredasked 2026-10-22climate.extremes answeredasked 2026-10-22NASA POWER (MERRA-2) daily 1981–2024, cell 35.50_-118.750, lapse-corrected +1057 m at 6.5 °C/km; read, and set aside: the correction for elevation, +1057 m, is beyond the 1,000 m either way that a lapse rate is applied over, so the weather cell's ground is other terrain than the typical spot's, so no cold floor is shownwikidata answeredasked 2026-10-22wikipedia answeredasked 2026-10-22inat.photos.wild answeredasked 2026-10-22from iNaturalist's open data of 2026-09-27: research-grade observations with an open-licence photograph, the 24 whose photographs iNaturalist received last (the open data holds no votes); filled 2026-10-22inat.photos.cultivated not askedgbif.media answeredasked 2026-10-22none of the photographs on this page is credited to GBIF: those shown are other sources', and GBIF's were the same photographs or were set aside by the photograph rulesopenalex not askednot yet asked for this reference; a later fill takes the papers from OpenAlex's snapshotEvery 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 21 datasets via GBIF.org; each carries its own licence.