Pinguicula caerulea, CR-325, Hawthorne, FL, US

Pinguicula caerulea Walter

Blueflower butterwort (EN), blue butterwort, blueflower butterwort, blueflower butterwort

Climate known 79 photographs Carnivorous plant

Every figure on this page is derived from public data by a stated rule and says its source; nothing here is written by a person or a model, except the Wikipedia passage, which is quoted and marked as such. How it is made.

Summary

Pinguicula caerulea, commonly referred to as blue butterwort, blueflower butterwort, or violet butterwort, is a flowering plant species in the carnivorous butterwort (Pinguicula) genus and bladderwort family (Lentibulariaceae). It is a perennial dicot. It grows in moist sandy pineland habitat in the south-east USA. Caerulus is Latin for from the sky or sea and refers to the color of the flowers.

Text from Wikipedia, “Pinguicula caerulea”, CC BY-SA 4.0, quoted as written. Kept separate from everything derived here.

About the genus · Pinguicula

Pinguicula, commonly known as butterworts, is a genus of carnivorous flowering plants in the family Lentibulariaceae. They use sticky, glandular leaves to lure, trap, and digest insects in order to supplement the poor mineral nutrition they obtain from the environment. 126 species are currently accepted. More on Wikipedia ›

The opening of Wikipedia, “Pinguicula”, CC BY-SA 4.0, quoted as written.

Family

Lentibulariaceae

Described by

Walter

Native to

Florida, Georgia, North Carolina +1

Wild records

911 in range· 237 open

At a glance

Warmest month

32°C

Jul, mean day; nights 24 °C (CHELSA)

Rain

1381mm/yr

12 wet months · peak Aug 194 mm (CHELSA)

Light

18–41DLI

mol/m²/day, winter to summer, open sky (CHELSA shortwave)

In short condensed by rule from the cultivation cards · not written by a person

Grouped as a carnivorous plant by the genus Pinguicula, which is reliably one kind of plant (archetype table). Rain rule: a summer growing season, January, March and June to October in the northern hemisphere (January, March and June to October at the habitat, northern). Habitat rain 1381 mm a year, wettest August at 194 mm, driest November at 63 mm (habitat calendar, northern hemisphere). Open sky over the habitat: 18 to 41 mol/m²/day. Cold floor -2.7 °C (1st-percentile habitat night, NASA POWER).

Each sentence is one card's own one-line form, written by the same rule as the card (Its year, Rain, Light, Temperature); the note cannot say what a card does not. Months are given for the northern hemisphere (set your site in Settings to change this), and the habitat's own alongside. The cards · the figures.

Also known as Isoloba elatior (Michx.) Raf.; Pinguicula australis Chapm.; Pinguicula caerulea f. leucantha D.E.Schnell; Pinguicula elatior Michx.

Cultivation

Grouped as a carnivorous plant by the genus Pinguicula, which is reliably one kind of plant (archetype table). The table holds no figure for this group, which spans too much for one minimum; the cold floor is the habitat's alone, and no prose comes from the table.

Its year Rain rule: a summer growing season, January, March and June to October in the northern hemisphere (January, March and June to October at the habitat, northern).

This species’ habitat figures, and what two fixed rules read from them.

The rain rule reads a summer growing season: 70% of the year's rain (1002 mm of 1381 mm) falls in January, March and June to October, warmer than the year (wet-season mean 22.0 °C against a yearly mean of 20.0 °C). Months are the habitat's, northern hemisphere; shifted six months for a southern-hemisphere collection: December to April, July and September.

Read from the median year of CHELSA monthly rainfall and mean temperature across the envelope cells: 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 gives a season to reverse. A reading of the curves, not an observation of the plant.

Rain Habitat rain 1381 mm a year, wettest August at 194 mm, driest November at 63 mm (habitat calendar, northern hemisphere).

This species’ habitat figures, with their source.

1381 mm a year at the habitat, 1002 mm of it January, March and June to October. Wettest month August at 194 mm, driest November at 63 mm. Across the envelope cells the year's total runs 1272 mm to 1498 mm (10th to 90th percentile of each cell's own year) (median year across the envelope cells, CHELSA; habitat calendar, northern hemisphere).

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

Light Open sky over the habitat: 18 to 41 mol/m²/day.

This species’ habitat figures, with their source.

Open sky over the habitat: 18 to 41 mol/m²/day across the year (daily light integral, median year across the envelope cells, CHELSA; the lowest 10th-percentile month across the cells is 16, the highest 90th-percentile month 42).

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.

Warmth and air Cold floor -2.7 °C (1st-percentile habitat night, NASA POWER).

This species’ habitat figures, with their source.

Temperature

Coldest: the 1st-percentile night over 44 years at the typical cell is -2.7 °C, the absolute minimum -11.0 °C, about 11 frost nights a year (NASA POWER daily minima). Warmest: the 99th-percentile day is 38.0 °C. Monthly means: coldest night 7.8 °C in January (across the envelope cells 4.7 °C to 12.4 °C), warmest day 31.7 °C in July (median year across the envelope cells, CHELSA). Cold floor: -2.7 °C, which is the 1st-percentile night over 44 years at the typical cell (NASA POWER).

NASA POWER daily minima and maxima 1981–2024 at the typical cell, lapse-corrected to its elevation; CHELSA monthly means, median year across the envelope cells, CHELSA. The cold floor is the figure named in its sentence. Not a measured survival limit for any plant in a pot.

Humidity

Relative humidity at the habitat: 56 to 64% across the year (monthly means, median year across the envelope cells, CHELSA). A figure about the air, saying nothing about how the plant takes water.

CHELSA relative humidity, median year across the envelope cells.

The figures the cards read from are in Climate below, and where they came from in Natural habitat.

Climate across the habitat

day night rain 10th–90th percentile across 326 habitat cells cold quarter: the three months around the coldest night extremes over 44 years at the typical cell, marked at the edge: undated DLI, mol/m²/dayRH %each on its own scale

Figures by month

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Day °C	17 / 13–22	19 / 14–23	22 / 17–25	26 / 22–27	29 / 25–30	31 / 29–32	32 / 30–33	31 / 29–32	30 / 27–30	26 / 23–28	22 / 18–25	19 / 14–23
Night °C	8 / 5–12	9 / 6–14	12 / 9–15	15 / 13–18	19 / 17–21	22 / 21–24	24 / 23–25	24 / 23–25	22 / 20–24	18 / 15–21	13 / 11–17	9 / 6–14
Rain mm	89 / 55–115	89 / 66–114	109 / 94–136	72 / 62–86	79 / 62–110	177 / 128–209	180 / 147–208	194 / 158–215	162 / 113–201	91 / 76–115	63 / 52–88	76 / 56–101
DLI	20 / 17–22	24 / 22–27	31 / 30–33	39 / 38–40	41 / 40–42	39 / 37–40	38 / 37–39	34 / 34–36	30 / 29–32	26 / 25–28	21 / 19–23	18 / 16–20
RH %	58 / 57–58	58 / 57–59	57 / 56–58	56 / 55–58	58 / 57–60	62 / 61–64	63 / 62–65	64 / 63–65	63 / 61–64	60 / 58–61	58 / 57–59	58 / 57–59

Each figure is the median across the 326 grid cells holding the 551 in-range records, with the 10th–90th percentile span across those cells after the slash where it differs. Extremes and elevation were read at the typical cell 1185:1965 (30.725, -81.725). Over 44 years there: absolute minimum -11.0 °C, 1st-percentile night -2.7 °C, 99th-percentile day 38.0 °C. Normals: CHELSA V2.1 1981–2010 climatology, 0.05° cells (each the mean of ~36 1 km pixels). Envelope: median and 10th–90th percentile of each month across the 326 distinct grid cells holding the 551 in-range records; extremes and elevation at the typical cell 1185:1965 (its coldest month's mean night nearest the median across cells); its position is the cell centre. Extremes: NASA POWER (MERRA-2) daily 1981–2024, cell 30.50_-81.875, lapse-corrected -15 m at 6.5 °C/km. Elevation: ETOPO 2022, 4 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 every in-range record's cell, not at the marker.

Openly licensed records inside the range, framed on where they fall.

NativeFlorida, Georgia, North Carolina, South Carolina

Kew's description“perennial” · “subtropical”· quoted from WCVP, RBG Kew (CC BY 4.0); not derived here

Map marker29.831, -82.131 · in the densest population, 386 records (42% of those in range)

Evidence usedThe map marker and the climate envelope rest on all 911 georeferenced records inside the native range; the map shows only the 237 openly licensed ones, which alone would put the marker 38 km away. 8 records outside the range (gardens, roadsides, misidentifications) ignored. 360 in-range records are placed to worse than 10 km and stay on the map but off the climate.

The map markerthe map marker: the openly licensed record nearest the middle of the densest 1° population of the 911 in-range records; it decides nothing.

Photographs

Photographs: (c) Ashwin Srinivasan, some rights reserved (CC BY) (3); (c) Nash Turley, some rights reserved (CC BY) (2); (c) Josiah Londerée, some rights reserved (CC BY); (c) Jay Horn, some rights reserved (CC BY) (2).

Photographs: iNaturalist did not answer when this page was built; what is shown came from the sources that did.

Papers naming this species

Works whose title or abstract names Pinguicula caerulea, most cited first, from OpenAlex (CC0). A mention, not a cultivation source: nothing on this page is drawn from them.

Pinguiculaspecies (Lentibulariaceae) from the southeastern United States: observations of different habitats in Florida

Oliver Gluch (2005) · Acta Botanica Gallica

Occurrence Download