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Dudleya pachyphytum Moran & M.Benedict

Cedros Liveforever

Climate known Photographs not checked Cactus or succulent

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

Dudleya pachyphytum is an insular succulent plant known by the common name Cedros Island liveforever. It is a member of the genus Dudleya, in the family Crassulaceae. Characterized by thick, blunt leaves covered in a white, powdery wax and adorned by white flowers in bloom, it is regarded as one of the most attractive and charismatic members of its genus. It is endemic to the foggy northern end of Mexico's Cedros Island, occupying an ecological niche shared with the Cedros Island Pine.

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

About the genus · Dudleya

Dudleya, commonly known as liveforevers, is a genus of rosette-forming succulent plants in the stonecrop family, Crassulaceae, consisting of about ~70 taxa found in southwestern North America and Guadalupe Island. The genus is very morphologically diverse, with species ranging from large evergreen plants to tiny deciduous geophytic plants. The flowers of Dudleya have parts numbered in fives, with the petals arranged in tubular, star-shaped, or bell-shaped forms and, when fruiting, are filled with tiny, crescent-shaped seeds.

Text from Wikipedia, “Dudleya”, CC BY-SA 4.0, quoted as written.

Family

Crassulaceae

Described by

Moran & M.Benedict

Native to

Mexico Northwest

Wild records

13 in range· 11 open

At a glance

Warmest month

21°C

Sep, mean day; nights 19 °C (CHELSA)

Rain

70mm/yr

no wet month · peak Dec 16 mm (CHELSA)

Light

22–48DLI

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 cactus or succulent by the genus Dudleya, which is reliably one kind of plant (archetype table). Rain rule: no rainy season to read (70 mm a year); the temperature rule's cooler six months are December to May in the northern hemisphere. Habitat rain 70 mm a year, wettest December at 16 mm, driest June at 1 mm (habitat calendar, northern hemisphere). Open sky over the habitat: 22 to 48 mol/m²/day. Cold floor 10.1 °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.

Cultivation

Grouped as a cactus or succulent by the genus Dudleya, 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: no rainy season to read (70 mm a year); the temperature rule's cooler six months are December to May in the northern hemisphere.

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

Rain at the habitat is 70 mm a year (median year across the envelope cells, CHELSA). Under 120 mm the rain rule reads no rainy season, and the growing-season rule infers nothing from it. The temperature rule reads the cooler six months as December to May. Months are the habitat's, northern hemisphere; shifted six months for a southern-hemisphere collection: June to November.

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 70 mm a year, wettest December at 16 mm, driest June at 1 mm (habitat calendar, northern hemisphere).

This species’ habitat figures, with their source.

70 mm a year at the habitat. Wettest month December at 16 mm, driest June at 1 mm; 6 months under 5 mm. Across the envelope cells the year's total runs 66 mm to 219 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: 22 to 48 mol/m²/day.

This species’ habitat figures, with their source.

Open sky over the habitat: 22 to 48 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 22, the highest 90th-percentile month 52).

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 10.1 °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 10.1 °C, the absolute minimum 6.3 °C, no frost in 44 years (NASA POWER daily minima). Warmest: the 99th-percentile day is 21.8 °C. Monthly means: coldest night 13.2 °C in February (across the envelope cells 11.9 °C to 14.3 °C), warmest day 20.9 °C in September (median year across the envelope cells, CHELSA). Cold floor: 10.1 °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: 53 to 61% 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 5 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	16 / 15–21	16 / 15–22	16 / 15–24	16 / 15–26	17 / 17–28	18 / 17–30	19 / 19–31	20 / 20–32	21 / 20–31	20 / 19–28	19 / 18–24	17 / 16–21
Night °C	14 / 11–15	13 / 12–14	14 / 13–14	14 / 14–16	16 / 14–18	17 / 16–21	18 / 18–24	19 / 19–24	19 / 19–24	18 / 17–20	16 / 15–17	14 / 12–15
Rain mm	12 / 11–22	12 / 10–26	7 / 6–21	2 / 2–5	2 / 1–2	1 / 1–3	1 / 1–34	1 / 1–40	3 / 3–32	7 / 6–12	6 / 6–16	16 / 14–23
DLI	24 / 24–27	30 / 30–32	39 / 38–41	45 / 45–48	47 / 47–52	48 / 48–52	48 / 46–48	45 / 43–45	40 / 39–41	33 / 33–35	26 / 26–28	22 / 22–24
RH %	53 / 52–59	54 / 51–61	56 / 51–63	57 / 49–64	61 / 51–66	59 / 51–70	57 / 52–75	57 / 54–74	57 / 54–70	56 / 52–64	54 / 51–60	53 / 52–59

Each figure is the median across the 5 grid cells holding the 11 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 1234:1295 (28.275, -115.225). Over 44 years there: absolute minimum 6.3 °C, 1st-percentile night 10.1 °C, 99th-percentile day 21.8 °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 5 distinct grid cells holding the 11 in-range records; extremes and elevation at the typical cell 1234:1295 (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 28.50_-115.000, lapse-corrected +465 m at 6.5 °C/km. Elevation: ETOPO 2022, 473 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.

NativeMexico Northwest

Kew's description“succulent subshrub” · “desert or dry shrubland”· quoted from WCVP, RBG Kew (CC BY 4.0); not derived here

Map marker28.35, -115.233 · in the densest population, 11 records (85% of those in range)

Evidence usedThe map marker and the climate envelope rest on all 13 georeferenced records inside the native range; the map shows only the 11 openly licensed ones, which alone would put the marker in the same place. 2 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 13 in-range records; it decides nothing.

Papers naming this species

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

DUDLEYA DELGADILLOI AND DUDLEYA COCHIMIANA, TWO NEW, RARE SPECIES FROM ISLA CEDROS, BAJA CALIFORNIA, MÉXICO

Stephen Ward McCabe (2023) · Madroño

Occurrence Download