Cesar Ormazabal, CC BY, iNaturalist via GBIF · observed growing wild

Eriosyce spinosior (F.Ritter) P.C.Guerrero & Helmut Walter

Cactaceae

Climate known 1 photograph 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.

About the genus · Eriosyce

Eriosyce is a genus of cacti native to Chile.

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

Family

Cactaceae

Described by

(F.Ritter) P.C.Guerrero & Helmut Walter

Native to

Chile Central

Wild records

20 in range· 0 open

At a glance

Warmest month

25°C

Jan, mean day; nights 15 °C (CHELSA)

Rain

175mm/yr

4 wet months · peak Jul 58 mm (CHELSA)

Light

20–55DLI

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 Eriosyce, which is reliably one kind of plant (archetype table). Rain rule: a winter growing season, November to February in the northern hemisphere (May to August at the habitat, southern). Habitat rain 175 mm a year, wettest July at 58 mm, driest January at 2 mm (habitat calendar, southern hemisphere). Open sky over the habitat: 20 to 55 mol/m²/day. Cold floor 5.9 °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 Chilenia fobeana (Mieckley) Backeb.; Chilenia jussieui (Monv. ex Salm-Dyck) Backeb.; Echinocactus fobeanus Mieckley; Echinocactus foeanus Mieckley; Echinocactus jussieui Monv. and 29 more.

Cultivation

Grouped as a cactus or succulent by the genus Eriosyce, 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 winter growing season, November to February in the northern hemisphere (May to August at the habitat, southern).

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

The rain rule reads a winter growing season: 70% of the year's rain (148 mm of 175 mm) falls in May to August, cooler than the year (wet-season mean 12.3 °C against a yearly mean of 15.1 °C). Months are the habitat's, southern hemisphere; shifted six months for a northern-hemisphere collection: November to February.

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 175 mm a year, wettest July at 58 mm, driest January at 2 mm (habitat calendar, southern hemisphere).

This species’ habitat figures, with their source.

175 mm a year at the habitat, 148 mm of it May to August. Wettest month July at 58 mm, driest January at 2 mm; 7 months under 5 mm. Across the envelope cells the year's total runs 135 mm to 285 mm (10th to 90th percentile of each cell's own year) (median year across the envelope cells, CHELSA; habitat calendar, southern 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: 20 to 55 mol/m²/day.

This species’ habitat figures, with their source.

Open sky over the habitat: 20 to 55 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 19, the highest 90th-percentile month 57).

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 5.9 °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 5.9 °C, the absolute minimum 2.4 °C, no frost in 44 years (NASA POWER daily minima). Warmest: the 99th-percentile day is 31.9 °C. Monthly means: coldest night 7.8 °C in July (across the envelope cells 5.3 °C to 10.0 °C), warmest day 24.5 °C in January (median year across the envelope cells, CHELSA). Cold floor: 5.9 °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: 60 to 63% 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 14 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	25 / 20–27	24 / 20–27	24 / 20–26	22 / 18–24	19 / 17–22	17 / 15–20	17 / 14–19	17 / 15–20	19 / 15–21	20 / 17–23	22 / 18–25	24 / 19–26
Night °C	15 / 15–18	16 / 15–18	15 / 14–18	14 / 12–15	12 / 9–13	9 / 7–11	8 / 5–10	9 / 7–10	10 / 8–11	11 / 10–13	13 / 12–15	14 / 13–17
Rain mm	2 / 0–7	2 / 0–6	4 / 2–8	4 / 2–8	28 / 19–40	33 / 29–46	58 / 42–81	29 / 21–41	8 / 5–14	3 / 2–11	2 / 1–8	2 / 0–7
DLI	54 / 53–56	49 / 47–51	41 / 39–42	31 / 30–33	23 / 22–25	20 / 19–21	22 / 21–23	28 / 27–29	36 / 35–37	46 / 45–47	53 / 52–54	55 / 54–57
RH %	60 / 55–68	61 / 55–68	62 / 55–69	63 / 52–69	62 / 49–69	61 / 47–69	61 / 48–68	62 / 49–68	62 / 52–67	60 / 53–67	60 / 53–67	60 / 54–67

Each figure is the median across the 14 grid cells holding the 18 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 2416:2169 (-30.825, -71.525). Over 44 years there: absolute minimum 2.4 °C, 1st-percentile night 5.9 °C, 99th-percentile day 31.9 °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 14 distinct grid cells holding the 18 in-range records; extremes and elevation at the typical cell 2416:2169 (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 -31.00_-71.250, lapse-corrected -370 m at 6.5 °C/km. Elevation: ETOPO 2022, 356 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.

No openly licensed record to show inside the range.

NativeChile Central

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

Map marker-30.05, -71.15 · in the densest population, 20 records (100% of those in range)

Evidence usedThe map marker and the climate envelope rest on all 20 georeferenced records inside the native range; none carries a licence permitting republication, so the map shows no points. 1 record outside the range (gardens, roadsides, misidentifications) ignored. 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 centre of the tenth-degree cell nearest the middle (no openly licensed record lies in the population, so no record's coordinates are published) of the densest 1° population of the 20 in-range records; it decides nothing.

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 Eriosyce spinosior, most cited first, from OpenAlex (CC0). A mention, not a cultivation source: nothing on this page is drawn from them.

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