18 photographs › At a glance
- Jan, shaded
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Summary
Eucrosia bicolor is a species of plant found in Ecuador and Peru. Its natural habitats are seasonally dry lowland areas. It was the first species of Eucrosia to be scientifically described, in 1817, and the first to be introduced into cultivation in Europe, flowering outside its homeland for the first time in 1817. It is the most widely grown species of Eucrosia.
Quoted from Wikipedia, "Eucrosia bicolor", CC BY-SA 4.0.
Cultivation
Grouped as a bulb, tuber or caudex, listed under the family Amaryllidaceae in the archetype table, and Kew describes it as “bulbous geophyte”.
Seasons
The rain rule reads a sharp season: 70% of the median year's rain (1,064 mm of 1,314 mm) falls in January to April. The temperature curve is flat, 2.5 °C between the warmest and coldest month, so the growing-season rule does not infer a growing season from it. Months are the habitat's, southern hemisphere. The habitat lies within 10° of the equator, where the shift rule does not apply, so they are not shifted for a collection elsewhere.
Rain
1,314 mm in the median year at the habitat, 1,064 mm of it January to April. Wettest month February at 326 mm, driest month August at 6 mm. Across the grid cells of the range the year's total runs 723 mm to 1,487 mm, the 10th to 90th percentile of each cell's own year. The median of the cells' own yearly totals, 1,320 mm, is the year's rain at the top of the page; the 1,314 mm here is the median year's, the twelve monthly medians added, which the rain rule reads. Habitat calendar, southern hemisphere; median year across the grid cells of the range, CHELSA.
Light
Open sky over the habitat: 22 to 28 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 20, the highest 90th-percentile month 35).
Warmth and air
Coldest: the 1st-percentile night over 44 years at a typical spot in the range is 18.1 °C, the absolute minimum 16.9 °C, no frost in 44 years (NASA POWER daily minima). Warmest: the 99th-percentile day is 30.1 °C. Monthly means: the coldest month's mean nightly low 20.4 °C in September (across the grid cells of the range 19.2 °C to 21.1 °C), the warmest month's mean daily high 28.3 °C in March and December (median year across the grid cells of the range, CHELSA). Cold floor: 18.1 °C, which is the 1st-percentile night over 44 years at a typical spot in the range (NASA POWER).
Relative humidity at the habitat: 65 to 69% 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 +210 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.
Group. Listed under the family Amaryllidaceae 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, southern hemisphere
Mean daily high from 27 °C in Jun, Jul, Aug and Sep to 28 °C in Jan, Feb, Mar, Apr, May, Oct, Nov and Dec; mean nightly low from 20 °C in Sep to 23 °C in Jan, Feb, Mar and Apr. The cold quarter, Aug to Oct, is the three months around the coldest month's mean nightly low. 1,314 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 25 habitat cells. Over 44 years at a typical spot in the range (NASA POWER) the absolute minimum was 16.9 °C and the 99th-percentile day 30.1 °C; neither is dated to a month. 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 | 28 / 25–29 | 28 / 26–29 | 28 / 26–29 | 28 / 25–29 | 28 / 25–28 | 27 / 24–28 | 27 / 24–28 | 27 / 24–28 | 27 / 24–29 | 28 / 24–29 | 28 / 25–29 | 28 / 25–29 |
| Night °C | 23 / 22–23 | 23 / 22–23 | 23 / 22–23 | 23 / 22–23 | 22 / 21–23 | 21 / 20–22 | 21 / 19–21 | 21 / 19–21 | 20 / 19–21 | 21 / 20–21 | 21 / 20–22 | 22 / 21–23 |
| Rain mm | 201 / 104–220 | 326 / 166–389 | 316 / 144–367 | 221 / 112–241 | 81 / 47–94 | 33 / 22–42 | 20 / 10–25 | 6 / 4–15 | 9 / 5–20 | 8 / 5–24 | 28 / 12–32 | 65 / 34–80 |
| DLI | 22 / 21–31 | 22 / 22–31 | 25 / 24–33 | 25 / 24–33 | 23 / 22–31 | 22 / 20–30 | 23 / 21–31 | 26 / 23–34 | 27 / 24–35 | 27 / 24–35 | 28 / 25–35 | 25 / 23–33 |
| RH % | 67 / 65–71 | 69 / 66–71 | 68 / 66–71 | 68 / 65–72 | 68 / 65–73 | 67 / 64–73 | 67 / 63–74 | 66 / 61–73 | 66 / 61–72 | 66 / 61–72 | 65 / 60–72 | 65 / 61–71 |
How this section is made
Natural habitat
How this section is made
Photographs
Photographs: (c) Raúl A. Ruiz M., some rights reserved (CC BY) (6).
Related
Similar habitat climate The 6 nearest by mean daily high, mean nightly low and rain, month by month. How.
Pseudobombax millei Malvaceae Photo: CC BY, Pier Luiggi Maquilón
Vitex gigantea Lamiaceae Photo: CC BY, Raúl A. Ruiz M. Lemeltonia triglochinoides Bromeliaceae 
Oncidium planilabre Orchidaceae Photo: CC BY-SA, Orchi
Clavija pungens Primulaceae Photo: CC BY, Raúl A. Ruiz M.
Centrolobium ochroxylum Fabaceae Photo: CC BY, Raúl A. Ruiz M.Other Eucrosia 2 in the reference
Names & registers
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 answeredasked 2026-10-22GBIF occurrence download https://doi.org/10.15468/dl.hbdw64, of 2026-10-21; 0 records of GBIF's key 11243845, Eucrosia bicolor KerGawl. (Kew's file holds it as Eucrosia bicolor Ker Gawl. (accepted)): GBIF occurrence search API; 10 records within 1 km of a botanic garden, herbarium or zoo left out (8 at a botanic garden or arboretum, 2 at a herbarium; Wikidata's list)climate answeredasked 2026-10-22climate.extremes answeredasked 2026-10-22NASA POWER (MERRA-2) daily 1981–2024, cell -1.00_-80.625, lapse-corrected +210 m at 6.5 °C/kmwikidata 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 6 datasets via GBIF.org; each carries its own licence.