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Ageratina asclepiadea; photograph (c) GERMAN LEONEL SARMIENTO CRUZ, some rights reserved (CC BY) CC BY(c) GERMAN LEONEL SARMIENTO CRUZ, some rights reserved (CC BY) · observed growing wild · 2026-06-24

Ageratina asclepiadea (L.f.) R.M.King & H.Rob.

Asteraceae · Colombia

Cited as Kew's World Checklist cites it, Ageratina asclepiadea (L.f.) R.M.King & H.Rob.: GBIF's backbone key for this page carries the name with another author, (L.fil.) R.M.King & H.Rob.

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Ageratina asclepiadea, photograph (c) julianazuluaga-carrero, some rights reserved (CC BY-SA)Ageratina asclepiadea, photograph (c) julianazuluaga-carrero, some rights reserved (CC BY-SA)Ageratina asclepiadea, photograph (c) Nicolás Baresch Uribe, some rights reserved (CC BY)Ageratina asclepiadea, photograph (c) Nicolás Baresch Uribe, some rights reserved (CC BY)Ageratina asclepiadea, photograph (c) julianazuluaga-carrero, some rights reserved (CC BY-SA)Ageratina asclepiadea, photograph (c) julianazuluaga-carrero, some rights reserved (CC BY-SA) 50 photographs ›
Habitat figures
Cold floor (1 night in 100)
4.5°C
Record low 0.6 °C in 44 years, at a typical spot in the range NASA POWER
Warmest month, mean daily high
18°C
Jan, Feb, Mar and Sep at the habitat CHELSA
Rain a year (median across the range)
1,434mm
12 months of 25 mm or more in the median year CHELSA
Open-sky light
26–33DLI
Lowest to highest month (DLI) CHELSA
The year in the habitat's months, not shifted
  1. Jan
  2. Feb
  3. Mar
  4. Apr
  5. May
  6. Jun
  7. Jul
  8. Aug
  9. Sep
  10. Oct
  11. Nov
  12. Dec
A sharp rainy season, March to June and September to November (the habitat's months, not shifted), in a year of even temperature. rain rule, CHELSA
Not shifted: the shift rule does not apply to this habitat. The chart is in the habitat's months.

About the genus · Ageratina

Ageratina, commonly known as snakeroot, is a genus of over 300 species of perennials and rounded shrubs in the family Asteraceae.

Quoted from Wikipedia, "Ageratina", CC BY-SA 4.0.

Cultivation

Seasons

The rain rule reads a sharp season: 70% of the median year's rain (970 mm of 1,367 mm) falls in March to June and September to November. The temperature curve is flat, 0.7 °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, northern 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

1,367 mm in the median year at the habitat, 970 mm of it March to June and September to November. Wettest month April at 171 mm, driest month January at 58 mm. Across the grid cells of the range the year's total runs 988 mm to 2,316 mm, the 10th to 90th percentile of each cell's own year. The median of the cells' own yearly totals, 1,434 mm, is the year's rain at the top of the page; the 1,367 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: 26 to 33 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 22, the highest 90th-percentile month 38).

Warmth and air
Temperature

Coldest: the 1st-percentile night over 44 years at a typical spot in the range is 4.5 °C, the absolute minimum 0.6 °C, no frost in 44 years (NASA POWER daily minima). Warmest: the 99th-percentile day is 22.4 °C. Monthly means: the coldest month's mean nightly low 8.3 °C in July and August (across the grid cells of the range 6.3 °C to 10.7 °C), the warmest month's mean daily high 18.1 °C in September (median year across the grid cells of the range, CHELSA). Cold floor: 4.5 °C, which is the 1st-percentile night over 44 years at a typical spot in the range (NASA POWER).

Humidity

Relative humidity at the habitat: 61 to 67% 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 +203 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.

Climate across the habitat

Habitat months, northern hemisphere

Habitat climate of Ageratina asclepiadea through the yearWarmest months January, February, March and September, mean daily high 18 °C; coldest months July and August, mean nightly low 8.3 °C; 1,367 mm of rain in the median year (the twelve monthly medians added). Medians across the range, from CHELSA; the extremes at the edge from NASA POWER. Habitat months, northern hemisphere.-5°0°5°10°15°20°25°frost22.4° 99th-percentile day, NASA POWER0.6° lowest night in 44 years, NASA POWER°C · day and nightcold quarter0100200300400mm rainDLI 26–33RH 61–67%JanFebMarAprMayJunJulAugSepOctNovDec
day night rain medians and 10th–90th percentile across 68 habitat cells, CHELSA cold quarter: the three months around the coldest month's mean nightly low extremes over 44 years at a typical spot in the range, from NASA POWER, marked at the edge, in no month DLI, mol/m²/dayRH %each on its own scale
Figures by month
JanFebMarAprMayJunJulAugSepOctNovDec
Day °C18 / 15–1918 / 16–1918 / 16–1917 / 15–1817 / 15–1816 / 15–1817 / 14–1917 / 15–2018 / 16–2017 / 15–1917 / 15–1817 / 15–19
Night °C8 / 7–109 / 7–109 / 7–119 / 8–119 / 8–119 / 7–118 / 6–118 / 6–118 / 6–109 / 7–109 / 7–108 / 7–10
Rain mm58 / 40–11381 / 56–150119 / 85–197171 / 118–273161 / 112–301107 / 64–24390 / 56–24485 / 52–20193 / 60–183164 / 117–268155 / 119–25383 / 61–148
DLI32 / 30–3433 / 31–3532 / 29–3528 / 24–3326 / 22–3126 / 22–3128 / 25–3231 / 28–3633 / 29–3831 / 28–3529 / 26–3230 / 29–32
RH %63 / 59–6964 / 59–6965 / 61–7067 / 63–7166 / 63–7164 / 60–7162 / 58–7261 / 57–6961 / 57–6764 / 60–6966 / 62–7165 / 60–69
How this section is made
Each figure is the median across the 68 grid cells holding the 175 in-range records, with the 10th–90th percentile span across those cells after the slash where it differs. A dash is a month one or more of those cells has no figure for in the grid (a variable CHELSA does not carry there), so no median is taken rather than one over fewer cells. Extremes and elevation were read at a typical spot in the range, cell 1684:2131 (5.775, -73.425). Over 44 years there: absolute minimum 0.6 °C, 1st-percentile night 4.5 °C, 99th-percentile day 22.4 °C. Normals: CHELSA V2.1 1981–2010 climatology, 0.05° cells (each the mean of ~36 1 km pixels). Across the range: median and 10th–90th percentile of each month across the 68 distinct grid cells holding 175 of the 175 in-range records; extremes and elevation at the typical cell 1684:2131 (its coldest month's mean nightly low nearest the median across cells); its position is the cell centre. Extremes: NASA POWER (MERRA-2) daily 1981–2024, cell 6.00_-73.125, lapse-corrected +203 m at 6.5 °C/km. Elevation: ETOPO 2022, 2719 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 the cells of the in-range records placed well enough to read one, not at the marker.
Openly licensed records inside the range, framed on where they fall.
NativeColombia · regions are the level-3 units of the World Geographical Scheme for Recording Plant Distributions, as Kew's World Checklist records ranges, some under historical names such as Yugoslavia or Czechoslovakia (how).
Map marker4.702, -74.019 · in the densest population, 213 records (99% of those in range)
Evidence usedThe map marker rests on all 215 georeferenced records inside the native range; the climate across the range on the 175 of them placed to within 10 km; the map shows only the 84 openly licensed ones, which alone would put the marker 1 km away. 1 record outside the WCVP native range not used. 40 in-range records are placed to worse than 10 km, or with no stated accuracy (admitted only as a person's observation to three decimals), and stay on the map but off the climate.
How this section is made
The map marker: the openly licensed record nearest the middle of the densest 1° population of the 215 in-range records; it decides nothing. Records outside the native range, living specimens and records marked introduced are not used; which records count.

Photographs

Ageratina asclepiadea, photograph 1did not loadAgeratina asclepiadea, photograph 2did not loadAgeratina asclepiadea, photograph 3did not loadAgeratina asclepiadea, photograph 4did not loadAgeratina asclepiadea, photograph 5did not loadAgeratina asclepiadea, photograph 6did not load

Photographs: (c) julianazuluaga-carrero, some rights reserved (CC BY-SA) (4); (c) Nicolás Baresch Uribe, some rights reserved (CC BY) (2).

Similar habitat climate The 6 nearest by mean daily high, mean nightly low and rain, month by month. How.

Dendrophorbium americanum Dendrophorbium americanum Asteraceae Photo: CC BY, Nicolás Baresch UribeBidens rubifolia Bidens rubifolia Asteraceae Photo: CC BY, Nicolás Baresch UribeEcheveria bicolor Echeveria bicolor Crassulaceae Photo: CC BY, Laurimar SepulvedaMasdevallia coriacea Masdevallia coriacea Orchidaceae Photo: CC BY, Eric SchmidtBaccharis bogotensis Baccharis bogotensis Asteraceae Photo: CC BY, Nicolás Baresch UribeTelipogon nervosus Telipogon nervosus Orchidaceae Photo: CC BY, Nicolás Baresch Uribe

Other Ageratina 20 in the reference

Ageratina adenophora Ageratina adenophora Mexican devil Photo: CC BY, Andrew ThornhillAgeratina altissima Ageratina altissima White snakeroot Photo: CC0, author not statedAgeratina ampla Ageratina ampla Asteraceae Photo: CC BY, Nicolás Baresch UribeAgeratina apollinairei Ageratina apollinairei Asteraceae Photo: CC BY, Nicolás Baresch UribeAgeratina aromatica Ageratina aromatica Lesser snakeroot Photo: CC BY, Shelby Lyn SandersAgeratina glabrata Ageratina glabrata Asteraceae Photo: CC BY, Brandon CorderAgeratina glechonophylla Ageratina glechonophylla Asteraceae Photo: CC BY, Bruno AvilezAgeratina gracilis Ageratina gracilis Asteraceae Photo: CC0, author not statedAgeratina grandifolia Ageratina grandifolia Asteraceae Photo: CC BY, Carlos Domínguez-RodríguezAgeratina havanensis Ageratina havanensis Havana snakeroot Photo: CC BY, Reid HardinAgeratina herbacea Ageratina herbacea Desert ageratina Photo: CC BY, Jo RobertsAgeratina jucunda Ageratina jucunda Hammock snakeroot Photo: CC BY, Melissa Meadows all 21 ›

Names & registers

Also known as Ageratina humboldtii; Ageratina pomaderrifolia; Cacalia asclepiadea; Cacalina asclepiadea; Eupatorium coperense and 2 more. (GBIF Backbone)

GBIFPOWOIPNIWFOWikidataiNaturalist

The record

Family
Asteraceae
Described by
(L.f.) R.M.King & H.Rob.
Native to
Colombia
Wild records
215 in range · 84 open

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 2026-10-21
GBIF species record gbif.species answeredasked 2026-10-21GBIF's key 5400468 is Ageratina asclepiadea (L.fil.) R.M.King & H.Rob.; the page links Kew's Ageratina asclepiadea (L.f.) R.M.King & H.Rob., and the name is cited as Kew cites it
GBIF synonyms gbif.synonyms answeredasked 2026-10-21
GBIF common names gbif.vernacular answeredasked 2026-10-21names fetched 2026-10-21
WCVP native range wcvp.distribution answeredas of 2026-06-04
GBIF occurrence records gbif.occurrences answeredas of 2026-10-21GBIF occurrence download https://doi.org/10.15468/dl.hbdw64, of 2026-10-21
Habitat climate climate answeredasked 2026-10-21
Daily extremes (NASA POWER) climate.extremes answeredasked 2026-10-21NASA POWER (MERRA-2) daily 1981–2024, cell 6.00_-73.125, lapse-corrected +203 m at 6.5 °C/km
Wikidata wikidata answeredasked 2026-10-21IPNI and POWO linked by Kew's number for Ageratina asclepiadea (L.f.) R.M.King & H.Rob. (the item's: IPNI 942793-1, POWO 271815-2)
Wikipedia wikipedia nothing to reportasked 2026-10-21
iNaturalist photographs, wild inat.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 2026-10-22
iNaturalist photographs, cultivated inat.photos.cultivated not asked
GBIF media gbif.media answeredasked 2026-10-21none 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 rules
OpenAlex papers openalex not askednot yet asked for this reference; a later fill takes the papers from OpenAlex's snapshot

Every 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 32 datasets via GBIF.org; each carries its own licence.

Cultifolio

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