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Ageratina tinifolia; photograph (c) desertnaturalist, some rights reserved (CC BY) CC BY(c) desertnaturalist, some rights reserved (CC BY) · observed growing wild · 2025-02-13

Ageratina tinifolia (Kunth) R.M.King & H.Rob.

Asteraceae · Venezuela, Colombia +1

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Ageratina tinifolia, photograph (c) Carlos Torrente, some rights reserved (CC BY)Ageratina tinifolia, photograph (c) Carlos Torrente, some rights reserved (CC BY)Ageratina tinifolia, photograph (c) Carlos Torrente, some rights reserved (CC BY)Ageratina tinifolia, photograph (c) Carlos Torrente, some rights reserved (CC BY)Ageratina tinifolia, photograph (c) Carlos Torrente, some rights reserved (CC BY)Ageratina tinifolia, photograph (c) Carlos Torrente, some rights reserved (CC BY) 41 photographs ›
Habitat figures
Coldest month, mean nightly low
6.9°C
Jan and Jul at the habitat, not a floor; extremes not used (the weather cell's ground is too far off) CHELSA
Warmest month, mean daily high
16°C
Jan, Feb, Mar, Apr, Aug and Sep at the habitat CHELSA
Rain a year (median across the range)
2,421mm
12 months of 25 mm or more in the median year CHELSA
Open-sky light
25–32DLI
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.

Summary

Ageratina tinifolia is a species of flowering plant in the family Asteraceae. It is found in the Andes from southern Colombia (departments of Antioquia, Boyacá, Caldas, Cauca, Cesar, Cundinamarca, Huila, Meta, Nariño, Norte de Santander, Putumayo, Quindío, Risaralda, Santander and Tolima) to Venezuela, where it typically occurs in the transition zone of high Andean forests and páramo vegetation.

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

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 (1,652 mm of 2,350 mm) falls in March to June and September to November. The temperature curve is flat, 0.8 °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

2,350 mm in the median year at the habitat, 1,652 mm of it March to June and September to November. Wettest month October at 288 mm, driest month January at 93 mm. Across the grid cells of the range the year's total runs 1,321 mm to 3,799 mm, the 10th to 90th percentile of each cell's own year. The median of the cells' own yearly totals, 2,421 mm, is the year's rain at the top of the page; the 2,350 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: 25 to 32 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 23, the highest 90th-percentile month 36).

Warmth and air
Temperature

Monthly means: the coldest month's mean nightly low 6.9 °C in January and July (across the grid cells of the range 4.1 °C to 10.0 °C), the warmest month's mean daily high 15.9 °C in September (median year across the grid cells of the range, CHELSA). Cold floor: none read. The nearest figure is 6.9 °C, the coldest month's mean nightly low, January and July, in the median year (CHELSA); a month's mean of its nightly lows is warmer than the nights a floor is read from. The daily extremes were read at a weather cell whose ground is too far above or below the typical spot to correct for, and are not used.

Humidity

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. CHELSA monthly means, median year across the grid cells of the range. No cold floor is read without a daily extremes series; the coldest month's mean nightly low named in its sentence is not one. 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 tinifolia through the yearWarmest months January, February, March, April, August and September, mean daily high 16 °C; coldest months January and July, mean nightly low 6.9 °C; 2,350 mm of rain in the median year (the twelve monthly medians added). Medians across the range, from CHELSA. Habitat months, northern hemisphere.0°5°10°15°20°25°°C · day and nightcold quarter0100200300400500mm rainDLI 25–32RH 65–69%JanFebMarAprMayJunJulAugSepOctNovDec
day night rain medians and 10th–90th percentile across 174 habitat cells, CHELSA cold quarter: the three months around the coldest month's mean nightly low DLI, mol/m²/dayRH %each on its own scale
Figures by month
JanFebMarAprMayJunJulAugSepOctNovDec
Day °C16 / 12–1916 / 13–1916 / 13–1916 / 13–1915 / 12–1815 / 12–1915 / 12–1916 / 12–2016 / 13–1915 / 13–1915 / 12–1815 / 12–18
Night °C7 / 4–107 / 5–108 / 5–118 / 5–118 / 5–117 / 5–117 / 4–107 / 4–107 / 4–107 / 5–117 / 5–107 / 4–10
Rain mm93 / 45–206127 / 65–227186 / 99–298268 / 150–404275 / 144–451197 / 87–359167 / 74–340158 / 64–324188 / 79–360288 / 143–429250 / 140–382153 / 70–259
DLI32 / 29–3432 / 30–3431 / 29–3427 / 24–3125 / 23–3126 / 23–3228 / 25–3331 / 28–3632 / 28–3629 / 25–3227 / 24–3029 / 27–32
RH %66 / 62–7167 / 62–7168 / 64–7269 / 65–7369 / 64–7368 / 62–7466 / 61–7465 / 59–7166 / 60–7068 / 63–7369 / 65–7367 / 63–72

The daily extremes were not used: the correction for elevation, +1558 m, is beyond the 1,000 m either way that a lapse rate is applied over, so the weather cell's ground is other terrain than the typical spot's. So no cold floor is read for this species, and the coldest month's mean nightly low is not taken as one. What that cell gave, so corrected, over 44 years: absolute minimum -1.6 °C, 1st-percentile night 2.7 °C.

How this section is made
Each figure is the median across the 174 grid cells holding the 311 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 1699:2116 (5.025, -74.175). 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 174 distinct grid cells holding 311 of the 311 in-range records; extremes and elevation at the typical cell 1699:2116 (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 5.00_-74.375, lapse-corrected +1558 m at 6.5 °C/km. Elevation: ETOPO 2022, 3121 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.
NativeVenezuela, Colombia, Ecuador · 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 marker4.964, -74.224 · in the densest population, 328 records (77% of those in range)
Evidence usedThe map marker rests on all 426 georeferenced records inside the native range; the climate across the range on the 311 of them placed to within 10 km; the map shows only the 225 openly licensed ones, which alone would put the marker 16 km away. 115 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 426 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 tinifolia, photograph 1did not loadAgeratina tinifolia, photograph 2did not loadAgeratina tinifolia, photograph 3did not loadAgeratina tinifolia, photograph 4did not loadAgeratina tinifolia, photograph 5did not loadAgeratina tinifolia, photograph 6did not load

Photographs: (c) Carlos Torrente, some rights reserved (CC BY) (6).

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

Chaetogastra grossa Chaetogastra grossa Carmine Princess Flower Photo: CC BY, GERMAN LEONEL SARMIENTO CRUZGravendeelia chamaelepanthes Gravendeelia chamaelepanthes Orchidaceae Photo: CC BY, Daniel MesaMasdevallia strumifera Masdevallia strumifera Goiter Carrying Masdevallia Photo: CC BY, Josh Noseworthy Grammitis colombiensis Polypodiaceae Hypericum juniperinum Hypericum juniperinum Hypericaceae Photo: CC BY, Chase MatheyWeinmannia rollottii Weinmannia rollottii Cunoniaceae Photo: CC BY, GERMAN LEONEL SARMIENTO CRUZ

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 asclepiadea Ageratina asclepiadea Asteraceae Photo: CC BY-SA, julianazuluaga-carreroAgeratina 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 Roberts all 21 ›

Names & registers

Also known as Eupatorium lehmannianum; Eupatorium tinifolium. (GBIF Backbone)

GBIFPOWOIPNIWFOWikidataWikipediaiNaturalist

The record

Family
Asteraceae
Described by
(Kunth) R.M.King & H.Rob.
Native to
Venezuela, Colombia, Ecuador
Wild records
426 in range · 225 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 2026-10-21
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; 2 records within 1 km of a botanic garden, herbarium or zoo left out (2 at a herbarium; Wikidata's list)
Habitat climate climate answeredasked 2026-10-21
Daily extremes (NASA POWER) climate.extremes answeredasked 2026-10-21NASA POWER (MERRA-2) daily 1981–2024, cell 5.00_-74.375, lapse-corrected +1558 m at 6.5 °C/km; read, and set aside: the correction for elevation, +1558 m, is beyond the 1,000 m either way that a lapse rate is applied over, so the weather cell's ground is other terrain than the typical spot's, so no cold floor is shown
Wikidata wikidata answeredasked 2026-10-21
Wikipedia wikipedia answeredasked 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 70 datasets via GBIF.org; each carries its own licence.

Cultifolio

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