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Tessaria integrifolia; photograph (c) Lucas Carbone, some rights reserved (CC BY) CC BY(c) Lucas Carbone, some rights reserved (CC BY) · observed growing wild · 2026-07-05

Tessaria integrifolia Ruiz & Pav.

Asteraceae · Costa Rica, Panama +11

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Tessaria integrifolia, photograph (c) Rocío Esmeralda Pose, some rights reserved (CC BY)Tessaria integrifolia, photograph (c) Rocío Esmeralda Pose, some rights reserved (CC BY)Tessaria integrifolia, photograph (c) Rocío Esmeralda Pose, some rights reserved (CC BY)Tessaria integrifolia, photograph (c) Rocío Esmeralda Pose, some rights reserved (CC BY)Tessaria integrifolia, photograph (c) Rocío Esmeralda Pose, some rights reserved (CC BY)Tessaria integrifolia, photograph (c) Lucas Carbone, some rights reserved (CC BY) 68 photographs ›
Habitat figures
Coldest month, mean nightly low
12.6°C
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
28°C
Jan and Feb at the habitat CHELSA
Rain a year (median across the range)
1,151mm
12 months of 25 mm or more in the median year CHELSA
Open-sky light
24–40DLI
Lowest to highest month (DLI) CHELSA
The year in your months, northern hemisphere
  1. Jan
  2. Feb
  3. Mar
  4. Apr
  5. May
  6. Jun
  7. Jul
  8. Aug
  9. Sep
  10. Oct
  11. Nov
  12. Dec
Wet summers: the rain comes April to October (October to April at the habitat), read as a summer growing season. rain rule, CHELSA
Northern hemisphere unless you set your site. The chart is in the habitat's months.

Cultivation

Seasons

The rain rule reads a summer growing season: 70% of the median year's rain (901 mm of 1,156 mm) falls in October to April, warmer than the year (wet-season mean 22.0 °C against a yearly mean of 20.0 °C). Months are the habitat's, southern hemisphere; shifted six months for a northern-hemisphere collection: April to October.

Rain

1,156 mm in the median year at the habitat, 901 mm of it October to April. Wettest month March at 154 mm, driest months (2 at 35 mm). Across the grid cells of the range the year's total runs 130 mm to 3,240 mm, the 10th to 90th percentile of each cell's own year. The median of the cells' own yearly totals, 1,151 mm, is the year's rain at the top of the page; the 1,156 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: 24 to 40 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 15, the highest 90th-percentile month 47).

Warmth and air
Temperature

Monthly means: the coldest month's mean nightly low 12.6 °C in July (across the grid cells of the range 7.1 °C to 21.1 °C), the warmest month's mean daily high 27.8 °C in January and February (median year across the grid cells of the range, CHELSA). Cold floor: none read. The nearest figure is 12.6 °C, the coldest month's mean nightly low, 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: 60 to 64% 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, southern hemisphere

Habitat climate of Tessaria integrifolia through the yearWarmest months January and February, mean daily high 28 °C; coldest month July, mean nightly low 12.6 °C; 1,156 mm of rain in the median year (the twelve monthly medians added). Medians across the range, from CHELSA. Habitat months, southern hemisphere.5°10°15°20°25°30°35°°C · day and nightcold quarter0100200300400mm rainDLI 24–40RH 60–64%JanFebMarAprMayJunJulAugSepOctNovDec
day night rain medians and 10th–90th percentile across 406 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 °C28 / 19–3228 / 20–3127 / 20–3124 / 19–2922 / 18–2820 / 16–2820 / 15–2822 / 17–2922 / 18–2924 / 19–3026 / 19–3027 / 19–30
Night °C20 / 12–2320 / 12–2319 / 12–2317 / 12–2315 / 10–2214 / 8–2113 / 7–2113 / 8–2114 / 10–2216 / 11–2217 / 12–2219 / 12–23
Rain mm121 / 14–250126 / 25–255154 / 24–277126 / 10–33375 / 4–37549 / 3–35335 / 2–31135 / 2–26061 / 3–274121 / 4–345124 / 4–313129 / 9–265
DLI37 / 30–4636 / 30–4033 / 29–3828 / 23–3725 / 18–3524 / 15–3326 / 17–3530 / 23–3832 / 29–4036 / 30–4340 / 27–4439 / 29–47
RH %62 / 55–7063 / 57–7163 / 59–7064 / 60–7163 / 60–7163 / 58–7162 / 57–7060 / 54–6960 / 54–7061 / 55–7162 / 55–7162 / 55–71

The daily extremes were not used: the record low, 13.7 °C, is warmer than the coldest month's mean nightly low across the range, 12.6 °C, which no night series of the habitat can give. 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 13.7 °C, 1st-percentile night 15.7 °C.

How this section is made
Each figure is the median across the 406 grid cells on land that hold in-range records (666 records in those cells; 2 more cells hold records but no land by the elevation layer, so those records sit at sea and the cells are left out), 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 2134:2151 (-16.725, -72.425). 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 406 distinct grid cells holding 666 of the 668 in-range records (2 further cells with records at sea, by the elevation layer, left out); extremes and elevation at the typical cell 2134:2151 (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 -16.50_-72.500, lapse-corrected -750 m at 6.5 °C/km. Elevation: ETOPO 2022, 85 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.
NativeCosta Rica, Panama, Venezuela, Bolivia, Colombia, Ecuador, Peru, Brazil North, Brazil South, Argentina Northeast, Argentina Northwest, Paraguay, Uruguay · 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 marker-34.463, -58.499 · in the densest population, 276 records (26% of those in range)
Kew's description“shrub or tree” · “seasonally dry tropical” · quoted from WCVP, RBG Kew (CC BY 4.0); not derived here
Evidence usedThe map marker rests on all 1047 georeferenced records inside the native range; the climate across the range on the 666 of them in the land cells it reads, of 668 placed to within 10 km; the map shows only the 611 openly licensed ones, which alone would put the marker 5 km away. 379 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 inside the densest 2° block of the 1047 in-range records; it decides nothing. Records outside the native range, living specimens and records marked introduced are not used; which records count.

Photographs

Tessaria integrifolia, photograph 1did not loadTessaria integrifolia, photograph 2did not loadTessaria integrifolia, photograph 3did not loadTessaria integrifolia, photograph 4did not loadTessaria integrifolia, photograph 5did not loadTessaria integrifolia, photograph 6did not load

Photographs: (c) Rocío Esmeralda Pose, some rights reserved (CC BY) (5); (c) Lucas Carbone, some rights reserved (CC BY).

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

Poecilanthe parviflora Poecilanthe parviflora Fabaceae Photo: CC BY, Fabrício Mil Homens RiellaTalinum paniculatum Talinum paniculatum Jewels of Opar Photo: CC BY, Nicolas OlejnikChromolaena laevigata Chromolaena laevigata Asteraceae Photo: CC BY, lucas.mercioCardiospermum grandiflorum Cardiospermum grandiflorum Balloon vine Photo: CC BY-SA, Greg TasneyPortulaca grandiflora Portulaca grandiflora Rose-moss Photo: CC BY, Guillermo DebandiEugenia uniflora Eugenia uniflora Surinam cherry Photo: CC BY, Patrícia Mees

Other Tessaria 2 in the reference

Tessaria absinthioides Tessaria absinthioides Asteraceae Photo: CC BY, Álvaro Parra ValdiviaTessaria fastigiata Tessaria fastigiata Asteraceae Photo: CC BY-SA, René Alejandro Moscoso Miranda

Names & registers

Also known as Conyza riparia; Gynheteria dentata; Gynheteria incana; Gynheteria salicifolia; Phalacromesus riparia and 7 more. (GBIF Backbone)

Under another author Tessaria absinthioides Griseb. is an older name of this species, not Tessaria absinthioides, a species of the reference. (GBIF Backbone)

GBIFPOWOIPNIWFOWikidataiNaturalist

The record

Family
Asteraceae
Described by
Ruiz & Pav.
Native to
Costa Rica, Panama, Venezuela +10
Wild records
1047 in range · 611 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 2026-10-22
GBIF species record gbif.species answeredasked 2026-10-22
GBIF synonyms gbif.synonyms answeredasked 2026-10-22
GBIF common names gbif.vernacular answeredasked 2026-10-22names fetched 2026-10-22
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; 24 records within 1 km of a botanic garden, herbarium or zoo left out (21 at a botanic garden or arboretum, 3 at a zoo; Wikidata's list)
Habitat climate climate answeredasked 2026-10-22
Daily extremes (NASA POWER) climate.extremes answeredasked 2026-10-22NASA POWER (MERRA-2) daily 1981–2024, cell -16.50_-72.500, lapse-corrected -750 m at 6.5 °C/km; read, and set aside: the record low, 13.7 °C, is warmer than the coldest month's mean nightly low across the range, 12.6 °C, which no night series of the habitat can give, so no cold floor is shown
Wikidata wikidata answeredasked 2026-10-22IPNI and POWO linked by Kew's number for Tessaria integrifolia Ruiz & Pav. (the item's: IPNI 255291-1, POWO 30283369-2)
Wikipedia wikipedia nothing to reportasked 2026-10-22Wikipedia redirects Tessaria integrifolia to Tessaria
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 2026-10-22
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 85 datasets via GBIF.org; each carries its own licence.

Cultifolio

Opening your plants…