9 photographs › At a glance
- Jan
- Feb
- Mar
- Apr
- May, shaded
- Jun, shaded
- Jul
- Aug, shaded
- Sep, shaded
- Oct, shaded
- Nov, shaded
- Dec
From few records: 3 records in 3 grid cells. The records.
Summary
Tolumnia guianensis is a species of orchid native to Hispaniola.
Quoted from Wikipedia, "Tolumnia guianensis", CC BY-SA 4.0.
Cultivation
Grouped as an orchid, listed under the genus Tolumnia in the archetype table, and Kew describes it as “pseudobulbous epiphyte”.
Seasons
The rain rule reads a summer growing season: 70% of the median year's rain (1,042 mm of 1,471 mm) falls in May to June and August to November, warmer than the year (wet-season mean 23.9 °C against a yearly mean of 23.0 °C). Months are the habitat's, northern hemisphere; shifted six months for a southern-hemisphere collection: February to May and November to December.
Rain
1,471 mm in the median year at the habitat, 1,042 mm of it May to June and August to November. Wettest month May at 236 mm, driest months (2 at 42 mm). Across the grid cells of the range the year's total runs 1,400 mm to 1,556 mm, the 10th to 90th percentile of each cell's own year. The median of the cells' own yearly totals, 1,532 mm, is the year's rain at the top of the page; the 1,471 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: 30 to 42 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 27, the highest 90th-percentile month 44).
Warmth and air
Coldest: the 1st-percentile night over 44 years at a typical spot in the range is 15.1 °C, the absolute minimum 12.5 °C, no frost in 44 years (NASA POWER daily minima). Warmest: the 99th-percentile day is 33.7 °C. Monthly means: the coldest month's mean nightly low 16.7 °C in February (across the grid cells of the range 14.5 °C to 17.0 °C), the warmest month's mean daily high 30.5 °C in August (median year across the grid cells of the range, CHELSA). Cold floor: 15.1 °C, which is the 1st-percentile night over 44 years at a typical spot in the range (NASA POWER).
Relative humidity at the habitat: 62 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 +262 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 genus Tolumnia in the archetype table, and Kew describes it as “pseudobulbous epiphyte”. 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
From few records: this habitat climate is read from 3 records in 3 grid cells; a page says so under 12 records or 5 cells, and shows the figures as read.
Habitat months, northern hemisphere
Mean daily high from 25 °C in Jan to 31 °C in Aug; mean nightly low from 17 °C in Jan, Feb, Mar and Dec to 20 °C in Jun, Jul, Aug, Sep and Oct. The cold quarter, Dec to Feb, is the three months around the coldest month's mean nightly low, centred on the 4 months in a row that tie for it. 1,471 mm of rain in the median year (the twelve monthly medians added), the wettest month May. The bands show the 10th to 90th percentile across 3 habitat cells. Over 44 years at a typical spot in the range (NASA POWER) the absolute minimum was 12.5 °C and the 99th-percentile day 33.7 °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 | 25 / 22–27 | 26 / 22–28 | 27 / 23–28 | 27 / 23–29 | 28 / 24–29 | 29 / 25–30 | 30 / 25–31 | 31 / 25–31 | 30 / 25–30 | 29 / 24–29 | 27 / 23–28 | 26 / 22–27 |
| Night °C | 17 / 15–17 | 17 / 15–17 | 17 / 15–18 | 18 / 16–19 | 19 / 17–20 | 20 / 18–21 | 20 / 18–21 | 20 / 18–21 | 20 / 18–21 | 20 / 18–20 | 19 / 17–19 | 17 / 15–18 |
| Rain mm | 42 / 35–79 | 42 / 40–61 | 72 / 58–92 | 116 / 98–162 | 236 / 179–247 | 174 / 146–184 | 93 / 87–142 | 162 / 118–185 | 170 / 156–196 | 183 / 176–185 | 117 / 100–133 | 64 / 40–80 |
| DLI | 31 / 29–31 | 35 / 32–36 | 39 / 36–39 | 42 / 39–42 | 40 / 38–41 | 41 / 41–43 | 42 / 41–44 | 41 / 40–42 | 37 / 37–39 | 33 / 33–35 | 31 / 29–31 | 30 / 27–30 |
| RH % | 64 / 63–65 | 64 / 62–64 | 63 / 62–65 | 65 / 63–66 | 65 / 64–67 | 63 / 63–66 | 62 / 62–65 | 63 / 62–65 | 65 / 63–66 | 67 / 65–67 | 66 | 65 / 64–65 |
How this section is made
Natural habitat
How this section is made
Photographs
Photographs: Yolanda M. Leon, CC0, iNaturalist via GBIF (6).
Related
Similar habitat climate The 6 nearest by mean daily high, mean nightly low and rain, month by month. How.
Tabebuia berteroi Hispaniolan Rosy Trumpet Tree Photo: CC BY, Mario Guzmán
Psychilis atropurpurea Orchidaceae Photo: CC BY, J. L. Gómez-Hechavarría Agave underwoodii Asparagaceae 
Stenorrhynchos speciosum Orchidaceae Photo: CC0, author not stated Epidendrum neoporpax Orchidaceae 
Prunus occidentalis Western cherry laurel Photo: CC0, author not statedOther Tolumnia 4 in the reference
Tolumnia henekenii Orchidaceae Photo: CC BY, Mario Guzmán
Tolumnia scandens Orchidaceae Photo: CC BY, Mario Guzmán
Tolumnia urophylla Dancing Lady Photo: CC0, Quentin Groom
Tolumnia variegata Harlequin dancing-lady orchid Photo: CC BY, Wes Gapp Names & registers
Also known as Oncidium desertorum; Oncidium desertorum var. alborubrum; Oncidium desertorum var. album; Oncidium desertorum var. aureorubrum; Oncidium guianense and 13 more. (GBIF Backbone)
Registers not checked
Wikidata did not answer when this page was built, so the links it gives (POWO, IPNI, World Flora Online, Wikipedia) were not checked; any shown here are kept from an earlier build. Not asked, or not answered, is not "none": nothing here claims there is none. Why the site says it this way.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 answeredas of 2026-10-21GBIF occurrence download https://doi.org/10.15468/dl.hbdw64, of 2026-10-21climate answeredasked 2026-10-22climate.extremes answeredasked 2026-10-22NASA POWER (MERRA-2) daily 1981–2024, cell 19.50_-70.625, lapse-corrected +262 m at 6.5 °C/kmwikidata failedasked 2026-10-22query.wikidata.org 502 (batched: Wikidata's query service, 100 GBIF keys)wikipedia answeredasked 2026-10-22inat.taxon not askedinat.photos.wild not askedinat.photos.cultivated not askedgbif.media answeredasked 2026-10-22commons nothing to reportasked 2026-10-22openalex 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 7 datasets via GBIF.org; each carries its own licence.