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Drosera meristocaulis Maguire & Wurdack

Droseraceae

Climate known Photographs not checked Carnivorous plant

Every figure on this page is derived from public data by a stated rule and says its source; nothing here is written by a person or a model, except the Wikipedia passage, which is quoted and marked as such. How it is made.

Summary

Drosera meristocaulis is a perennial species in the carnivorous plant genus Drosera, the only member of the subgenus Meristocaulis. It is a small, rosette- and branched stem-forming sundew that has many morphological affinities to the Australian pygmy sundews. D. meristocaulis is wholly endemic to Pico da Neblina, an isolated mountain on the Brazil-Venezuela border.

Text from Wikipedia, “Drosera meristocaulis”, CC BY-SA 4.0, quoted as written. Kept separate from everything derived here.

About the genus · Drosera

Drosera, which is commonly known as the sundews, is one of the largest genera of carnivorous plants, with at least 194 species. These members of the family Droseraceae lure, capture, and digest insects using stalked mucilaginous glands covering their leaf surfaces. The insects are used to supplement the poor mineral nutrition of the soil in which the plants grow. More on Wikipedia ›

The opening of Wikipedia, “Drosera”, CC BY-SA 4.0, quoted as written.

Family

Droseraceae

Described by

Maguire & Wurdack

Native to

Venezuela

Wild records

5 in range· 5 open

At a glance

Warmest month

24°C

Oct, mean day; nights 17 °C (CHELSA)

Rain

5009mm/yr

12 wet months · peak May 581 mm (CHELSA)

Light

20–30DLI

mol/m²/day, winter to summer, open sky (CHELSA shortwave)

In short condensed by rule from the cultivation cards · not written by a person

Grouped as a carnivorous plant by the genus Drosera, which is reliably one kind of plant (archetype table). Rain rule: no season, 70% of the rain takes 8 months (January to August at the habitat (not shifted)). Habitat rain 5009 mm a year, wettest May at 581 mm, driest November at 302 mm (habitat calendar, northern hemisphere). Open sky over the habitat: 20 to 30 mol/m²/day. Cold floor 14.2 °C (1st-percentile habitat night, NASA POWER).

Each sentence is one card's own one-line form, written by the same rule as the card (Its year, Rain, Light, Temperature); the note cannot say what a card does not. Months are given for the northern hemisphere (set your site in Settings to change this), and the habitat's own alongside. The cards · the figures.

Cultivation

Grouped as a carnivorous plant by the genus Drosera, which is reliably one kind of plant (archetype table). The table holds no figure for this group, which spans too much for one minimum; the cold floor is the habitat's alone, and no prose comes from the table.

Its year Rain rule: no season, 70% of the rain takes 8 months (January to August at the habitat (not shifted)).

This species’ habitat figures, and what two fixed rules read from them.

The rain rule reads no season: 70% of the year's rain (3664 mm of 5009 mm) takes 8 months, January to August. Mean temperature moves 1.1 °C between the warmest and coldest month. Months are the habitat's, northern hemisphere, within 10° of the equator; with no thermal season there there is no season to reverse, so they are not shifted for a collection elsewhere.

Read from the median year of CHELSA monthly rainfall and mean temperature across the envelope cells: 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 gives a season to reverse. A reading of the curves, not an observation of the plant.

Rain Habitat rain 5009 mm a year, wettest May at 581 mm, driest November at 302 mm (habitat calendar, northern hemisphere).

This species’ habitat figures, with their source.

5009 mm a year at the habitat, 3664 mm of it January to August. Wettest month May at 581 mm, driest November at 302 mm. Across the envelope cells the year's total runs 1982 mm to 5181 mm (10th to 90th percentile of each cell's own year) (median year across the envelope cells, CHELSA; habitat calendar, northern hemisphere).

CHELSA monthly precipitation, median year across the envelope cells. The rain that falls where the species is recorded; nothing about how the plant takes water.

Light Open sky over the habitat: 20 to 30 mol/m²/day.

This species’ habitat figures, with their source.

Open sky over the habitat: 20 to 30 mol/m²/day across the year (daily light integral, median year across the envelope cells, CHELSA; the lowest 10th-percentile month across the cells is 20, the highest 90th-percentile month 39).

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.

Warmth and air Cold floor 14.2 °C (1st-percentile habitat night, NASA POWER).

This species’ habitat figures, with their source.

Temperature

Coldest: the 1st-percentile night over 44 years at the typical cell is 14.2 °C, the absolute minimum 11.6 °C, no frost in 44 years (NASA POWER daily minima). Warmest: the 99th-percentile day is 26.7 °C. Monthly means: coldest night 15.9 °C in July (across the envelope cells 13.9 °C to 21.5 °C), warmest day 24.3 °C in October (median year across the envelope cells, CHELSA). Cold floor: 14.2 °C, which is the 1st-percentile night over 44 years at the typical cell (NASA POWER).

NASA POWER daily minima and maxima 1981–2024 at the typical cell, lapse-corrected to its elevation; CHELSA monthly means, median year across the envelope cells, CHELSA. The cold floor is the figure named in its sentence. Not a measured survival limit for any plant in a pot.

Humidity

Relative humidity at the habitat: 70 to 74% across the year (monthly means, median year across the envelope cells, CHELSA). A figure about the air, saying nothing about how the plant takes water.

CHELSA relative humidity, median year across the envelope cells.

The figures the cards read from are in Climate below, and where they came from in Natural habitat.

Climate across the habitat

day night rain 10th–90th percentile across 5 habitat cells cold quarter: the three months around the coldest night extremes over 44 years at the typical cell, marked at the edge: undated DLI, mol/m²/dayRH %each on its own scale

Figures by month

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Day °C	24 / 21–31	24 / 22–32	24 / 22–33	24 / 22–32	23 / 21–30	22 / 21–29	22 / 20–28	23 / 21–29	24 / 22–30	24 / 22–30	24 / 22–30	24 / 22–30
Night °C	17 / 14–22	17 / 15–22	17 / 15–23	17 / 15–24	17 / 15–23	16 / 15–22	16 / 14–22	16 / 14–22	16 / 14–22	17 / 15–22	17 / 15–22	17 / 14–22
Rain mm	375 / 14–386	382 / 15–395	442 / 22–454	470 / 89–484	581 / 210–595	509 / 356–522	477 / 434–495	428 / 351–448	358 / 229–375	331 / 133–347	302 / 83–315	354 / 40–365
DLI	29 / 27–33	28 / 27–35	27 / 26–39	23 / 22–35	20 / 20–30	22 / 21–28	25 / 23–29	29 / 27–32	30 / 30–35	30 / 29–33	29 / 27–31	28 / 26–30
RH %	70 / 57–72	70 / 55–72	70 / 53–72	72 / 57–73	73 / 65–75	74 / 69–75	73 / 69–74	71 / 69–73	71 / 67–72	70 / 66–72	70 / 65–72	71 / 62–73

Each figure is the median across the 5 grid cells holding the 5 in-range records, with the 10th–90th percentile span across those cells after the slash where it differs. Extremes and elevation were read at the typical cell 1781:2279 (0.925, -66.025). Over 44 years there: absolute minimum 11.6 °C, 1st-percentile night 14.2 °C, 99th-percentile day 26.7 °C. Normals: CHELSA V2.1 1981–2010 climatology, 0.05° cells (each the mean of ~36 1 km pixels). Envelope: median and 10th–90th percentile of each month across the 5 distinct grid cells holding the 5 in-range records; extremes and elevation at the typical cell 1781:2279 (its coldest month's mean night nearest the median across cells); its position is the cell centre. Extremes: NASA POWER (MERRA-2) daily 1981–2024, cell 1.00_-66.250, lapse-corrected +957 m at 6.5 °C/km. Elevation: ETOPO 2022, 1154 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 every in-range record's cell, not at the marker.

Openly licensed records inside the range, framed on where they fall.

NativeVenezuela

Kew's description“subshrub” · “wet tropical”· quoted from WCVP, RBG Kew (CC BY 4.0); not derived here

Map marker0.908, -66.042 · in the densest population, 3 records (60% of those in range)

Evidence usedThe map marker and the climate envelope rest on all 5 georeferenced records inside the native range, all openly licensed and shown on the map. 1 record outside the range (gardens, roadsides, misidentifications) ignored. Under a dozen records: treat the map and the climate as indicative.

The map markerthe map marker: the openly licensed record nearest the middle of the densest 1° population of the 5 in-range records; it decides nothing.

Papers naming this species

Works whose title or abstract names Drosera meristocaulis, most cited first, from OpenAlex (CC0). A mention, not a cultivation source: nothing on this page is drawn from them.

Is Drosera meristocaulis a pygmy sundew? Evidence of a long-distance dispersal between Western Australia and northern South America

Fernando Rivadavia, Vitor F. O. Miranda, Gert Hoogenstrijd, Fábio Pinheiro (2012) · Annals of Botany

Occurrence Download