Trimezia steyermarkii R.C.Foster

Trimezia, yellow walking iris

Climate known 49 photographs Bulb, tuber or caudex

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

Trimezia steyermarkii is a species of flowering plant in the family Iridaceae, native to southern Mexico, Central America, Colombia, and Venezuela. Plants are up to 150 cm tall, with rhizomes up to 2–4 cm long and 2–3 cm wide; leaves are lanceolate, 60–150 cm long by 2 cm wide; flowers are yellow with brown spots. In countries like Colombia and Venezuela, a name that is often given to this plant is "Hand of God" because of the three flower petals.

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

About the genus · Trimezia

Trimezia is a genus of flowering plants in the family Iridaceae, native to the warmer parts of southern Mexico, Central America, South America, Florida, and the West Indies. Trimezia is placed in the tribe Trimezieae. The division of the tribe into genera has varied considerably. More on Wikipedia ›

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

Family

Iridaceae

Described by

R.C.Foster

Native to

Mexico Gulf, Mexico Southwest, Mexico Southeast +8

Wild records

507 in range· 110 open

At a glance

Warmest month

28°C

Apr, mean day; nights 19 °C (CHELSA)

Rain

2761mm/yr

12 wet months · peak Sep 348 mm (CHELSA)

Light

26–37DLI

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 bulb, tuber or caudex by Iridaceae, which is usually but not always one kind of plant (archetype table). Rain rule: a sharp rainy season, May to October at the habitat (not shifted); the temperature curve is flat (2.5 °C of range), so no growing season is inferred. Habitat rain 2761 mm a year, wettest September at 348 mm, driest February at 76 mm (habitat calendar, northern hemisphere). Open sky over the habitat: 26 to 37 mol/m²/day. Cold floor 14.4 °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 bulb, tuber or caudex by Iridaceae, which is usually but not always 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: a sharp rainy season, May to October at the habitat (not shifted); the temperature curve is flat (2.5 °C of range), so no growing season is inferred.

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

The rain rule reads a sharp season: 70% of the year's rain (1988 mm of 2761 mm) falls in May to October. The temperature curve is flat, 2.5 °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; with a flat temperature curve 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 2761 mm a year, wettest September at 348 mm, driest February at 76 mm (habitat calendar, northern hemisphere).

This species’ habitat figures, with their source.

2761 mm a year at the habitat, 1988 mm of it May to October. Wettest month September at 348 mm, driest February at 76 mm. Across the envelope cells the year's total runs 1456 mm to 4541 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: 26 to 37 mol/m²/day.

This species’ habitat figures, with their source.

Open sky over the habitat: 26 to 37 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 23, the highest 90th-percentile month 42).

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 14.4 °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 14.4 °C, the absolute minimum 11.4 °C, no frost in 44 years (NASA POWER daily minima). Warmest: the 99th-percentile day is 34.4 °C. Monthly means: coldest night 17.4 °C in January (across the envelope cells 11.5 °C to 22.6 °C), warmest day 27.5 °C in April (median year across the envelope cells, CHELSA). Cold floor: 14.4 °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: 64 to 71% 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 309 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	25 / 20–28	26 / 21–29	27 / 22–30	28 / 23–31	27 / 23–30	26 / 22–29	26 / 22–29	26 / 22–29	26 / 22–29	25 / 21–28	25 / 21–28	24 / 20–28
Night °C	17 / 12–23	18 / 12–23	18 / 13–23	19 / 14–24	20 / 15–24	20 / 15–24	19 / 15–24	20 / 15–24	19 / 15–24	19 / 14–23	18 / 13–23	18 / 12–23
Rain mm	87 / 18–299	76 / 16–234	83 / 21–233	111 / 40–315	301 / 115–485	343 / 175–504	335 / 138–469	329 / 139–529	348 / 184–591	332 / 164–644	256 / 63–466	160 / 31–377
DLI	30 / 25–34	33 / 29–38	37 / 32–41	37 / 30–42	31 / 26–41	30 / 24–38	30 / 24–39	32 / 25–38	30 / 25–35	28 / 23–33	26 / 23–32	27 / 23–32
RH %	66 / 59–72	65 / 58–70	64 / 58–69	64 / 59–71	68 / 61–73	70 / 64–76	70 / 62–76	70 / 62–76	70 / 64–75	71 / 65–76	70 / 63–76	68 / 61–75

Each figure is the median across the 309 grid cells holding the 487 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 1658:2138 (7.075, -73.075). Over 44 years there: absolute minimum 11.4 °C, 1st-percentile night 14.4 °C, 99th-percentile day 34.4 °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 309 distinct grid cells holding the 487 in-range records; extremes and elevation at the typical cell 1658:2138 (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 7.00_-73.125, lapse-corrected -438 m at 6.5 °C/km. Elevation: ETOPO 2022, 1157 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.

NativeMexico Gulf, Mexico Southwest, Mexico Southeast, Costa Rica, El Salvador, Guatemala, Honduras, Nicaragua, Panama, Venezuela, Colombia· introduced: Hawaii, Puerto Rico

Kew's description“tuberous geophyte” · “seasonally dry tropical”· quoted from WCVP, RBG Kew (CC BY 4.0); not derived here

Map marker10.437, -84.708 · in the densest population, 182 records (36% of those in range)

Evidence usedThe map marker and the climate envelope rest on all 507 georeferenced records inside the native range; the map shows only the 110 openly licensed ones, which alone would put the marker 76 km away. 395 records outside the range (gardens, roadsides, misidentifications) ignored. 20 in-range records are placed to worse than 10 km and stay on the map but off the climate.

The map markerthe map marker: the openly licensed record nearest the middle of the densest 1° population of the 507 in-range records; it decides nothing.

Photographs

Photographs: (c) Edoardo Nardelli, some rights reserved (CC BY); (c) portioid, some rights reserved (CC BY); (c) Scott Ward, some rights reserved (CC BY) (3); no rights reserved · CC0; (c) Wes Gapp, some rights reserved (CC BY) (2).

Photographs: iNaturalist did not answer when this page was built; what is shown came from the sources that did.

Papers naming this species

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

Occurrence Download