61 photographs › At a glance
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Summary
Calytrix alpestris, commonly known as snow-myrtle, is a species of flowering plant in the myrtle family Myrtaceae and is endemic to southern continental Australia. It is a shrub with wiry branchlets, linear to narrowly egg-shaped or narrowly lance-shaped leaves and clusters of white flowers with 14 to 37 white stamens in a single row.
Quoted from Wikipedia, "Calytrix alpestris", CC BY-SA 4.0.
Cultivation
Seasons
The rain rule reads a winter growing season: 70% of the median year's rain (360 mm of 477 mm) falls in April to October, cooler than the year (wet-season mean 12.1 °C against a yearly mean of 15.2 °C). Months are the habitat's, southern hemisphere; shifted six months for a northern-hemisphere collection: October to April.
Rain
477 mm in the median year at the habitat, 360 mm of it April to October. Wettest month August at 68 mm, driest month February at 17 mm. Across the grid cells of the range the year's total runs 385 mm to 572 mm, the 10th to 90th percentile of each cell's own year. The median of the cells' own yearly totals, 476 mm, is the year's rain at the top of the page; the 477 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: 13 to 49 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 12, the highest 90th-percentile month 49).
Warmth and air
Coldest: the 1st-percentile night over 44 years at a typical spot in the range is 1.7 °C, the absolute minimum -2.2 °C, 18 frost nights in 44 years (NASA POWER daily minima). Warmest: the 99th-percentile day is 41.0 °C. Monthly means: the coldest month's mean nightly low 6.1 °C in July (across the grid cells of the range 5.7 °C to 7.3 °C), the warmest month's mean daily high 28.2 °C in February (median year across the grid cells of the range, CHELSA). Cold floor: 1.7 °C, which is the 1st-percentile night over 44 years at a typical spot in the range (NASA POWER).
Relative humidity at the habitat: 51 to 61% 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 -19 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.
Climate across the habitat
Habitat months, southern hemisphere
Mean daily high from 13 °C in Jul to 28 °C in Jan and Feb; mean nightly low from 6 °C in Jul to 15 °C in Jan and Feb. The cold quarter, Jun to Aug, is the three months around the coldest month's mean nightly low. 477 mm of rain in the median year (the twelve monthly medians added), the wettest month Aug. The bands show the 10th to 90th percentile across 187 habitat cells. Over 44 years at a typical spot in the range (NASA POWER) the absolute minimum was -2.2 °C and the 99th-percentile day 41.0 °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 | 28 / 25–29 | 28 / 26–29 | 25 / 23–26 | 21 / 20–22 | 17 / 17–18 | 14 / 14–15 | 13 / 13–14 | 15 / 14–15 | 17 / 16–18 | 20 / 18–21 | 23 / 21–24 | 26 / 23–27 |
| Night °C | 15 / 14–16 | 15 / 14–16 | 13 / 13–14 | 11 / 10–11 | 9 / 9–10 | 7 / 7–8 | 6 / 6–7 | 7 / 6–8 | 8 / 8–9 | 10 / 9–10 | 12 / 11–12 | 13 / 13–14 |
| Rain mm | 18 / 16–24 | 17 / 14–19 | 22 / 17–25 | 30 / 25–37 | 47 / 33–59 | 61 / 46–78 | 63 / 46–80 | 68 / 51–80 | 53 / 41–60 | 38 / 32–47 | 30 / 28–34 | 30 / 28–35 |
| DLI | 49 / 48–49 | 44 / 43–45 | 34 / 33–35 | 24 / 23–25 | 16 / 15–17 | 13 / 12–13 | 14 / 13–15 | 19 / 18–20 | 27 / 26–27 | 36 / 35–37 | 43 / 42–44 | 47 / 46–48 |
| RH % | 51 / 49–54 | 51 / 49–54 | 53 / 51–55 | 54 / 54–56 | 58 / 58–60 | 61 / 60–62 | 61 / 59–62 | 58 / 58–60 | 57 / 56–59 | 55 / 54–57 | 53 / 51–55 | 52 / 50–55 |
How this section is made
Natural habitat
How this section is made
Photographs
Photographs: (c) krumpianking, some rights reserved (CC BY) (3); (c) grampianshiker, some rights reserved (CC BY) (3).
Related
Similar habitat climate The 6 nearest by mean daily high, mean nightly low and rain, month by month. How.
Allocasuarina pusilla Dwarf she-oak Photo: CC BY, Lorraine Phelan
Hakea mitchellii Desert Hakea Photo: CC BY, Rosalie Lawrence
Kunzea pomifera Munthari Photo: CC BY-SA, Greg Tasney
Acacia farinosa Mealy wattle Photo: CC BY, David Sando
Allocasuarina muelleriana Slaty sheoak Photo: CC BY, herbie-hancock
Prostanthera eurybioides Monarto Mint-bush Photo: CC BY, David SandoOther Calytrix 3 in the reference
Calytrix fraseri Pink summer calytrix Photo: CC BY, Rob Beattie
Calytrix hirta Myrtaceae Photo: CC BY, Belinda Forbes
Calytrix tetragona Common fringe myrtle Photo: CC BY-SA, Greg Tasney Names & registers
Also known as Genetyllis alpestris; Lhotskya alpestris; Lhotskya alpestris var. bracteosa; Lhotskya genethylloides; Lhotskya genethylloides var. bracteosa and 1 more. (GBIF Backbone)
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 2026-10-21
gbif.species answeredasked 2026-10-21gbif.synonyms answeredasked 2026-10-21gbif.vernacular answeredasked 2026-10-21names fetched 2026-10-21wcvp.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 2026-10-21climate.extremes answeredasked 2026-10-21NASA POWER (MERRA-2) daily 1981–2024, cell -36.00_140.625, lapse-corrected -19 m at 6.5 °C/kmwikidata answeredasked 2026-10-21wikipedia answeredasked 2026-10-21inat.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 2026-10-22inat.photos.cultivated not askedgbif.media answeredasked 2026-10-21openalex 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 20 datasets via GBIF.org; each carries its own licence.