




14 photographs › At a glance
- Jan, shaded
- Feb
- Mar
- Apr, shaded
- May, shaded
- Jun, shaded
- Jul
- Aug
- Sep
- Oct, shaded
- Nov, shaded
- Dec, shaded
About the genus · Antirrhinum
Antirrhinum is a genus of plants in the Plantaginaceae family, commonly known as dragon flowers or snapdragons because of the flowers' fancied resemblance to the face of a dragon that opens and closes its mouth when laterally squeezed. They are also sometimes called toadflax or dog flower. They are native to rocky areas of Europe, the United States, Canada, and North Africa. More on Wikipedia ›
Quoted from Wikipedia, "Antirrhinum", CC BY-SA 4.0.
Cultivation
Seasons
The rain rule reads a rainy season and no growing season: 70% of the median year's rain (459 mm of 640 mm) falls in October to January and April to June, the cooler part of the year, but the mean nightly low is below freezing in February, so the rule reads no growing season from it. Months are the habitat's, northern hemisphere; shifted six months for a southern-hemisphere collection: April to July and October to December.
Rain
640 mm in the median year at the habitat, 459 mm of it October to January and April to June. Wettest month December at 77 mm, driest month July at 20 mm. Across the grid cells of the range the year's total runs 511 mm to 891 mm, the 10th to 90th percentile of each cell's own year. The median of the cells' own yearly totals, 633 mm, is the year's rain at the top of the page; the 640 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: 12 to 48 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 11, 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 -6.4 °C, the absolute minimum -13.4 °C, 3,922 frost nights in 44 years, 89.1 a year (NASA POWER daily minima). Warmest: the 99th-percentile day is 35.1 °C. Monthly means: the coldest month's mean nightly low -0.9 °C in January (across the grid cells of the range -2.9 °C to 0.1 °C), the warmest month's mean daily high 28.3 °C in July (median year across the grid cells of the range, CHELSA). Cold floor: -6.4 °C, which is the 1st-percentile night over 44 years at a typical spot in the range (NASA POWER).
Relative humidity at the habitat: 47 to 63% 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 +28 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, northern hemisphere
Mean daily high from 7 °C in Jan and Dec to 28 °C in Jul and Aug; mean nightly low from -1 °C in Jan and Feb to 14 °C in Jul and Aug. The cold quarter, Dec to Feb, is the three months around the coldest month's mean nightly low, centred on the 2 months in a row that tie for it. 640 mm of rain in the median year (the twelve monthly medians added), the wettest month Dec. The bands show the 10th to 90th percentile across 123 habitat cells. Over 44 years at a typical spot in the range (NASA POWER) the absolute minimum was -13.4 °C and the 99th-percentile day 35.1 °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 | 7 / 5–8 | 8 / 6–10 | 12 / 10–14 | 14 / 11–16 | 18 / 15–20 | 24 / 21–26 | 28 / 25–30 | 28 / 25–29 | 23 / 20–24 | 17 / 14–18 | 11 / 8–12 | 7 / 5–9 |
| Night °C | -1 / -3–0 | -1 / -3–1 | 1 / -1–2 | 3 / 1–4 | 7 / 4–8 | 11 / 9–12 | 14 / 12–16 | 14 / 12–16 | 11 / 9–12 | 7 / 5–8 | 2 / 1–4 | 0 / -2–1 |
| Rain mm | 50 / 36–78 | 46 / 33–72 | 42 / 32–63 | 73 / 60–99 | 75 / 63–95 | 49 / 39–63 | 20 / 14–24 | 26 / 17–33 | 47 / 36–60 | 71 / 57–105 | 64 / 47–94 | 77 / 52–121 |
| DLI | 14 / 13–15 | 20 / 19–21 | 29 / 29–30 | 36 / 35–37 | 41 / 40–41 | 46 / 46–47 | 48 / 48–49 | 42 / 41–43 | 32 / 32–33 | 22 / 21–23 | 15 / 14–16 | 12 / 11–12 |
| RH % | 63 / 61–64 | 60 / 58–61 | 56 / 55–58 | 56 / 55–58 | 55 / 53–57 | 51 / 50–53 | 47 / 46–49 | 49 / 47–50 | 53 / 51–54 | 58 / 57–60 | 62 / 60–63 | 63 / 62–64 |
How this section is made
Natural habitat
How this section is made
Photographs
Photographs: (c) Jorge Íñiguez, some rights reserved (CC BY) (6).
Related
Similar habitat climate The 6 nearest by mean daily high, mean nightly low and rain, month by month. How.
Cistus laurifolius Laurel-leaved Cistus Photo: CC BY, Milan Chytrý Pinguicula mundi Lentibulariaceae
Armeria alliacea Plumbaginaceae Photo: CC BY, Karim Haddad
Leucanthemopsis pallida Asteraceae Photo: CC BY, Santiago Martín-Bravo
Astragalus granatensis Fabaceae Photo: CC BY, Christoph MoningOther Antirrhinum 13 in the reference
Antirrhinum australe Plantaginaceae Photo: CC0, author not stated
Antirrhinum braun-blanquetii Plantaginaceae Photo: CC BY, Sylvain Montagner
Antirrhinum charidemi Plantaginaceae Photo: CC BY, Olivier Argagnon
Antirrhinum cirrhigerum Plantaginaceae Photo: CC BY, Hannes Oberreiter
Antirrhinum graniticum Plantaginaceae Photo: CC BY, Gonzalo Ganda Álvarez
Antirrhinum hispanicum Plantaginaceae Photo: CC BY, frangp
Antirrhinum latifolium Large Snapdragon Photo: CC BY, Daniel Cahen
Antirrhinum linkianum Plantaginaceae Photo: CC0, citi2024
Antirrhinum majus Garden snapdragon Photo: CC BY, Oleksii Vasyliuk
Antirrhinum sempervirens Plantaginaceae Photo: CC BY, Flavien Saboureau
Antirrhinum siculum Sicilian Snapdragon Photo: CC BY, Cenaida all 14 ›Names & registers
Also known as Antirrhinum sempervirens subsp. densiflorum; Antirrhinum sempervirens subsp. pulverulentum; Antirrhinum sempervirens var. densiflorum; Antirrhinum sempervirens var. glabrescens. (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 41.00_-2.500, lapse-corrected +28 m at 6.5 °C/kmwikidata answeredasked 2026-10-21wikipedia nothing to reportasked 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 22 datasets via GBIF.org; each carries its own licence.






