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Arctostaphylos montaraensis; photograph (c) Cricket Raspet, some rights reserved (CC BY) CC BY(c) Cricket Raspet, some rights reserved (CC BY) · observed growing wild · 2025-04-26

Arctostaphylos montaraensis Roof

Montara manzanita; Montara Mountain Manzanita

Ericaceae · California

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Arctostaphylos montaraensis, photograph author not stated, no rights reservedArctostaphylos montaraensis, photograph author not stated, no rights reservedArctostaphylos montaraensis, photograph author not stated, no rights reservedArctostaphylos montaraensis, photograph (c) klicklo, some rights reserved (CC BY)Arctostaphylos montaraensis, photograph (c) Cricket Raspet, some rights reserved (CC BY)Arctostaphylos montaraensis, photograph (c) Cricket Raspet, some rights reserved (CC BY) 107 photographs ›
Habitat figures
Coldest month, mean nightly low
7.2°C
Jan at the habitat, not a floor; extremes not used (sea cell) CHELSA
Warmest month, mean daily high
20°C
Sep at the habitat CHELSA
Rain a year (median across the range)
744mm
7 months of 25 mm or more in the median year CHELSA
Open-sky light
14–49DLI
Lowest to highest month (DLI) CHELSA
The year in your months, northern hemisphere
  1. Jan
  2. Feb
  3. Mar
  4. Apr
  5. May
  6. Jun
  7. Jul
  8. Aug
  9. Sep
  10. Oct
  11. Nov
  12. Dec
Wet winters: the rain comes December to March, read as a winter growing season. rain rule, CHELSA
Northern hemisphere unless you set your site. The chart is in the habitat's months.

Summary

Arctostaphylos montaraensis, known by the common name Montara manzanita, is a species of manzanita in the family Ericaceae.

Quoted from Wikipedia, "Arctostaphylos montaraensis", CC BY-SA 4.0.

About the genus · Arctostaphylos

Arctostaphylos is a genus of plants within the family Ericaceae. Many plants within the genus Arctostaphylos are also commonly called manzanitas(/ˌmænzəˈniːtəz/) or bearberries. There are 107 taxa within Arctostaphylos, 106 of which are found in the California Floristic Province. More on Wikipedia ›

Quoted from Wikipedia, "Arctostaphylos", CC BY-SA 4.0.

Cultivation

Seasons

The rain rule reads a winter growing season: 70% of the median year's rain (526 mm of 744 mm) falls in December to March, cooler than the year (wet-season mean 10.5 °C against a yearly mean of 12.9 °C). Months are the habitat's, northern hemisphere; shifted six months for a southern-hemisphere collection: June to September.

Rain

744 mm in the median year at the habitat, 526 mm of it December to March. Wettest month December at 143 mm, driest month July at 2 mm; 2 months under 5 mm. Across the grid cells of the range the year's total runs 695 mm to 822 mm, the 10th to 90th percentile of each cell's own year. The median of the cells' own yearly totals, 744 mm, is the year's rain at the top of the page; the 744 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: 14 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 13, the highest 90th-percentile month 49).

Warmth and air
Temperature

Monthly means: the coldest month's mean nightly low 7.2 °C in January (across the grid cells of the range 6.7 °C to 7.9 °C), the warmest month's mean daily high 19.9 °C in September (median year across the grid cells of the range, CHELSA). Cold floor: none read. The nearest figure is 7.2 °C, the coldest month's mean nightly low, January, in the median year (CHELSA); a month's mean of its nightly lows is warmer than the nights a floor is read from. The daily extremes were read at a weather cell that is mostly sea and are not used.

Humidity

Relative humidity at the habitat: 61 to 69% 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. CHELSA monthly means, median year across the grid cells of the range. No cold floor is read without a daily extremes series; the coldest month's mean nightly low named in its sentence is not one. 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

Habitat climate of Arctostaphylos montaraensis through the yearWarmest month September, mean daily high 20 °C; coldest month January, mean nightly low 7.2 °C; 744 mm of rain in the median year (the twelve monthly medians added). Medians across the range, from CHELSA. Habitat months, northern hemisphere.5°10°15°20°25°°C · day and nightcold quarter050100150200mm rainDLI 14–49RH 61–69%JanFebMarAprMayJunJulAugSepOctNovDec
day night rain medians and 10th–90th percentile across 7 habitat cells, CHELSA cold quarter: the three months around the coldest month's mean nightly low DLI, mol/m²/dayRH %each on its own scale
Figures by month
JanFebMarAprMayJunJulAugSepOctNovDec
Day °C13 / 12–1313 / 13–1414 / 14–1515 / 14–1617 / 16–1718 / 17–1919 / 18–2019 / 19–2020 / 19–2118 / 18–1915 / 15–1613 / 12–13
Night °C7 / 7–88 / 7–99 / 8–99 / 9–1011 / 10–1112 / 12–1213 / 13–1314 / 13–1413 / 13–1312 / 12–1210 / 9–108 / 7–8
Rain mm142 / 133–158132 / 125–147109 / 100–11945 / 40–4923 / 20–246 / 5–62 / 1–24 / 3–47 / 6–740 / 37–4491 / 87–101143 / 137–158
DLI15 / 15–1621 / 21–2231 / 30–3140 / 39–4046 / 46–4649 / 49–4948 / 47–4843 / 42–4336 / 36–3727 / 26–2818 / 17–1914 / 13–15
RH %62 / 61–6364 / 63–6465 / 64–6564 / 63–6566 / 65–6766 / 65–6869 / 67–7169 / 67–7166 / 63–7064 / 60–6662 / 61–6361 / 60–61

The daily extremes were read at a NASA POWER cell that is 48% land: neither it nor the next candidates whose coldest month's mean nightly low is within 2 °C of the median across cells sit in a POWER cell that is mostly land, and the rule reads a cold floor only from a cell that is mostly land, so none is read for this species. Nor is the coldest month's mean nightly low taken as one: it is a mean of a month's lows, not its coldest night. What that cell gave over 44 years: absolute minimum -1.5 °C, 1st-percentile night 4.0 °C, 99th-percentile day 24.2 °C.

How this section is made
Each figure is the median across the 7 grid cells holding the 130 in-range records, with the 10th–90th percentile span across those cells after the slash where it differs. A dash is a month one or more of those cells has no figure for in the grid (a variable CHELSA does not carry there), so no median is taken rather than one over fewer cells. Extremes and elevation were read at a typical spot in the range, cell 1048:1150 (37.575, -122.475). Normals: CHELSA V2.1 1981–2010 climatology, 0.05° cells (each the mean of ~36 1 km pixels). Across the range: median and 10th–90th percentile of each month across the 7 distinct grid cells holding 130 of the 130 in-range records; extremes and elevation at the typical cell 1048:1150 (its coldest month's mean nightly low nearest the median across cells, though its NASA POWER cell is only 48% land and none of the 6 next candidates within 2 °C of the median was mostly land); its position is the cell centre. Extremes: NASA POWER (MERRA-2) daily 1981–2024, cell 37.50_-122.500, lapse-corrected +164 m at 6.5 °C/km. Elevation: ETOPO 2022, 230 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 the cells of the in-range records placed well enough to read one, not at the marker.
Openly licensed records inside the range, framed on where they fall.
NativeCalifornia · regions are the level-3 units of the World Geographical Scheme for Recording Plant Distributions, as Kew's World Checklist records ranges, some under historical names such as Yugoslavia or Czechoslovakia (how).
Map marker37.572, -122.481 · in the densest population, 163 records (100% of those in range)
Kew's description“shrub or tree” · “subtropical” · quoted from WCVP, RBG Kew (CC BY 4.0); not derived here
Evidence usedThe map marker rests on all 163 georeferenced records inside the native range; the climate across the range on the 130 of them placed to within 10 km; the map shows only the 52 openly licensed ones, which alone would put the marker in the same place. 33 in-range records are placed to worse than 10 km, or with no stated accuracy (admitted only as a person's observation to three decimals), and stay on the map but off the climate.
How this section is made
The map marker: the openly licensed record nearest the middle of the densest 1° population of the 163 in-range records; it decides nothing. Records outside the native range, living specimens and records marked introduced are not used; which records count.

Photographs

Arctostaphylos montaraensis, photograph 1did not loadArctostaphylos montaraensis, photograph 2did not loadArctostaphylos montaraensis, photograph 3did not loadArctostaphylos montaraensis, photograph 4did not loadArctostaphylos montaraensis, photograph 5did not loadArctostaphylos montaraensis, photograph 6did not load

Photographs: author not stated, no rights reserved · CC0 (3); (c) klicklo, some rights reserved (CC BY); (c) Cricket Raspet, some rights reserved (CC BY) (2).

Similar habitat climate The 6 nearest by mean daily high, mean nightly low and rain, month by month. How.

Juncus lesueurii Juncus lesueurii Salt rush Photo: CC0, author not statedArtemisia pycnocephala Artemisia pycnocephala Beach wormwood Photo: CC BY, AlexErysimum teretifolium Erysimum teretifolium Ben Lomond wallflower Photo: CC0, author not statedLupinus variicolor Lupinus variicolor Lindley's Varied Lupine Photo: CC0, author not statedEriophyllum staechadifolium Eriophyllum staechadifolium Seaside woolly-sunflower Photo: CC0, author not statedPlagiobothrys chorisianus Plagiobothrys chorisianus Artist's popcornflower Photo: CC0, author not stated

Other Arctostaphylos 50 in the reference

Arctostaphylos andersonii Arctostaphylos andersonii Santa Cruz manzanita Photo: CC BY, Isaac KroneArctostaphylos auriculata Arctostaphylos auriculata Mount Diablo manzanita Photo: CC BY, er-birds Arctostaphylos australis Australian manzanita Arctostaphylos bakeri Arctostaphylos bakeri Baker's manzanita Photo: CC BY, Alexander WentworthArctostaphylos canescens Arctostaphylos canescens Hoary manzanita Photo: CC0, author not statedArctostaphylos catalinae Arctostaphylos catalinae Santa Catalina Island manzanita Photo: CC BY, Aaron KreisbergArctostaphylos × coloradensis Arctostaphylos × coloradensis Colorado manzanita Photo: CC BY, Anders HastingsArctostaphylos columbiana Arctostaphylos columbiana Columbia manzanita Photo: CC0, author not statedArctostaphylos crustacea Arctostaphylos crustacea Brittleleaf manzanita Photo: CC BY, harriiArctostaphylos cruzensis Arctostaphylos cruzensis Arroyo de la Cruz manzanita Photo: CC0, author not statedArctostaphylos densiflora Arctostaphylos densiflora Vine Hill manzanita Photo: CC BY, Madeleine ClaireArctostaphylos edmundsii Arctostaphylos edmundsii Little Sur manzanita Photo: CC BY-SA, Nicholas Wei all 51 ›

Names & registers

Also known as Arctostaphylos imbricata subsp. montaraensis. (GBIF Backbone)

GBIFPOWOIPNIWFOWikidataWikipediaiNaturalist

The record

Family
Ericaceae
Described by
Roof
Native to
California
Wild records
163 in range · 52 open

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 record gbif.species answeredasked 2026-10-21
GBIF synonyms gbif.synonyms answeredasked 2026-10-21
GBIF common names gbif.vernacular answeredasked 2026-10-21names fetched 2026-10-21
WCVP native range wcvp.distribution answeredas of 2026-06-04
GBIF occurrence records gbif.occurrences answeredas of 2026-10-21GBIF occurrence download https://doi.org/10.15468/dl.hbdw64, of 2026-10-21; 6 records within 1 km of a botanic garden, herbarium or zoo left out (6 at a botanic garden or arboretum; Wikidata's list)
Habitat climate climate answeredasked 2026-10-21
Daily extremes (NASA POWER) climate.extremes answeredasked 2026-10-21NASA POWER (MERRA-2) daily 1981–2024, cell 37.50_-122.500, lapse-corrected +164 m at 6.5 °C/km; read, and set aside: NASA POWER's cell is mostly sea (48% land), so no cold floor is shown
Wikidata wikidata answeredasked 2026-10-21IPNI and POWO linked by Kew's number for Arctostaphylos montaraensis Roof (the item's: IPNI 272507-2, POWO 309794-2)
Wikipedia wikipedia answeredasked 2026-10-21
iNaturalist photographs, wild inat.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 2026-10-22
iNaturalist photographs, cultivated inat.photos.cultivated not asked
GBIF media gbif.media answeredasked 2026-10-21
OpenAlex papers openalex not askednot yet asked for this reference; a later fill takes the papers from OpenAlex's snapshot

Every 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 8 datasets via GBIF.org; each carries its own licence.

Cultifolio

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