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Clematis peterae; photograph 謝麗霦, CC BY, iNaturalist via GBIF CC BY謝麗霦, CC BY, iNaturalist via GBIF

Clematis peterae Hand.-Mazz.

Ranunculaceae · China South-Central, China North-Central +2 · listed by its genus as a temperate garden plant

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Habitat figuresfrom few records
Coldest month, mean nightly low
0.1°C
Jan at the habitat, not a floor; extremes not used (the weather cell's ground is too far off) CHELSA
Warmest month, mean daily high
21°C
Jul and Aug at the habitat CHELSA
Rain a year (median across the range)
3,095mm
12 months of 25 mm or more in the median year CHELSA
Open-sky light
18–33DLI
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 summers: the rain comes April to September, read as a summer growing season. rain rule, CHELSA
Northern hemisphere unless you set your site. The chart is in the habitat's months.

From few records: 7 records in 5 grid cells. The records.

About the genus · Clematis

Clematis is a genus of about 380 species within the buttercup family, Ranunculaceae. Their garden hybrids and cultivars have been popular among gardeners, beginning with Clematis 'Jackmanii', a garden staple since 1862. More cultivars are being produced constantly, mainly of Chinese and Japanese origin.

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

Cultivation

Grouped as a temperate garden plant, listed under the genus Clematis in the archetype table, and Kew describes it as “climber”, “temperate”.

Seasons

The rain rule reads a summer growing season: 70% of the median year's rain (2,276 mm of 3,080 mm) falls in April to September, warmer than the year (wet-season mean 16.1 °C against a yearly mean of 12.2 °C). Months are the habitat's, northern hemisphere; shifted six months for a southern-hemisphere collection: October to March.

Rain

3,080 mm in the median year at the habitat, 2,276 mm of it April to September. Wettest month August at 455 mm, driest month December at 74 mm. Across the grid cells of the range the year's total runs 1,179 mm to 4,366 mm, the 10th to 90th percentile of each cell's own year. The median of the cells' own yearly totals, 3,095 mm, is the year's rain at the top of the page; the 3,080 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: 18 to 33 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 16, the highest 90th-percentile month 35).

Warmth and air
Temperature

Monthly means: the coldest month's mean nightly low 0.1 °C in January (across the grid cells of the range -4.6 °C to 2.6 °C), the warmest month's mean daily high 21.0 °C in July (median year across the grid cells of the range, CHELSA). Cold floor: none read. The nearest figure is 0.1 °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 whose ground is too far above or below the typical spot to correct for, and are not used.

Humidity

Relative humidity at the habitat: 63 to 67% 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.

Group. Listed under the genus Clematis in the archetype table, and Kew describes it as “climber”, “temperate”. A group is taken only where Kew's description of the species agrees with the table's listing. The table gives no figure and no prose; the cold floor is the habitat's alone.

Climate across the habitat

From few records: this habitat climate is read from 7 records in 5 grid cells; a page says so under 12 records or 5 cells, and shows the figures as read.

Habitat months, northern hemisphere

Habitat climate of Clematis peterae through the yearWarmest months July and August, mean daily high 21 °C; coldest month January, mean nightly low 0.1 °C; 3,080 mm of rain in the median year (the twelve monthly medians added). Medians across the range, from CHELSA. Habitat months, northern hemisphere.-10°0°10°20°30°frost°C · day and nightcold quarter0200400600800mm rainDLI 18–33RH 63–67%JanFebMarAprMayJunJulAugSepOctNovDec
day night rain medians and 10th–90th percentile across 5 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 °C8 / 4–109 / 6–1114 / 10–1416 / 14–1918 / 16–2220 / 17–2521 / 18–2821 / 18–2719 / 16–2417 / 13–2014 / 10–1510 / 6–11
Night °C0 / -5–32 / -3–44 / 1–69 / 5–1011 / 9–1413 / 11–1713 / 11–2113 / 11–2012 / 10–1710 / 7–126 / 2–71 / -3–4
Rain mm90 / 24–108183 / 31–184182 / 55–208208 / 77–288354 / 105–520425 / 161–660404 / 242–647455 / 194–713430 / 121–566191 / 67–28284 / 35–13174 / 17–97
DLI18 / 17–1920 / 20–2225 / 23–2729 / 27–3130 / 29–3330 / 29–3133 / 30–3531 / 28–3327 / 21–2925 / 18–2621 / 16–2118 / 16–18
RH %64 / 57–6666 / 58–6865 / 59–6763 / 60–6764 / 60–6765 / 63–6865 / 64–6866 / 65–6867 / 63–7067 / 60–7065 / 58–6864 / 56–66

The daily extremes were not used: the correction for elevation, +1921 m, is beyond the 1,000 m either way that a lapse rate is applied over, so the weather cell's ground is other terrain than the typical spot's. So no cold floor is read for this species, and the coldest month's mean nightly low is not taken as one. What that cell gave, so corrected, over 44 years: absolute minimum -12.2 °C, 1st-percentile night -5.9 °C.

How this section is made
Each figure is the median across the 5 grid cells holding the 7 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 1330:6018 (23.475, 120.925). 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 5 distinct grid cells holding 7 of the 7 in-range records; extremes and elevation at the typical cell 1330:6018 (its coldest month's mean nightly low nearest the median across cells); its position is the cell centre. Extremes: NASA POWER (MERRA-2) daily 1981–2024, cell 23.50_120.625, lapse-corrected +1921 m at 6.5 °C/km. Elevation: ETOPO 2022, 2608 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.
NativeChina South-Central, China North-Central, China Southeast, Tibet · 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 marker30.36, 102.81 · in the densest population, 292 records (78% of those in range)
Kew's description“climber” · “temperate” · quoted from WCVP, RBG Kew (CC BY 4.0); not derived here
Evidence usedThe map marker rests on all 375 georeferenced records inside the native range; the climate across the range on the 7 of them placed to within 10 km; the map shows only the 220 openly licensed ones, which alone would put the marker 1 km away. 7 records outside the WCVP native range not used. Under a dozen records behind the climate. 368 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 inside the densest 4° block of the 375 in-range records; it decides nothing. Records outside the native range, living specimens and records marked introduced are not used; which records count.

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

Oxalis griffithii Oxalis griffithii Oxalidaceae Photo: CC BY, Jaw-Jian LaFragaria nilgerrensis Fragaria nilgerrensis Huangmao strawberry Photo: CC0, author not statedRhododendron morii Rhododendron morii Ericaceae Photo: CC BY-SA, Henrik WergeIlex yunnanensis Ilex yunnanensis Yunnan Holly Photo: CC BY, Cheng-Te HsuTsuga chinensis Tsuga chinensis Chinese hemlock Photo: CC BY, chrisdtSalix fulvopubescens Salix fulvopubescens Salicaceae Photo: CC BY, 謝麗霦

Other Clematis 112 in the reference

Clematis addisonii Clematis addisonii Addison Brown's clematis Photo: CC0, author not statedClematis aethusifolia Clematis aethusifolia Parsley-leaf clematis Photo: CC BY, zhangshenClematis afoliata Clematis afoliata Rush-stem clematis Photo: CC BY, Rock McLaren Clematis akebioides Ranunculaceae Clematis akoensis Clematis akoensis Ranunculaceae Photo: CC0, 葉子Clematis albicoma Clematis albicoma White-haired leather-flower Photo: CC BY, Alaina KrakowiakClematis alpina Clematis alpina Alpine Clematis Photo: CC0, author not statedClematis apiifolia Clematis apiifolia Three-leaf clematis Photo: CC BY, Timur KalininskyClematis aristata Clematis aristata Goat's-beard Photo: CC BY, Ian RainbowClematis armandii Clematis armandii Evergreen Clematis Photo: CC0, author not stated Clematis aureolata Ranunculaceae Clematis brachiata Clematis brachiata Traveler's-joy Photo: CC0, author not stated all 113 ›

Names & registers

Also known as Clematis gouriana var. finetii; Clematis peterae var. mollis; Clematis vitalba var. microcarpa. (GBIF Backbone)

GBIFPOWOIPNIWFOWikidata

The record

Family
Ranunculaceae
Described by
Hand.-Mazz.
Native to
China South-Central, China North-Central, China Southeast +1
Wild records
375 in range · 220 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; 2 records within 1 km of a botanic garden, herbarium or zoo left out (2 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 23.50_120.625, lapse-corrected +1921 m at 6.5 °C/km; read, and set aside: the correction for elevation, +1921 m, is beyond the 1,000 m either way that a lapse rate is applied over, so the weather cell's ground is other terrain than the typical spot's, so no cold floor is shown
Wikidata wikidata answeredasked 2026-10-21
Wikipedia wikipedia nothing to reportasked 2026-10-21
iNaturalist taxon inat.taxon not asked
iNaturalist photographs, wild inat.photos.wild not asked
iNaturalist photographs, cultivated inat.photos.cultivated not asked
GBIF media gbif.media answeredasked 2026-10-21
Wikimedia Commons commons nothing to reportasked 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 19 datasets via GBIF.org; each carries its own licence.

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