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Stephania excentrica H.S.Lo

Menispermaceae

Climate known Photographs not checked 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.

About the genus · Stephania

Stephania is a genus of flowering plants in the family Menispermaceae. It includes 70 species native to tropical and southern Africa, eastern and southern Asia, Australia, and the tropical Pacific Islands. They are herbaceous perennial vines, growing to around four metres tall, with a large tuber. More on Wikipedia ›

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

Family

Menispermaceae

Described by

H.S.Lo

Native to

China South-Central, China Southeast

Wild records

22 in range· 5 open

At a glance

Warmest month

29°C

Aug, mean day; nights 22 °C (CHELSA)

Rain

1442mm/yr

12 wet months · peak Jul 245 mm (CHELSA)

Light

14–32DLI

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 the genus Stephania, which is reliably one kind of plant (archetype table). Rain rule: a summer growing season, April to September in the northern hemisphere (April to September at the habitat, northern). Habitat rain 1442 mm a year, wettest July at 245 mm, driest December at 28 mm (habitat calendar, northern hemisphere). Open sky over the habitat: 14 to 32 mol/m²/day. Cold floor -3.9 °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 the genus Stephania, which is reliably 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 summer growing season, April to September in the northern hemisphere (April to September at the habitat, northern).

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

The rain rule reads a summer growing season: 70% of the year's rain (1106 mm of 1442 mm) falls in April to September, warmer than the year (wet-season mean 23.1 °C against a yearly mean of 17.2 °C). Months are the habitat's, northern hemisphere; shifted six months for a southern-hemisphere collection: October to March.

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 1442 mm a year, wettest July at 245 mm, driest December at 28 mm (habitat calendar, northern hemisphere).

This species’ habitat figures, with their source.

1442 mm a year at the habitat, 1106 mm of it April to September. Wettest month July at 245 mm, driest December at 28 mm. Across the envelope cells the year's total runs 1109 mm to 2100 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: 14 to 32 mol/m²/day.

This species’ habitat figures, with their source.

Open sky over the habitat: 14 to 32 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 11, the highest 90th-percentile month 36).

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 -3.9 °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 -3.9 °C, the absolute minimum -13.1 °C, about 23 frost nights a year (NASA POWER daily minima). Warmest: the 99th-percentile day is 33.9 °C. Monthly means: coldest night 2.4 °C in January (across the envelope cells 0.3 °C to 6.0 °C), warmest day 29.2 °C in August (median year across the envelope cells, CHELSA). Cold floor: -3.9 °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: 62 to 64% 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 21 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	10 / 6–14	11 / 8–16	15 / 13–19	21 / 18–24	25 / 23–27	27 / 26–29	29 / 27–32	29 / 27–31	26 / 24–29	21 / 19–24	17 / 14–19	12 / 9–15
Night °C	2 / 0–6	5 / 2–8	8 / 6–11	13 / 11–16	17 / 15–19	20 / 19–22	22 / 20–25	22 / 20–24	19 / 17–22	14 / 13–16	9 / 8–11	4 / 2–7
Rain mm	38 / 21–84	45 / 25–119	66 / 44–174	132 / 72–247	205 / 129–325	238 / 206–427	245 / 149–292	171 / 152–248	115 / 87–164	99 / 72–116	60 / 46–80	28 / 19–50
DLI	14 / 12–17	15 / 13–18	19 / 16–24	24 / 21–28	28 / 25–29	29 / 26–30	32 / 29–36	31 / 29–33	26 / 23–28	20 / 15–24	17 / 13–20	15 / 11–18
RH %	64 / 60–68	64 / 60–70	63 / 61–68	63 / 60–66	63 / 60–65	64 / 62–67	64 / 62–69	63 / 61–67	62 / 60–65	62 / 59–66	62 / 59–65	62 / 58–65

Each figure is the median across the 21 grid cells holding the 22 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 1265:5885 (26.725, 114.275). Over 44 years there: absolute minimum -13.1 °C, 1st-percentile night -3.9 °C, 99th-percentile day 33.9 °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 21 distinct grid cells holding the 22 in-range records; extremes and elevation at the typical cell 1265:5885 (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 26.50_114.375, lapse-corrected -157 m at 6.5 °C/km. Elevation: ETOPO 2022, 283 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.

NativeChina South-Central, China Southeast

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

Map marker29.991, 109.485 · in the densest population, 6 records (27% of those in range)

Evidence usedThe map marker and the climate envelope rest on all 22 georeferenced records inside the native range; the map shows only the 5 openly licensed ones, which alone would put the marker 68 km away.

The map markerthe map marker: the openly licensed record nearest the middle of the densest 1° population of the 22 in-range records; it decides nothing.

Papers naming this species

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

An Alkaloid with a Novel Skeleton from the Roots ofStephania excentrica

Jing‐Zhen Deng, Shou‐Xun Zhao, Zhenchun Miao (1993) · Natural product letters

2-N-Methylexcentricine, a New Alkaloid from Roots of Stephania excentrica

Jing‐Zhen Deng, Shou‐Xun Zhao (1997) · Journal of Natural Products

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