Streptocarpus variabilis Humbert
Photographs not checked
iNaturalist was skipped (not asked) when this page was built. Not asked, or not answered, is not "none": nothing here claims there is none. Why the site says it this way.At a glance
- Jan, shaded
- Feb, shaded
- Mar, shaded
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec, shaded
From few records: 9 records in 7 grid cells. The records.
About the genus · Streptocarpus
Streptocarpus is an Afrotropical genus of flowering plants in the family Gesneriaceae. The genus is native to Afromontane biotopes from central, eastern and southern Africa, including Madagascar and the Comoro Islands. The flowers are five-petalled, salverform tubes, almost orchid-like in appearance, and hover or arch over the plant, while the pointed, elongate fruit is of a helical form similar to that of the "tusk" of a narwhal. More on Wikipedia ›
Quoted from Wikipedia, "Streptocarpus", CC BY-SA 4.0.
Cultivation
Seasons
The rain rule reads a sharp season: 70% of the median year's rain (1,011 mm of 1,216 mm) falls in December to March. The temperature curve is flat, 3.4 °C between the warmest and coldest month, so the growing-season rule does not infer a growing season from it. Months are the habitat's, southern hemisphere. The temperature curve moves under 4 °C between the warmest and coldest month, where the shift rule does not apply, so they are not shifted for a collection elsewhere.
Rain
1,216 mm in the median year at the habitat, 1,011 mm of it December to March. Wettest month February at 330 mm, driest month September at 10 mm. Across the grid cells of the range the year's total runs 1,142 mm to 1,400 mm, the 10th to 90th percentile of each cell's own year. The median of the cells' own yearly totals, 1,213 mm, is the year's rain at the top of the page; the 1,216 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: 29 to 43 mol/m²/day across the year (daily light integral, median year across the grid cells of the range, CHELSA).
Warmth and air
Coldest: the 1st-percentile night over 44 years at a typical spot in the range is 16.0 °C, the absolute minimum 12.9 °C, no frost in 44 years (NASA POWER daily minima). Warmest: the 99th-percentile day is 35.3 °C. Monthly means: the coldest month's mean nightly low 18.5 °C in August (across the grid cells of the range 15.9 °C to 19.2 °C), the warmest month's mean daily high 30.4 °C in December (median year across the grid cells of the range, CHELSA). Cold floor: 16.0 °C, which is the 1st-percentile night over 44 years at a typical spot in the range (NASA POWER).
Relative humidity at the habitat: 59 to 68% 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 +14 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
From few records: this habitat climate is read from 9 records in 7 grid cells; a page says so under 12 records or 5 cells, and shows the figures as read.
Habitat months, southern hemisphere
Mean daily high from 26 °C in Jul to 30 °C in Jan, Feb, Mar, Nov and Dec; mean nightly low from 19 °C in Jun, Jul, Aug and Sep to 22 °C in Jan, Feb, Mar, Apr and Dec. The cold quarter, Jun to Aug, is the three months around the coldest month's mean nightly low, centred on the 4 months in a row that tie for it. 1,216 mm of rain in the median year (the twelve monthly medians added), the wettest month Feb. The bands show the 10th to 90th percentile across 7 habitat cells. Over 44 years at a typical spot in the range (NASA POWER) the absolute minimum was 12.9 °C and the 99th-percentile day 35.3 °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 | 30 / 28–30 | 30 / 28–30 | 30 / 28–30 | 29 / 28–30 | 29 / 27–29 | 27 / 25–28 | 26 / 25–27 | 27 / 25–28 | 28 / 26–29 | 29 / 28–30 | 30 / 29–31 | 30 / 29–31 |
| Night °C | 22 / 20–22 | 22 / 20–23 | 22 / 20–23 | 22 / 19–22 | 21 / 18–22 | 19 / 17–20 | 19 / 16–19 | 19 / 16–19 | 19 / 16–20 | 20 / 17–20 | 21 / 18–21 | 22 / 19–22 |
| Rain mm | 296 / 256–353 | 330 / 290–403 | 176 / 164–204 | 60 / 58–67 | 22 / 17–27 | 12 / 9–20 | 13 / 9–23 | 15 / 10–24 | 10 / 7–15 | 23 / 20–25 | 50 / 45–54 | 209 / 186–237 |
| DLI | 36 / 33–38 | 35 / 31–36 | 36 / 34–37 | 35 / 35–36 | 32 / 32–33 | 29 / 29–31 | 30 / 30–32 | 34 / 34–35 | 39 / 39–40 | 43 / 42–43 | 43 / 42–43 | 39 / 37–40 |
| RH % | 67 / 66–71 | 68 / 67–72 | 66 / 65–69 | 64 / 62–66 | 61 / 60–63 | 59 / 58–61 | 59 / 57–61 | 59 / 57–61 | 59 / 57–61 | 60 / 58–62 | 61 / 59–63 | 65 / 63–67 |
How this section is made
Natural habitat
How this section is made
Photographs
Related
Similar habitat climate The 6 nearest by mean daily high, mean nightly low and rain, month by month. How.
Cyphostemma darainense Vitaceae Photo: CC0, author not stated Ceropegia saxatilis Apocynaceae 
Adansonia madagascariensis Madagascar Baobab Photo: CC BY, jeanjacquesgodon Talinella boiviniana Talinaceae Other Streptocarpus 80 in the reference
Streptocarpus brevipilosus Gesneriaceae Photo: CC0, Daderot
Streptocarpus brevistamineus Gesneriaceae Photo: CC0, author not stated Streptocarpus buchananii Gesneriaceae Streptocarpus bullatus Gesneriaceae Streptocarpus capuronii Gesneriaceae 
Streptocarpus caulescens Nodding Violet Photo: CC BY, TANAKA Juuyoh (????)
Streptocarpus confusus Gesneriaceae Photo: CC0, author not stated all 81 ›Names & registers
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 2026-10-22
gbif.species answeredasked 2026-10-22gbif.synonyms answeredasked 2026-10-22gbif.vernacular answeredasked 2026-10-22names fetched 2026-10-22wcvp.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 2026-10-22climate.extremes answeredasked 2026-10-22NASA POWER (MERRA-2) daily 1981–2024, cell -13.00_49.375, lapse-corrected +14 m at 6.5 °C/kmwikidata answeredasked 2026-10-22wikipedia nothing to reportasked 2026-10-22inat.taxon not askedinat.photos.wild not askedinat.photos.cultivated not askedgbif.media nothing to reportasked 2026-10-22commons nothing to reportasked 2026-10-22openalex 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 4 datasets via GBIF.org; each carries its own licence.