Hemionitis carlotta-halliae (W.H.Wagner & E.F.Gilbert) Christenh.
English names not checked: Wikidata's common names were not read for this page.
Photographs not checked
iNaturalist and GBIF media were 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, under 5 mm of rain
- Jul, under 5 mm of rain
- Aug, under 5 mm of rain
- Sep
- Oct
- Nov
- Dec, shaded
Summary
Aspidotis carlotta-halliae is a species of perennial fern known by the common names tufted lacefern and Carlotta Hall's lace fern. It is endemic to California, where it is found in the Central Coast Ranges and coastal hillsides, often on serpentine soils. This species is a fertile hybrid between Aspidotis californica and Aspidotis densa. The fern was named for fern collector Carlotta Case Hall, who coauthored the 1912 botanical guide A Yosemite Flora with her husband, botanist Harvey Monroe Hall.
Quoted from Wikipedia, "Aspidotis carlotta-halliae", CC BY-SA 4.0; its title is one of this species' older names (GBIF Backbone), which is the proof that the article is this species'.
Cultivation
Seasons
The rain rule reads a winter growing season: 70% of the median year's rain (600 mm of 823 mm) falls in December to March, cooler than the year (wet-season mean 9.2 °C against a yearly mean of 13.8 °C). Months are the habitat's, northern hemisphere; shifted six months for a southern-hemisphere collection: June to September.
Rain
823 mm in the median year at the habitat, 600 mm of it December to March. Wettest month January at 168 mm, driest month July at 1 mm; 3 months under 5 mm. Across the grid cells of the range the year's total runs 443 mm to 1,322 mm, the 10th to 90th percentile of each cell's own year. The median of the cells' own yearly totals, 828 mm, is the year's rain at the top of the page; the 823 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: 16 to 53 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 54).
Warmth and air
Coldest: the 1st-percentile night over 44 years at a typical spot in the range is -1.0 °C, the absolute minimum -5.8 °C, 332 frost nights in 44 years, 7.5 a year (NASA POWER daily minima). Warmest: the 99th-percentile day is 35.7 °C. Monthly means: the coldest month's mean nightly low 4.8 °C in January (across the grid cells of the range 1.8 °C to 7.0 °C), the warmest month's mean daily high 26.2 °C in July and August (median year across the grid cells of the range, CHELSA). Cold floor: -1.0 °C, which is the 1st-percentile night over 44 years at a typical spot in the range (NASA POWER).
Relative humidity at the habitat: 47 to 58% 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 +217 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 13 °C in Jan, Feb and Dec to 26 °C in Jul and Aug; mean nightly low from 5 °C in Jan, Feb and Dec to 15 °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 3 months in a row that tie for it. 823 mm of rain in the median year (the twelve monthly medians added), the wettest month Jan. The bands show the 10th to 90th percentile across 21 habitat cells. Over 44 years at a typical spot in the range (NASA POWER) the absolute minimum was -5.8 °C and the 99th-percentile day 35.7 °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 | 13 / 11–14 | 13 / 12–15 | 14 / 13–17 | 17 / 15–20 | 20 / 17–24 | 23 / 19–29 | 26 / 19–32 | 26 / 20–31 | 24 / 20–29 | 21 / 18–23 | 16 / 15–17 | 13 / 10–13 |
| Night °C | 5 / 2–7 | 5 / 2–8 | 6 / 3–9 | 7 / 5–9 | 10 / 8–11 | 13 / 11–14 | 15 / 12–16 | 15 / 13–16 | 13 / 12–15 | 11 / 9–12 | 8 / 5–9 | 5 / 2–7 |
| Rain mm | 168 / 86–240 | 154 / 82–218 | 122 / 69–196 | 49 / 31–101 | 17 / 12–57 | 4 / 2–20 | 1 / 1–2 | 2 / 1–4 | 7 / 5–23 | 40 / 23–82 | 103 / 44–155 | 156 / 75–234 |
| DLI | 17 / 14–19 | 23 / 20–24 | 33 / 30–34 | 43 / 39–44 | 49 / 46–50 | 53 / 50–54 | 52 / 49–54 | 48 / 44–49 | 40 / 37–41 | 29 / 26–31 | 20 / 17–22 | 16 / 13–18 |
| RH % | 56 / 52–63 | 58 / 56–63 | 57 / 55–63 | 54 / 51–62 | 54 / 47–62 | 50 / 44–62 | 47 / 41–64 | 47 / 41–65 | 48 / 44–65 | 51 / 47–63 | 54 / 51–61 | 56 / 53–61 |
How this section is made
Natural habitat
This species has no GBIF key of its own. Its records are GBIF's under the key of the name Kew's World Checklist holds as this plant: 9200409 (Aspidotis carlotta-halliae (W.H.Wagner & E.F.Gilbert) Lellinger, 169 records). No name was matched to GBIF; the keys are read from Kew's synonymy. How.
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.
Diplacus linearis Chaparral bush monkeyflower Photo: CC BY, Daniel Kennedy
Malacothamnus lucianus Arroyo Seco bushmallow Photo: CC BY-SA, paulexcoff
Cardamine californica American milkmaids Photo: CC0, author not stated
Hoita strobilina Loma prieta Photo: CC0, author not stated
Allium unifolium American garlic Photo: CC BY, wildflowerwatching
Grindelia hirsutula Hairy gumweed Photo: CC BY, Jonathan CurleyOther Hemionitis 74 in the reference
Hemionitis acrostica Pteridaceae Photo: CC BY-SA, Krzysztof Ziarnek, Kenraiz Hemionitis alabamensis Pteridaceae Hemionitis arifolia Pteridaceae Hemionitis aspera Pteridaceae Hemionitis atropurpurea Pteridaceae Hemionitis bonariensis Pteridaceae Hemionitis bradburyi Pteridaceae Hemionitis breweri Pteridaceae Hemionitis bridgesii Pteridaceae Hemionitis calidirupium Pteridaceae Hemionitis californica Pteridaceae Hemionitis calomelanos Pteridaceae all 75 ›Names & registers
Also known as Cheilanthes carlotta-halliae; Cheilanthes siliquosa f. carlotta-halliae; Aspidotis carlotta-halliae. (WCVP, RBG Kew)
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
kew.names answeredas of 2026-06-04Kew's entry Hemionitis carlotta-halliae (W.H.Wagner & E.F.Gilbert) Christenh. (plant_name_id 3217961), read from Kew's names filegbif.species not askedGBIF's backbone holds no one accepted species of this name, and a name it holds only as another species' synonym is not taken for this one, so GBIF's records were not askedgbif.synonyms not askedGBIF's backbone holds no one accepted species of this name, and a name it holds only as another species' synonym is not taken for this one, so GBIF's records were not askedgbif.vernacular not askedGBIF's backbone holds no one accepted species of this name, and a name it holds only as another species' synonym is not taken for this one, so GBIF's records were not askedwcvp.distribution answeredas of 2026-06-04gbif.occurrences answeredas of 2026-10-21this species has no GBIF key of its own; its records are read under GBIF's keys for the names Kew's file holds as this plant, never by a name matched; GBIF occurrence download https://doi.org/10.15468/dl.hbdw64, of 2026-10-21; 169 records of GBIF's key 9200409, Aspidotis carlotta-halliae (W.H.Wagner & E.F.Gilbert) Lellinger (Kew's file holds it as Aspidotis carlotta-halliae (W.H.Wagner & E.F.Gilbert) Lellinger (synonym under Hemionitis carlotta-halliae (W.H.Wagner & E.F.Gilbert) Christenh.)): the GBIF downloadclimate answeredasked 2026-10-22climate.extremes answeredasked 2026-10-22NASA POWER (MERRA-2) daily 1981–2024, cell 35.50_-120.625, lapse-corrected +217 m at 6.5 °C/kmwikidata answeredasked 2026-10-22found by Kew's IPNI identifier 77182155-1, POWO 77182155-1wikipedia answeredasked 2026-10-22Wikipedia redirects Hemionitis carlotta-halliae to Aspidotis carlotta-halliae, an older name of this species (Aspidotis carlotta-halliae)inat.taxon not askedinat.photos.wild not askedinat.photos.cultivated not askedgbif.media not askedGBIF's backbone holds no one accepted species of this name, and a name it holds only as another species' synonym is not taken for this one, so GBIF's records were not askedcommons 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 15 datasets via GBIF.org; each carries its own licence.