- Kingdom
- Plantae
- Phylum
- Tracheophyta
- Class
- Magnoliopsida
- Order
- Ranunculales
- Family
- Ranunculaceae
- Genus
- Caltha
Range
Where it is recorded
Season shown in 6 of Ohio's 88 counties. Explore Ohio
- No result yet (43)
- Recorded, too few records for a result (34)
- Recorded, season not shown (5)
- Season shown (6)
Counties as a table
| County | Records |
|---|---|
| Adams County | Recorded, too few records for a result |
| Allen County | Recorded, too few records for a result |
| Ashland County | Recorded, too few records for a result |
| Ashtabula County | Recorded, too few records for a result |
| Athens County | Recorded, too few records for a result |
| Auglaize County | No qualifying records yet |
| Belmont County | No qualifying records yet |
| Brown County | No qualifying records yet |
| Butler County | No qualifying records yet |
| Carroll County | No qualifying records yet |
| Champaign County | 59 · Recorded, season not shown |
| Clark County | Recorded, too few records for a result |
| Clermont County | No qualifying records yet |
| Clinton County | No qualifying records yet |
| Columbiana County | No qualifying records yet |
| Coshocton County | Recorded, too few records for a result |
| Crawford County | Recorded, too few records for a result |
| Cuyahoga County | 41 · Season shown |
| Darke County | Recorded, too few records for a result |
| Defiance County | No qualifying records yet |
| Delaware County | Recorded, too few records for a result |
| Erie County | Recorded, too few records for a result |
| Fairfield County | Recorded, too few records for a result |
| Fayette County | No qualifying records yet |
| Franklin County | Recorded, too few records for a result |
| Fulton County | Recorded, too few records for a result |
| Gallia County | No qualifying records yet |
| Geauga County | 31 · Season shown |
| Greene County | 49 · Recorded, season not shown |
| Guernsey County | Recorded, too few records for a result |
| Hamilton County | Recorded, too few records for a result |
| Hancock County | Recorded, too few records for a result |
| Hardin County | 26 · Recorded, season not shown |
| Harrison County | No qualifying records yet |
| Henry County | No qualifying records yet |
| Highland County | Recorded, too few records for a result |
| Hocking County | No qualifying records yet |
| Holmes County | No qualifying records yet |
| Huron County | Recorded, too few records for a result |
| Jackson County | No qualifying records yet |
| Jefferson County | Recorded, too few records for a result |
| Knox County | Recorded, too few records for a result |
| Lake County | 28 · Recorded, season not shown |
| Lawrence County | No qualifying records yet |
| Licking County | Recorded, too few records for a result |
| Logan County | Recorded, too few records for a result |
| Lorain County | Recorded, too few records for a result |
| Lucas County | Recorded, too few records for a result |
| Madison County | No qualifying records yet |
| Mahoning County | Recorded, too few records for a result |
| Marion County | No qualifying records yet |
| Medina County | 33 · Season shown |
| Meigs County | No qualifying records yet |
| Mercer County | Recorded, too few records for a result |
| Miami County | No qualifying records yet |
| Monroe County | No qualifying records yet |
| Montgomery County | Recorded, too few records for a result |
| Morgan County | No qualifying records yet |
| Morrow County | Recorded, too few records for a result |
| Muskingum County | No qualifying records yet |
| Noble County | No qualifying records yet |
| Ottawa County | No qualifying records yet |
| Paulding County | No qualifying records yet |
| Perry County | No qualifying records yet |
| Pickaway County | No qualifying records yet |
| Pike County | No qualifying records yet |
| Portage County | 42 · Recorded, season not shown |
| Preble County | No qualifying records yet |
| Putnam County | No qualifying records yet |
| Richland County | 36 · Season shown |
| Ross County | Recorded, too few records for a result |
| Sandusky County | No qualifying records yet |
| Scioto County | No qualifying records yet |
| Seneca County | No qualifying records yet |
| Shelby County | No qualifying records yet |
| Stark County | 25 · Season shown |
| Summit County | 119 · Season shown |
| Trumbull County | Recorded, too few records for a result |
| Tuscarawas County | No qualifying records yet |
| Union County | No qualifying records yet |
| Van Wert County | No qualifying records yet |
| Vinton County | Recorded, too few records for a result |
| Warren County | Recorded, too few records for a result |
| Washington County | No qualifying records yet |
| Wayne County | No qualifying records yet |
| Williams County | No qualifying records yet |
| Wood County | No qualifying records yet |
| Wyandot County | Recorded, too few records for a result |
No mapped range from the range source used, the USGS Gap Analysis Project, which maps land vertebrates only.
Season
When it is recorded
In Stark County
Late March to mid-May, middle week Apr 26 – May 2
Records per week from 25 records in 7 of the 10 years from 2016 to 2025. Shows when people recorded it, not how common it is. The grey bars show how many records of all species were made here each week, so you can see when recording itself was high or low; the season is not adjusted by them.
Recorded on 24 dates. Latest record: April 2025.
Show as a table
| Week | Records of marsh marigold | Years recorded | Records of all species |
|---|---|---|---|
| Jan 4–10 | 0 | 0 | 143 |
| Jan 11–17 | 0 | 0 | 119 |
| Jan 18–24 | 0 | 0 | 147 |
| Jan 25–31 | 0 | 0 | 143 |
| Feb 1–7 | 0 | 0 | 117 |
| Feb 8–14 | 0 | 0 | 168 |
| Feb 15–21 | 0 | 0 | 164 |
| Feb 22–28 | 0 | 0 | 247 |
| Mar 1–7 | 0 | 0 | 246 |
| Mar 8–14 | 0 | 0 | 250 |
| Mar 15–21 | 0 | 0 | 316 |
| Mar 22–28 | 0 | 0 | 302 |
| Mar 29 – Apr 4 | 2 | 2 | 254 |
| Apr 5–11 | 1 | 1 | 386 |
| Apr 12–18 | 4 | 2 | 628 |
| Apr 19–25 | 3 | 3 | 720 |
| Apr 26 – May 2 | 8 | 5 | 1,636 |
| May 3–9 | 3 | 3 | 1,048 |
| May 10–16 | 2 | 2 | 697 |
| May 17–23 | 1 | 1 | 768 |
| May 24–30 | 0 | 0 | 1,208 |
| May 31 – Jun 6 | 1 | 1 | 850 |
| Jun 7–13 | 0 | 0 | 906 |
| Jun 14–20 | 0 | 0 | 903 |
| Jun 21–27 | 0 | 0 | 1,262 |
| Jun 28 – Jul 4 | 0 | 0 | 1,285 |
| Jul 5–11 | 0 | 0 | 1,477 |
| Jul 12–18 | 0 | 0 | 1,492 |
| Jul 19–25 | 0 | 0 | 1,222 |
| Jul 26 – Aug 1 | 0 | 0 | 1,310 |
| Aug 2–8 | 0 | 0 | 1,099 |
| Aug 9–15 | 0 | 0 | 1,148 |
| Aug 16–22 | 0 | 0 | 1,200 |
| Aug 23–29 | 0 | 0 | 1,155 |
| Aug 30 – Sep 5 | 0 | 0 | 1,026 |
| Sep 6–12 | 0 | 0 | 1,177 |
| Sep 13–19 | 0 | 0 | 1,868 |
| Sep 20–26 | 0 | 0 | 782 |
| Sep 27 – Oct 3 | 0 | 0 | 687 |
| Oct 4–10 | 0 | 0 | 770 |
| Oct 11–17 | 0 | 0 | 548 |
| Oct 18–24 | 0 | 0 | 336 |
| Oct 25–31 | 0 | 0 | 382 |
| Nov 1–7 | 0 | 0 | 289 |
| Nov 8–14 | 0 | 0 | 168 |
| Nov 15–21 | 0 | 0 | 147 |
| Nov 22–28 | 0 | 0 | 116 |
| Nov 29 – Dec 5 | 0 | 0 | 84 |
| Dec 6–12 | 0 | 0 | 108 |
| Dec 13–19 | 0 | 0 | 113 |
| Dec 20–26 | 0 | 0 | 123 |
| Dec 27 – Jan 2 | 0 | 0 | 151 |
Reported in flower
Only 5 records here show flowers, too few to show a flowering season. One needs at least 20 records from 5 different years.
Reported in fruit
Only 1 records here show fruit, too few to show a fruiting season. One needs at least 20 records from 5 different years.
In Ohio
Late March to late May, middle week Apr 19–25
Records per week from 939 records in 10 of the 10 years from 2016 to 2025. Shows when people recorded it, not how common it is. The grey bars show how many records of all species were made here each week, so you can see when recording itself was high or low; the season is not adjusted by them.
Recorded on 356 dates. Latest record: December 2025.
Show as a table
| Week | Records of marsh marigold | Years recorded | Records of all species |
|---|---|---|---|
| Jan 4–10 | 0 | 0 | 6,211 |
| Jan 11–17 | 0 | 0 | 5,146 |
| Jan 18–24 | 0 | 0 | 4,645 |
| Jan 25–31 | 0 | 0 | 4,698 |
| Feb 1–7 | 0 | 0 | 6,023 |
| Feb 8–14 | 0 | 0 | 5,888 |
| Feb 15–21 | 0 | 0 | 5,436 |
| Feb 22–28 | 2 | 1 | 6,846 |
| Mar 1–7 | 2 | 2 | 8,321 |
| Mar 8–14 | 1 | 1 | 10,384 |
| Mar 15–21 | 5 | 3 | 12,620 |
| Mar 22–28 | 13 | 7 | 13,949 |
| Mar 29 – Apr 4 | 28 | 9 | 19,661 |
| Apr 5–11 | 77 | 10 | 26,860 |
| Apr 12–18 | 176 | 9 | 39,925 |
| Apr 19–25 | 231 | 10 | 41,623 |
| Apr 26 – May 2 | 200 | 10 | 56,391 |
| May 3–9 | 87 | 10 | 52,952 |
| May 10–16 | 22 | 7 | 53,785 |
| May 17–23 | 15 | 6 | 57,698 |
| May 24–30 | 23 | 7 | 54,651 |
| May 31 – Jun 6 | 11 | 6 | 53,099 |
| Jun 7–13 | 20 | 9 | 53,700 |
| Jun 14–20 | 7 | 5 | 56,625 |
| Jun 21–27 | 13 | 5 | 55,361 |
| Jun 28 – Jul 4 | 0 | 0 | 58,477 |
| Jul 5–11 | 1 | 1 | 61,336 |
| Jul 12–18 | 2 | 2 | 64,722 |
| Jul 19–25 | 1 | 1 | 69,753 |
| Jul 26 – Aug 1 | 0 | 0 | 59,416 |
| Aug 2–8 | 0 | 0 | 59,712 |
| Aug 9–15 | 0 | 0 | 55,994 |
| Aug 16–22 | 0 | 0 | 54,328 |
| Aug 23–29 | 0 | 0 | 51,772 |
| Aug 30 – Sep 5 | 0 | 0 | 57,167 |
| Sep 6–12 | 0 | 0 | 59,075 |
| Sep 13–19 | 0 | 0 | 54,543 |
| Sep 20–26 | 0 | 0 | 45,860 |
| Sep 27 – Oct 3 | 0 | 0 | 43,180 |
| Oct 4–10 | 1 | 1 | 37,841 |
| Oct 11–17 | 0 | 0 | 30,824 |
| Oct 18–24 | 0 | 0 | 21,156 |
| Oct 25–31 | 0 | 0 | 19,021 |
| Nov 1–7 | 0 | 0 | 14,172 |
| Nov 8–14 | 0 | 0 | 12,621 |
| Nov 15–21 | 0 | 0 | 7,965 |
| Nov 22–28 | 0 | 0 | 8,136 |
| Nov 29 – Dec 5 | 0 | 0 | 6,083 |
| Dec 6–12 | 0 | 0 | 6,004 |
| Dec 13–19 | 0 | 0 | 5,423 |
| Dec 20–26 | 0 | 0 | 5,661 |
| Dec 27 – Jan 2 | 1 | 1 | 8,459 |
Reported in flower
Usually reported in flower late March to early May, middle week Apr 19–25.
From 220 records that show flowers. Not every photo of a plant in flower is marked as flowering, so this shows when people reported it in flower, not when it flowers.
Reported in fruit
Usually reported in fruit mid-April to early June, middle week May 10–16.
From 57 records that show fruit. Not every photo of a plant in fruit is marked as fruiting, so this shows when people reported it in fruit, not when it fruits.
What these results show
These results show when people recorded a species, not when or where it occurs. Missing weeks and low counts do not mean absence or scarcity, and counts are not abundance. Contributed records reflect where, when and what people chose to observe.
Identification
How to identify it
Often confused with
- lesser celandine Ficaria vernaOften confused in Ohio: 52 identifications in Ohio named one where the other was meant
- Creeping buttercup Ranunculus repens44 identifications worldwide named one where the other was meant
- creeping Jenny Lysimachia nummularia27 identifications worldwide named one where the other was meant
- Greater celandine Chelidonium majus22 identifications worldwide named one where the other was meant
- yellow woodland anemone Anemone ranunculoides20 identifications worldwide named one where the other was meant
From iNaturalist’s similar-species counts, refreshed monthly: confusions in Ohio first, then worldwide. Only species with an Ohio result are listed.
Months not reported
- Jan: no record
- Feb: recorded
- Mar: recorded
- Apr: recorded
- May: recorded
- Jun: recorded
- Jul: recorded
- Aug: no record
- Sep: no record
- Oct: recorded
- Nov: no record
- Dec: recorded
Not reported in Ohio in January, August to September and November, 2016 to 2025.
Land cover where it is recorded
| Land cover | Its recordsAll Ohio records |
|---|---|
| Forest | 51%31% |
| Wetland | 26%5% |
| Developed | 19%49% |
| Farmland | 4%11% |
| Grassland and shrub | 0.2%0.9% |
| Open water | 0.2%3% |
From 444 records placed within 100 m, beside all Ohio records placed the same way. People record where they go, so this shows where records come from, not where the species lives. Land cover: USGS Annual NLCD, 2025 (opens in a new tab)
Sources
Where these results come from
- Records from iNaturalist research-grade observations and expert-identified GBIF datasets, CC0, CC BY and CC BY-NC. Sources
- Seasons use the published method and its evidence thresholds. Methods
- See it on iNaturalist (opens in a new tab)OpenPhenology is independent and not affiliated with iNaturalist.
Records behind the Stark County result
25 records from 1 dataset.
- iNaturalist Research-grade Observations (opens in a new tab) · iNaturalist.org · 25 recordsiNaturalist contributors, iNaturalist (2026). iNaturalist Research-grade Observations. iNaturalist.org. Occurrence dataset https://doi.org/10.15468/ab3s5x accessed via GBIF.org on 2026-11-13.
To cite: the GBIF download doi:10.15468/dl.y2jkt8 (opens in a new tab).
A spreadsheet (CSV) with a link to each record, on iNaturalist or GBIF. Records whose location was hidden by the observer or the source are counted but not linked.