Great waterleaf
Hydrophyllum appendiculatum Michx.
Great waterleaf in all of Ohio- Kingdom
- Plantae
- Phylum
- Tracheophyta
- Class
- Magnoliopsida
- Order
- Boraginales
- Family
- Hydrophyllaceae
- Genus
- Hydrophyllum
Range
Where it is recorded
Season shown in 5 of Ohio's 88 counties. Explore Ohio
- No result yet (40)
- Recorded, too few records for a result (40)
- Recorded, season not shown (3)
- Season shown (5)
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 | No qualifying records yet |
| Ashtabula County | No qualifying records yet |
| Athens County | 34 · Recorded, season not shown |
| Auglaize County | No qualifying records yet |
| Belmont County | Recorded, too few records for a result |
| Brown County | Recorded, too few records for a result |
| Butler County | 30 · Season shown |
| Carroll County | No qualifying records yet |
| Champaign County | Recorded, too few records for a result |
| Clark County | Recorded, too few records for a result |
| Clermont County | 51 · Season shown |
| Clinton County | Recorded, too few records for a result |
| Columbiana County | Recorded, too few records for a result |
| Coshocton County | No qualifying records yet |
| Crawford County | Recorded, too few records for a result |
| Cuyahoga County | Recorded, too few records for a result |
| Darke County | No qualifying records yet |
| 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 | 64 · Season shown |
| Fulton County | Recorded, too few records for a result |
| Gallia County | No qualifying records yet |
| Geauga County | No qualifying records yet |
| Greene County | 40 · Recorded, season not shown |
| Guernsey County | No qualifying records yet |
| Hamilton County | 186 · Season shown |
| Hancock County | Recorded, too few records for a result |
| Hardin County | No qualifying records yet |
| Harrison County | Recorded, too few records for a result |
| Henry County | No qualifying records yet |
| Highland County | Recorded, too few records for a result |
| Hocking County | Recorded, too few records for a result |
| Holmes County | Recorded, too few records for a result |
| Huron County | No qualifying records yet |
| Jackson County | No qualifying records yet |
| Jefferson County | No qualifying records yet |
| Knox County | Recorded, too few records for a result |
| Lake County | No qualifying records yet |
| Lawrence County | Recorded, too few records for a result |
| 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 | No qualifying records yet |
| Marion County | No qualifying records yet |
| Medina County | Recorded, too few records for a result |
| Meigs County | No qualifying records yet |
| Mercer County | No qualifying records yet |
| Miami County | Recorded, too few records for a result |
| Monroe County | Recorded, too few records for a result |
| Montgomery County | 22 · Recorded, season not shown |
| Morgan County | Recorded, too few records for a result |
| Morrow County | Recorded, too few records for a result |
| Muskingum County | No qualifying records yet |
| Noble County | No qualifying records yet |
| Ottawa County | Recorded, too few records for a result |
| Paulding County | No qualifying records yet |
| Perry County | No qualifying records yet |
| Pickaway County | Recorded, too few records for a result |
| Pike County | Recorded, too few records for a result |
| Portage County | No qualifying records yet |
| Preble County | Recorded, too few records for a result |
| Putnam County | No qualifying records yet |
| Richland County | No qualifying records yet |
| 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 | Recorded, too few records for a result |
| Summit County | No qualifying records yet |
| Trumbull County | No qualifying records yet |
| Tuscarawas County | No qualifying records yet |
| Union County | No qualifying records yet |
| Van Wert County | Recorded, too few records for a result |
| Vinton County | No qualifying records yet |
| Warren County | 25 · Season shown |
| Washington County | Recorded, too few records for a result |
| Wayne County | No qualifying records yet |
| Williams County | No qualifying records yet |
| Wood County | Recorded, too few records for a result |
| 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 Warren County
Mid-April to early June, middle week May 10–16
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 23 dates. Latest record: June 2025.
Show as a table
| Week | Records of great waterleaf | Years recorded | Records of all species |
|---|---|---|---|
| Jan 4–10 | 0 | 0 | 108 |
| Jan 11–17 | 0 | 0 | 29 |
| Jan 18–24 | 0 | 0 | 28 |
| Jan 25–31 | 0 | 0 | 37 |
| Feb 1–7 | 0 | 0 | 23 |
| Feb 8–14 | 0 | 0 | 38 |
| Feb 15–21 | 0 | 0 | 66 |
| Feb 22–28 | 0 | 0 | 65 |
| Mar 1–7 | 0 | 0 | 53 |
| Mar 8–14 | 0 | 0 | 70 |
| Mar 15–21 | 0 | 0 | 116 |
| Mar 22–28 | 0 | 0 | 117 |
| Mar 29 – Apr 4 | 1 | 1 | 396 |
| Apr 5–11 | 0 | 0 | 254 |
| Apr 12–18 | 1 | 1 | 324 |
| Apr 19–25 | 0 | 0 | 336 |
| Apr 26 – May 2 | 0 | 0 | 539 |
| May 3–9 | 5 | 3 | 323 |
| May 10–16 | 6 | 5 | 423 |
| May 17–23 | 3 | 2 | 420 |
| May 24–30 | 2 | 1 | 378 |
| May 31 – Jun 6 | 5 | 4 | 696 |
| Jun 7–13 | 2 | 2 | 759 |
| Jun 14–20 | 0 | 0 | 727 |
| Jun 21–27 | 0 | 0 | 558 |
| Jun 28 – Jul 4 | 0 | 0 | 552 |
| Jul 5–11 | 0 | 0 | 695 |
| Jul 12–18 | 0 | 0 | 643 |
| Jul 19–25 | 0 | 0 | 564 |
| Jul 26 – Aug 1 | 0 | 0 | 530 |
| Aug 2–8 | 0 | 0 | 491 |
| Aug 9–15 | 0 | 0 | 720 |
| Aug 16–22 | 0 | 0 | 565 |
| Aug 23–29 | 0 | 0 | 534 |
| Aug 30 – Sep 5 | 0 | 0 | 719 |
| Sep 6–12 | 0 | 0 | 619 |
| Sep 13–19 | 0 | 0 | 584 |
| Sep 20–26 | 0 | 0 | 390 |
| Sep 27 – Oct 3 | 0 | 0 | 403 |
| Oct 4–10 | 0 | 0 | 264 |
| Oct 11–17 | 0 | 0 | 277 |
| Oct 18–24 | 0 | 0 | 266 |
| Oct 25–31 | 0 | 0 | 204 |
| Nov 1–7 | 0 | 0 | 159 |
| Nov 8–14 | 0 | 0 | 141 |
| Nov 15–21 | 0 | 0 | 78 |
| Nov 22–28 | 0 | 0 | 220 |
| Nov 29 – Dec 5 | 0 | 0 | 53 |
| Dec 6–12 | 0 | 0 | 58 |
| Dec 13–19 | 0 | 0 | 45 |
| Dec 20–26 | 0 | 0 | 75 |
| Dec 27 – Jan 2 | 0 | 0 | 140 |
Reported in flower
Only 3 records here show flowers, too few to show a flowering season. One needs at least 20 records from 5 different years.
Reported in fruit
No records here show fruit yet, so there is no fruiting season to show. One needs at least 20 records from 5 different years.
In Ohio
Early April to late May, middle week May 10–16
Records per week from 777 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 333 dates. Latest record: October 2025.
Show as a table
| Week | Records of great waterleaf | Years recorded | Records of all species |
|---|---|---|---|
| Jan 4–10 | 0 | 0 | 6,211 |
| Jan 11–17 | 1 | 1 | 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 | 3 | 3 | 6,846 |
| Mar 1–7 | 1 | 1 | 8,321 |
| Mar 8–14 | 0 | 0 | 10,384 |
| Mar 15–21 | 3 | 3 | 12,620 |
| Mar 22–28 | 13 | 4 | 13,949 |
| Mar 29 – Apr 4 | 11 | 4 | 19,661 |
| Apr 5–11 | 13 | 8 | 26,860 |
| Apr 12–18 | 11 | 6 | 39,925 |
| Apr 19–25 | 28 | 8 | 41,623 |
| Apr 26 – May 2 | 83 | 7 | 56,391 |
| May 3–9 | 146 | 8 | 52,952 |
| May 10–16 | 154 | 9 | 53,785 |
| May 17–23 | 149 | 10 | 57,698 |
| May 24–30 | 80 | 9 | 54,651 |
| May 31 – Jun 6 | 45 | 8 | 53,099 |
| Jun 7–13 | 10 | 7 | 53,700 |
| Jun 14–20 | 10 | 4 | 56,625 |
| Jun 21–27 | 3 | 2 | 55,361 |
| Jun 28 – Jul 4 | 1 | 1 | 58,477 |
| Jul 5–11 | 2 | 2 | 61,336 |
| Jul 12–18 | 0 | 0 | 64,722 |
| Jul 19–25 | 1 | 1 | 69,753 |
| Jul 26 – Aug 1 | 1 | 1 | 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 | 1 | 1 | 57,167 |
| Sep 6–12 | 1 | 1 | 59,075 |
| Sep 13–19 | 1 | 1 | 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 | 1 | 1 | 30,824 |
| Oct 18–24 | 0 | 0 | 21,156 |
| Oct 25–31 | 1 | 1 | 19,021 |
| Nov 1–7 | 0 | 0 | 14,172 |
| Nov 8–14 | 1 | 1 | 12,621 |
| Nov 15–21 | 1 | 1 | 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 | 0 | 0 | 8,459 |
Reported in flower
No flowering season shown here. Most records come from a single year, so a season is not shown yet.
Reported in fruit
No records here show fruit yet, so there is no fruiting season to show. One needs at least 20 records from 5 different years.
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.
Relatives
In the same genus
Other Hydrophyllum recorded in Warren County
Identification
How to identify it
Often confused with
- Large-leaf water leaf Hydrophyllum macrophyllumOften confused in Ohio: 54 identifications in Ohio named one where the other was meant
- Broad-leaf Waterleaf Hydrophyllum canadenseOften confused in Ohio: 39 identifications in Ohio named one where the other was meant
- Virginia waterleaf Hydrophyllum virginianumOften confused in Ohio: 12 identifications in Ohio named one where the other was meant
- Purple Phacelia Phacelia bipinnatifidaOften confused in Ohio: 10 identifications in Ohio named one where the other was meant
- Miami Mist Phacelia purshii17 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: recorded
- Feb: recorded
- Mar: recorded
- Apr: recorded
- May: recorded
- Jun: recorded
- Jul: recorded
- Aug: no record
- Sep: recorded
- Oct: recorded
- Nov: recorded
- Dec: no record
Not reported in Ohio in August and December, 2016 to 2025.
Land cover where it is recorded
| Land cover | Its recordsAll Ohio records |
|---|---|
| Forest | 80%31% |
| Developed | 17%49% |
| Farmland | 2%11% |
| Wetland | 1%5% |
From 465 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 Warren 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.