- Kingdom
- Plantae
- Phylum
- Tracheophyta
- Class
- Magnoliopsida
- Order
- Gentianales
- Family
- Rubiaceae
- Genus
- Houstonia
Range
Where it is recorded
Season shown in 8 of Ohio's 88 counties. Explore Ohio
- No result yet (38)
- Recorded, too few records for a result (37)
- Recorded, season not shown (5)
- Season shown (8)
Counties as a table
| County | Records |
|---|---|
| Adams County | 37 · Recorded, season not shown |
| Allen County | No qualifying records yet |
| Ashland County | 20 · Season shown |
| Ashtabula County | Recorded, too few records for a result |
| Athens County | 207 · Season shown |
| Auglaize County | No qualifying records yet |
| Belmont County | No qualifying records yet |
| Brown County | Recorded, too few records for a result |
| Butler County | No qualifying records yet |
| Carroll County | Recorded, too few records for a result |
| Champaign County | No qualifying records yet |
| Clark County | No qualifying records yet |
| Clermont County | No qualifying records yet |
| Clinton County | No qualifying records yet |
| Columbiana County | Recorded, too few records for a result |
| Coshocton County | Recorded, too few records for a result |
| Crawford County | Recorded, too few records for a result |
| Cuyahoga County | 184 · Season shown |
| 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 | Recorded, too few records for a result |
| Fulton County | No qualifying records yet |
| Gallia County | Recorded, too few records for a result |
| Geauga County | Recorded, too few records for a result |
| Greene County | Recorded, too few records for a result |
| Guernsey County | Recorded, too few records for a result |
| Hamilton County | Recorded, too few records for a result |
| Hancock County | No qualifying records yet |
| Hardin County | No qualifying records yet |
| Harrison County | Recorded, too few records for a result |
| Henry County | No qualifying records yet |
| Highland County | 35 · Recorded, season not shown |
| Hocking County | 58 · Recorded, season not shown |
| Holmes County | Recorded, too few records for a result |
| Huron County | Recorded, too few records for a result |
| Jackson County | Recorded, too few records for a result |
| Jefferson County | No qualifying records yet |
| Knox County | Recorded, too few records for a result |
| Lake County | Recorded, too few records for a result |
| Lawrence County | Recorded, too few records for a result |
| Licking County | Recorded, too few records for a result |
| Logan County | No qualifying records yet |
| Lorain County | 27 · Recorded, season not shown |
| Lucas County | No qualifying records yet |
| Madison County | No qualifying records yet |
| Mahoning County | Recorded, too few records for a result |
| Marion County | No qualifying records yet |
| Medina County | Recorded, too few records for a result |
| Meigs County | Recorded, too few records for a result |
| Mercer County | No qualifying records yet |
| Miami County | No qualifying records yet |
| Monroe County | Recorded, too few records for a result |
| Montgomery County | No qualifying records yet |
| Morgan County | Recorded, too few records for a result |
| Morrow County | Recorded, too few records for a result |
| Muskingum County | Recorded, too few records for a result |
| Noble County | No qualifying records yet |
| Ottawa County | No qualifying records yet |
| Paulding County | No qualifying records yet |
| Perry County | Recorded, too few records for a result |
| Pickaway County | No qualifying records yet |
| Pike County | Recorded, too few records for a result |
| Portage County | 34 · Season shown |
| Preble County | No qualifying records yet |
| Putnam County | No qualifying records yet |
| Richland County | Recorded, too few records for a result |
| Ross County | Recorded, too few records for a result |
| Sandusky County | No qualifying records yet |
| Scioto County | 42 · Season shown |
| Seneca County | No qualifying records yet |
| Shelby County | No qualifying records yet |
| Stark County | 30 · Recorded, season not shown |
| Summit County | 136 · Season shown |
| Trumbull County | Recorded, too few records for a result |
| Tuscarawas County | Recorded, too few records for a result |
| Union County | No qualifying records yet |
| Van Wert County | No qualifying records yet |
| Vinton County | 21 · Season shown |
| Warren County | No qualifying records yet |
| Washington County | Recorded, too few records for a result |
| Wayne County | 31 · Season shown |
| Williams County | No qualifying records yet |
| Wood County | No qualifying records yet |
| Wyandot County | No qualifying records yet |
No mapped range from the range source used, the USGS Gap Analysis Project, which maps land vertebrates only.
Season
When it is recorded
In Adams County
Not enough evidence
Records per week from 37 records in 7 of the 10 years from 2016 to 2025. Shows when people recorded it, not a season or how common it is.
Show as a table
| Week | Records of azure bluet | Years recorded | Records of all species |
|---|---|---|---|
| Jan 4–10 | 0 | 0 | 7 |
| Jan 11–17 | 0 | 0 | 6 |
| Jan 18–24 | 0 | 0 | 5 |
| Jan 25–31 | 0 | 0 | 6 |
| Feb 1–7 | 0 | 0 | 17 |
| Feb 8–14 | 0 | 0 | 8 |
| Feb 15–21 | 0 | 0 | 7 |
| Feb 22–28 | 0 | 0 | 13 |
| Mar 1–7 | 0 | 0 | 78 |
| Mar 8–14 | 0 | 0 | 65 |
| Mar 15–21 | 0 | 0 | 110 |
| Mar 22–28 | 0 | 0 | 139 |
| Mar 29 – Apr 4 | 2 | 2 | 243 |
| Apr 5–11 | 2 | 2 | 417 |
| Apr 12–18 | 13 | 5 | 599 |
| Apr 19–25 | 2 | 2 | 402 |
| Apr 26 – May 2 | 8 | 3 | 687 |
| May 3–9 | 5 | 3 | 520 |
| May 10–16 | 1 | 1 | 320 |
| May 17–23 | 2 | 2 | 258 |
| May 24–30 | 0 | 0 | 368 |
| May 31 – Jun 6 | 1 | 1 | 300 |
| Jun 7–13 | 0 | 0 | 221 |
| Jun 14–20 | 0 | 0 | 196 |
| Jun 21–27 | 1 | 1 | 386 |
| Jun 28 – Jul 4 | 0 | 0 | 420 |
| Jul 5–11 | 0 | 0 | 510 |
| Jul 12–18 | 0 | 0 | 643 |
| Jul 19–25 | 0 | 0 | 757 |
| Jul 26 – Aug 1 | 0 | 0 | 248 |
| Aug 2–8 | 0 | 0 | 780 |
| Aug 9–15 | 0 | 0 | 453 |
| Aug 16–22 | 0 | 0 | 428 |
| Aug 23–29 | 0 | 0 | 432 |
| Aug 30 – Sep 5 | 0 | 0 | 447 |
| Sep 6–12 | 0 | 0 | 236 |
| Sep 13–19 | 0 | 0 | 324 |
| Sep 20–26 | 0 | 0 | 308 |
| Sep 27 – Oct 3 | 0 | 0 | 114 |
| Oct 4–10 | 0 | 0 | 98 |
| Oct 11–17 | 0 | 0 | 106 |
| Oct 18–24 | 0 | 0 | 51 |
| Oct 25–31 | 0 | 0 | 119 |
| Nov 1–7 | 0 | 0 | 83 |
| Nov 8–14 | 0 | 0 | 81 |
| Nov 15–21 | 0 | 0 | 7 |
| Nov 22–28 | 0 | 0 | 6 |
| Nov 29 – Dec 5 | 0 | 0 | 92 |
| Dec 6–12 | 0 | 0 | 40 |
| Dec 13–19 | 0 | 0 | 11 |
| Dec 20–26 | 0 | 0 | 3 |
| Dec 27 – Jan 2 | 0 | 0 | 25 |
Reported in flower
Only 17 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 early June, middle week Apr 26 – May 2
Records per week from 1,620 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 497 dates. Latest record: November 2025.
Show as a table
| Week | Records of azure bluet | 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 | 1 | 1 | 5,888 |
| Feb 15–21 | 1 | 1 | 5,436 |
| Feb 22–28 | 0 | 0 | 6,846 |
| Mar 1–7 | 1 | 1 | 8,321 |
| Mar 8–14 | 0 | 0 | 10,384 |
| Mar 15–21 | 6 | 4 | 12,620 |
| Mar 22–28 | 7 | 4 | 13,949 |
| Mar 29 – Apr 4 | 20 | 6 | 19,661 |
| Apr 5–11 | 72 | 8 | 26,860 |
| Apr 12–18 | 217 | 10 | 39,925 |
| Apr 19–25 | 229 | 10 | 41,623 |
| Apr 26 – May 2 | 300 | 10 | 56,391 |
| May 3–9 | 187 | 10 | 52,952 |
| May 10–16 | 177 | 10 | 53,785 |
| May 17–23 | 142 | 10 | 57,698 |
| May 24–30 | 106 | 10 | 54,651 |
| May 31 – Jun 6 | 64 | 9 | 53,099 |
| Jun 7–13 | 35 | 9 | 53,700 |
| Jun 14–20 | 23 | 7 | 56,625 |
| Jun 21–27 | 9 | 3 | 55,361 |
| Jun 28 – Jul 4 | 4 | 3 | 58,477 |
| Jul 5–11 | 3 | 3 | 61,336 |
| Jul 12–18 | 1 | 1 | 64,722 |
| Jul 19–25 | 2 | 2 | 69,753 |
| Jul 26 – Aug 1 | 2 | 2 | 59,416 |
| Aug 2–8 | 0 | 0 | 59,712 |
| Aug 9–15 | 1 | 1 | 55,994 |
| Aug 16–22 | 1 | 1 | 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 | 2 | 2 | 54,543 |
| Sep 20–26 | 2 | 1 | 45,860 |
| Sep 27 – Oct 3 | 0 | 0 | 43,180 |
| Oct 4–10 | 0 | 0 | 37,841 |
| Oct 11–17 | 0 | 0 | 30,824 |
| Oct 18–24 | 3 | 2 | 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 | 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 | 1 | 1 | 5,423 |
| Dec 20–26 | 0 | 0 | 5,661 |
| Dec 27 – Jan 2 | 0 | 0 | 8,459 |
Reported in flower
Usually reported in flower early April to late May, middle week Apr 26 – May 2.
From 723 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
No fruiting season shown here. The weeks are still too uncertain to show a season.
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
- long-leaved bluets Houstonia longifolia21 identifications worldwide named one where the other was meant
- American field pansy Viola rafinesquei11 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: recorded
- Sep: recorded
- Oct: recorded
- Nov: recorded
- Dec: recorded
Not reported in Ohio in January, 2016 to 2025.
Land cover where it is recorded
| Land cover | Its recordsAll Ohio records |
|---|---|
| Forest | 65%31% |
| Developed | 24%49% |
| Farmland | 9%11% |
| Wetland | 2%5% |
| Grassland and shrub | 0.4%0.9% |
| Open water | 0.2%3% |
From 896 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 Ohio result
1,620 records from 2 datasets.
- iNaturalist Research-grade Observations (opens in a new tab) · iNaturalist.org · 1,607 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.
- iNaturalist observations (opens in a new tab) · iNaturalist.org · 13 recordsiNaturalist. Available from https://www.inaturalist.org. Accessed 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.