Season shown in 0 of Ohio's 88 counties. Explore Ohio
No result yet (57)
Recorded, too few records for a result (30)
Recorded, season not shown (1)
Season shown (0)
Boundaries: U.S. Census Bureau, 2025 Cartographic Boundary Files, 1:500,000. Show as a table
Counties as a table
river oats by Ohio county: records and mapped range
County
Records
Adams County
Recorded, too few records for a result
Allen County
No qualifying records yet
Ashland County
No qualifying records yet
Ashtabula County
No qualifying records yet
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
Recorded, too few records for a result
Carroll County
No qualifying records yet
Champaign County
No qualifying records yet
Clark County
Recorded, too few records for a result
Clermont County
Recorded, too few records for a result
Clinton County
Recorded, too few records for a result
Columbiana County
No qualifying records yet
Coshocton County
No qualifying records yet
Crawford County
Recorded, too few records for a result
Cuyahoga County
No qualifying records yet
Darke County
No qualifying records yet
Defiance County
No qualifying records yet
Delaware County
Recorded, too few records for a result
Erie County
No qualifying records yet
Fairfield County
No qualifying records yet
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
No qualifying records yet
Greene County
Recorded, too few records for a result
Guernsey County
Recorded, too few records for a result
Hamilton County
60 · Recorded, season not shown
Hancock County
Recorded, too few records for a result
Hardin County
Recorded, too few records for a result
Harrison County
No qualifying records yet
Henry County
No qualifying records yet
Highland County
No qualifying records yet
Hocking County
No qualifying records yet
Holmes County
No qualifying records yet
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
Recorded, too few records for a result
Lawrence County
No qualifying records yet
Licking County
Recorded, too few records for a result
Logan County
No qualifying records yet
Lorain County
No qualifying records yet
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
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
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
No qualifying records yet
Sandusky County
No qualifying records yet
Scioto County
Recorded, too few records for a result
Seneca County
No qualifying records yet
Shelby County
No qualifying records yet
Stark County
Recorded, too few records for a result
Summit County
Recorded, too few records for a result
Trumbull County
No qualifying records yet
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
Recorded, too few records for a result
Williams County
No qualifying records yet
Wood County
Recorded, too few records for a result
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 Ohio
Early July to late November, middle week Aug 30 – Sep 5
Middle week · Aug 30 – Sep 5
This week · Nov 8–14
JanFebMarAprMayJunJulAugSepOctNovDec
Show over the bars
Recording in Ohio · records of all species each week, 1,691,199 in all
Records per week from 264 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 225 dates. Latest record: December 2025.
Show as a table
Records of river oats in Ohio each week, and records of all species
Week
Records of river oats
Years recorded
Records of all species
Jan 4–10
0
0
6,211
Jan 11–17
1
1
5,146
Jan 18–24
1
1
4,645
Jan 25–31
0
0
4,698
Feb 1–7
1
1
6,023
Feb 8–14
0
0
5,888
Feb 15–21
2
2
5,436
Feb 22–28
0
0
6,846
Mar 1–7
0
0
8,321
Mar 8–14
0
0
10,384
Mar 15–21
0
0
12,620
Mar 22–28
0
0
13,949
Mar 29 – Apr 4
0
0
19,661
Apr 5–11
1
1
26,860
Apr 12–18
0
0
39,925
Apr 19–25
0
0
41,623
Apr 26 – May 2
0
0
56,391
May 3–9
2
2
52,952
May 10–16
0
0
53,785
May 17–23
0
0
57,698
May 24–30
1
1
54,651
May 31 – Jun 6
1
1
53,099
Jun 7–13
0
0
53,700
Jun 14–20
0
0
56,625
Jun 21–27
2
2
55,361
Jun 28 – Jul 4
2
2
58,477
Jul 5–11
10
6
61,336
Jul 12–18
10
5
64,722
Jul 19–25
16
6
69,753
Jul 26 – Aug 1
18
7
59,416
Aug 2–8
21
5
59,712
Aug 9–15
14
8
55,994
Aug 16–22
9
4
54,328
Aug 23–29
15
5
51,772
Aug 30 – Sep 5
18
7
57,167
Sep 6–12
23
7
59,075
Sep 13–19
14
6
54,543
Sep 20–26
12
7
45,860
Sep 27 – Oct 3
17
6
43,180
Oct 4–10
7
6
37,841
Oct 11–17
12
7
30,824
Oct 18–24
7
3
21,156
Oct 25–31
3
3
19,021
Nov 1–7
3
3
14,172
Nov 8–14
2
2
12,621
Nov 15–21
4
3
7,965
Nov 22–28
3
3
8,136
Nov 29 – Dec 5
4
2
6,083
Dec 6–12
1
1
6,004
Dec 13–19
0
0
5,423
Dec 20–26
1
1
5,661
Dec 27 – Jan 2
6
4
8,459
Reported in flower
Only 2 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 18 records here show fruit, too few to show a fruiting season. 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.
Identification
How to identify it
Telling it apart
From what Ohio’s records show. Only what the records support is shown.
river caneArundinaria gigantea26 identifications worldwide named one where the other was meant
deertongueDichanthelium clandestinum21 identifications worldwide named one where the other was meant
Japanese stiltgrassMicrostegium vimineum17 identifications worldwide named one where the other was meant
Long-awned Wood GrassBrachyelytrum erectum13 identifications worldwide named one where the other was meant
white grassLeersia virginica12 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: no record
Apr: recorded
May: recorded
Jun: recorded
Jul: recorded
Aug: recorded
Sep: recorded
Oct: recorded
Nov: recorded
Dec: recorded
Not reported in Ohio in March, 2016 to 2025.
Land cover where it is recorded
Land cover
Its recordsAll Ohio records
Developed
55%49%
Forest
37%31%
Farmland
6%11%
Open water
2%3%
Wetland
1%5%
From 183 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
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.
