Flowering plantsIn Coshocton County, Ohio

Large white trillium

Trillium grandiflorum (Michx.) Salisb.

Large white trillium in all of Ohio

Kingdom: Plantae
Phylum: Tracheophyta
Class: Liliopsida
Order: Liliales
Family: Melanthiaceae
Genus: Trillium

Near Coshocton County

Range

Where it is recorded

Season shown in 29 of Ohio's 88 counties. Explore Ohio

No result yet (7)
Recorded, too few records for a result (47)
Recorded, season not shown (5)
Season shown (29)

Boundaries: U.S. Census Bureau, 2025 Cartographic Boundary Files, 1:500,000. Show as a table

Counties as a table

large white trillium by Ohio county: records and mapped range
County	Records
Adams County	59 · Season shown
Allen County	Recorded, too few records for a result
Ashland County	27 · Season shown
Ashtabula County	27 · Season shown
Athens County	212 · Season shown
Auglaize County	Recorded, too few records for a result
Belmont County	Recorded, too few records for a result
Brown County	Recorded, too few records for a result
Butler County	23 · Season shown
Carroll County	Recorded, too few records for a result
Champaign County	26 · Recorded, season not shown
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	Recorded, too few records for a result
Coshocton County	22 · Recorded, season not shown
Crawford County	Recorded, too few records for a result
Cuyahoga County	171 · Season shown
Darke County	Recorded, too few records for a result
Defiance County	No qualifying records yet
Delaware County	63 · Season shown
Erie County	39 · Season shown
Fairfield County	35 · Recorded, season not shown
Fayette County	No qualifying records yet
Franklin County	87 · Season shown
Fulton County	Recorded, too few records for a result
Gallia County	Recorded, too few records for a result
Geauga County	53 · Season shown
Greene County	98 · Season shown
Guernsey County	Recorded, too few records for a result
Hamilton County	59 · Season shown
Hancock County	22 · Season shown
Hardin County	Recorded, too few records for a result
Harrison County	Recorded, too few records for a result
Henry County	No qualifying records yet
Highland County	82 · Season shown
Hocking County	97 · Season 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	Recorded, too few records for a result
Knox County	Recorded, too few records for a result
Lake County	86 · Season shown
Lawrence County	Recorded, too few records for a result
Licking County	36 · Season shown
Logan County	Recorded, too few records for a result
Lorain County	25 · Season shown
Lucas County	136 · Season shown
Madison County	Recorded, too few records for a result
Mahoning County	26 · Recorded, season not shown
Marion County	No qualifying records yet
Medina County	105 · Season shown
Meigs County	Recorded, too few records for a result
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	74 · Season shown
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	Recorded, too few records for a result
Ottawa County	Recorded, too few records for a result
Paulding County	No qualifying records yet
Perry County	Recorded, too few records for a result
Pickaway County	Recorded, too few records for a result
Pike County	Recorded, too few records for a result
Portage County	73 · Season shown
Preble County	Recorded, too few records for a result
Putnam County	No qualifying records yet
Richland County	25 · Season shown
Ross County	Recorded, too few records for a result
Sandusky County	Recorded, too few records for a result
Scioto County	42 · Season shown
Seneca County	Recorded, too few records for a result
Shelby County	Recorded, too few records for a result
Stark County	42 · Season shown
Summit County	332 · Season shown
Trumbull County	Recorded, too few records for a result
Tuscarawas County	24 · Season shown
Union County	Recorded, too few records for a result
Van Wert County	Recorded, too few records for a result
Vinton County	Recorded, too few records for a result
Warren County	40 · Recorded, season not shown
Washington County	Recorded, too few records for a result
Wayne County	82 · Season shown
Williams County	Recorded, too few records for a result
Wood County	63 · Season shown
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 Coshocton County

Not enough evidence

Most records come from a single year, so a season is not shown yet. Based on 22 records in 6 of the 10 years from 2016 to 2025, above the minimum of 20 records from 5 different years.

Show over the bars

Recording in Coshocton County · records of all species each week, 5,546 in all

Records per week from 22 records in 6 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

Records of large white trillium in Coshocton County each week, and records of all species
Week	Records of large white trillium	Years recorded	Records of all species
Jan 4–10	0	0	18
Jan 11–17	0	0	9
Jan 18–24	0	0	12
Jan 25–31	0	0	11
Feb 1–7	0	0	24
Feb 8–14	0	0	12
Feb 15–21	0	0	10
Feb 22–28	0	0	14
Mar 1–7	0	0	27
Mar 8–14	0	0	31
Mar 15–21	0	0	78
Mar 22–28	0	0	54
Mar 29 – Apr 4	0	0	68
Apr 5–11	2	2	116
Apr 12–18	4	3	155
Apr 19–25	8	4	186
Apr 26 – May 2	2	2	113
May 3–9	5	4	212
May 10–16	0	0	182
May 17–23	1	1	182
May 24–30	0	0	226
May 31 – Jun 6	0	0	101
Jun 7–13	0	0	102
Jun 14–20	0	0	205
Jun 21–27	0	0	182
Jun 28 – Jul 4	0	0	218
Jul 5–11	0	0	271
Jul 12–18	0	0	219
Jul 19–25	0	0	120
Jul 26 – Aug 1	0	0	266
Aug 2–8	0	0	270
Aug 9–15	0	0	152
Aug 16–22	0	0	192
Aug 23–29	0	0	222
Aug 30 – Sep 5	0	0	219
Sep 6–12	0	0	220
Sep 13–19	0	0	63
Sep 20–26	0	0	230
Sep 27 – Oct 3	0	0	113
Oct 4–10	0	0	134
Oct 11–17	0	0	45
Oct 18–24	0	0	57
Oct 25–31	0	0	74
Nov 1–7	0	0	27
Nov 8–14	0	0	25
Nov 15–21	0	0	19
Nov 22–28	0	0	11
Nov 29 – Dec 5	0	0	3
Dec 6–12	0	0	5
Dec 13–19	0	0	5
Dec 20–26	0	0	19
Dec 27 – Jan 2	0	0	17

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

Mid-April to mid-May, middle week Apr 26 – May 2

Middle week · Apr 26 – May 2

This week · Nov 8–14

Show over the bars

Recording in Ohio · records of all species each week, 1,691,199 in all

Records per week from 3,829 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 494 dates. Latest record: July 2025.

Show as a table

Records of large white trillium in Ohio each week, and records of all species
Week	Records of large white trillium	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	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	22	7	19,661
Apr 5–11	149	10	26,860
Apr 12–18	445	10	39,925
Apr 19–25	755	10	41,623
Apr 26 – May 2	954	10	56,391
May 3–9	713	10	52,952
May 10–16	476	10	53,785
May 17–23	206	10	57,698
May 24–30	51	9	54,651
May 31 – Jun 6	12	6	53,099
Jun 7–13	15	5	53,700
Jun 14–20	9	4	56,625
Jun 21–27	7	5	55,361
Jun 28 – Jul 4	3	3	58,477
Jul 5–11	2	2	61,336
Jul 12–18	0	0	64,722
Jul 19–25	2	2	69,753
Jul 26 – Aug 1	0	0	59,416
Aug 2–8	1	1	59,712
Aug 9–15	4	1	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	1	1	59,075
Sep 13–19	0	0	54,543
Sep 20–26	1	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	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 mid-April to mid-May, middle week Apr 26 – May 2.

From 1,872 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 late May to early July, middle week Jun 7–13.

From 31 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

Look-alikes

When

Land cover

Often confused with

drooping trillium Trillium flexipesOften confused in Ohio: 60 identifications in Ohio named one where the other was meant
red trillium Trillium erectumOften confused in Ohio: 21 identifications in Ohio named one where the other was meant
Jack-in-the-Pulpit Arisaema triphyllum38 identifications worldwide named one where the other was meant
snow trillium Trillium nivale38 identifications worldwide named one where the other was meant
toadshade Trillium sessile10 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: no record
Mar: recorded
Apr: recorded
May: recorded
Jun: recorded
Jul: recorded
Aug: recorded
Sep: recorded
Oct: no record
Nov: no record
Dec: recorded

Not reported in Ohio in January to February and October to November, 2016 to 2025.

Land cover where it is recorded

Land cover	Its recordsAll Ohio records
Forest	79%31%
Developed	13%49%
Wetland	6%5%
Farmland	2%11%
Open water	0.3%3%
Grassland and shrub	0.2%0.9%

From 1,965 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

3,829 records from 2 datasets.

iNaturalist Research-grade Observations (opens in a new tab) · iNaturalist.org · 3,803 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 · 26 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.