Rattlesnake fern
Botrypus virginianus (L.) Michx.
Rattlesnake fern in all of Ohio- Kingdom
- Plantae
- Phylum
- Tracheophyta
- Class
- Polypodiopsida
- Order
- Ophioglossales
- Family
- Ophioglossaceae
- Genus
- Botrypus
Range
Where it is recorded
Season shown in 1 of Ohio's 88 counties. Explore Ohio
- No result yet (33)
- Recorded, too few records for a result (50)
- Recorded, season not shown (4)
- Season shown (1)
Counties as a table
| County | Records |
|---|---|
| Adams County | 21 · Recorded, season not shown |
| Allen County | Recorded, too few records for a result |
| Ashland County | Recorded, too few records for a result |
| Ashtabula County | No qualifying records yet |
| Athens County | 97 · 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 | Recorded, too few records for a result |
| 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 | Recorded, too few records for a result |
| 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 | 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 | 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 | 27 · Recorded, season not shown |
| Hancock County | No qualifying records yet |
| 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 | 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 | Recorded, too few records for a result |
| Jefferson County | Recorded, too few records for a result |
| Knox County | No qualifying records yet |
| 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 | Recorded, too few records for a result |
| 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 | No qualifying records yet |
| 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 | No qualifying records yet |
| Montgomery County | 20 · 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 | Recorded, too few records for a result |
| Ottawa County | No qualifying records yet |
| 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 | Recorded, too few records for a result |
| 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 | Recorded, too few records for a result |
| Seneca County | Recorded, too few records for a result |
| 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 | 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 | 22 · Season shown |
| Washington County | Recorded, too few records for a result |
| 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 Warren County
Mid-April to late August, middle week May 31 – Jun 6
Records per week from 22 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 22 dates. Latest record: July 2025.
Show as a table
| Week | Records of rattlesnake fern | 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 | 0 | 0 | 396 |
| Apr 5–11 | 0 | 0 | 254 |
| Apr 12–18 | 0 | 0 | 324 |
| Apr 19–25 | 2 | 1 | 336 |
| Apr 26 – May 2 | 2 | 2 | 539 |
| May 3–9 | 0 | 0 | 323 |
| May 10–16 | 2 | 2 | 423 |
| May 17–23 | 2 | 2 | 420 |
| May 24–30 | 1 | 1 | 378 |
| May 31 – Jun 6 | 4 | 3 | 696 |
| Jun 7–13 | 2 | 1 | 759 |
| Jun 14–20 | 1 | 1 | 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 | 1 | 1 | 564 |
| Jul 26 – Aug 1 | 1 | 1 | 530 |
| Aug 2–8 | 0 | 0 | 491 |
| Aug 9–15 | 2 | 2 | 720 |
| Aug 16–22 | 0 | 0 | 565 |
| Aug 23–29 | 0 | 0 | 534 |
| Aug 30 – Sep 5 | 2 | 1 | 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
No records here show flowers yet, so there is no flowering season to show. 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-September, middle week May 31 – Jun 6
Records per week from 625 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 387 dates. Latest record: November 2025.
Show as a table
| Week | Records of rattlesnake fern | 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 | 0 | 0 | 19,661 |
| Apr 5–11 | 1 | 1 | 26,860 |
| Apr 12–18 | 8 | 4 | 39,925 |
| Apr 19–25 | 41 | 7 | 41,623 |
| Apr 26 – May 2 | 58 | 9 | 56,391 |
| May 3–9 | 43 | 10 | 52,952 |
| May 10–16 | 47 | 10 | 53,785 |
| May 17–23 | 45 | 9 | 57,698 |
| May 24–30 | 58 | 9 | 54,651 |
| May 31 – Jun 6 | 61 | 10 | 53,099 |
| Jun 7–13 | 33 | 8 | 53,700 |
| Jun 14–20 | 28 | 7 | 56,625 |
| Jun 21–27 | 15 | 8 | 55,361 |
| Jun 28 – Jul 4 | 8 | 5 | 58,477 |
| Jul 5–11 | 10 | 5 | 61,336 |
| Jul 12–18 | 5 | 2 | 64,722 |
| Jul 19–25 | 10 | 5 | 69,753 |
| Jul 26 – Aug 1 | 9 | 5 | 59,416 |
| Aug 2–8 | 8 | 5 | 59,712 |
| Aug 9–15 | 15 | 8 | 55,994 |
| Aug 16–22 | 8 | 3 | 54,328 |
| Aug 23–29 | 21 | 6 | 51,772 |
| Aug 30 – Sep 5 | 15 | 6 | 57,167 |
| Sep 6–12 | 40 | 8 | 59,075 |
| Sep 13–19 | 8 | 5 | 54,543 |
| Sep 20–26 | 15 | 5 | 45,860 |
| Sep 27 – Oct 3 | 7 | 6 | 43,180 |
| Oct 4–10 | 2 | 2 | 37,841 |
| Oct 11–17 | 2 | 1 | 30,824 |
| Oct 18–24 | 0 | 0 | 21,156 |
| Oct 25–31 | 1 | 1 | 19,021 |
| Nov 1–7 | 3 | 2 | 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 | 0 | 0 | 8,459 |
Reported in flower
No records here show flowers yet, so there is no flowering season to show. 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.
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
- Cutleaf Grapefern Sceptridium dissectumOften confused in Ohio: 32 identifications in Ohio named one where the other was meant
- Common Tansy Tanacetum vulgare33 identifications worldwide named one where the other was meant
- lowland brittle fern Cystopteris protrusa27 identifications worldwide named one where the other was meant
- poison hemlock Conium maculatum26 identifications worldwide named one where the other was meant
- spinulose wood fern Dryopteris carthusiana25 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: no record
- Apr: recorded
- May: recorded
- Jun: recorded
- Jul: recorded
- Aug: recorded
- Sep: recorded
- Oct: recorded
- Nov: recorded
- Dec: no record
Not reported in Ohio in December to March, 2016 to 2025.
Land cover where it is recorded
| Land cover | Its recordsAll Ohio records |
|---|---|
| Forest | 90%31% |
| Developed | 8%49% |
| Wetland | 1%5% |
| Farmland | 0.3%11% |
From 321 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
22 records from 2 datasets.
- iNaturalist Research-grade Observations (opens in a new tab) · iNaturalist.org · 21 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 · 1 recordiNaturalist. 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.