| Taxon | Collector | Location | Type Status | Barcode | |
|---|---|---|---|---|---|
| Placynthium nigrum (Huds.) Gray | J. K. England 5858 26 Feb 2016 | United States of America. Alabama. Jackson Co. 2.08 air mi NE of Princeton. ACES-Graham Farm and Nature Center. Along W side of Co. Rd. 27 approx. 0.44 mi NW of jct. with AL Hwy. 65. | 03303203 | ||
| Placynthium nigrum (Huds.) Gray | J. K. England 5886 with with Jamie England, 28 Feb 2016 | United States of America. Alabama. Franklin Co. 3.59 air mi WNW of Newburg. Along N side of AL Hwy. 24 approx. 0.56 mi W of jct. with Co. Rd. 83. | 03303206 | ||
| Placynthium nigrum (Huds.) Gray | J. Battaglia 2017-033 14 Jul 2017 | United States of America. New York. Jefferson Co. Town of Clayton, Lucky Star Ranch, open fields north of Lucky Star Lake. | 03303574 | ||
| Placynthium petersii (Nyl.) Burnham | J. C. Lendemer 52729 with C. Anderson Stewart, 21 May 2017 | United States of America. Alabama. Jackson Co. James D. Martin – Skyline Wildlife Management Area, N-facing slopes below Daniel Gap, W of access road 0.8 mi NE of jct w/ CR54, 0.07 mi S of jct w/ Poplar Springs Rd. | 03218124 |  | |
| Placynthium petersii (Nyl.) Burnham | J. C. Lendemer 52800 with C. Anderson Stewart, 21 May 2017 | United States of America. Alabama. Jackson Co. James D. Martin – Skyline Wildlife Management Area, W-facing slopes above Little Coon Creek, E of CR45 0.1 mi N of jct w/ CR567, 0.2 mi N of jct w/ Smalligan’s Steep, 1.5 mi N of Cave Spring. | 03218222 |  | |
| Placynthium petersii (Nyl.) Burnham | J. C. Lendemer 52892 with C. Anderson Stewart, 21 May 2017 | United States of America. Alabama. Jackson Co. James D. Martin – Skyline Wildlife Management Area, N-facing slopes of Crow Mountain, E of CR55 1.2 mi S of jct w/ CR53, 0.2 mi S of Low Gap. | 03218286 | ||
| Placynthium petersii (Nyl.) Burnham | C. J. Hansen 6396 15 Mar 2017 | United States of America. Alabama. Madison Co. Huntsville. Red Stone Arsenal, summit and surrounding environment of Madkin Mountain. | 03683742 | ||
| Placynthium nigrum (Huds.) Gray | R. C. Harris 62246 with 26th Tuckerman Workshop, 30 Mar 2017 | United States of America. Alabama. Bibb Co. Bibb County Glades TNC Preserve, 4.3 mi NW of AL25 on CR65/Bulldog Bend Road, then 0.7 mi SW on Fullman Lane, SW facing slope above Little Cahaba River. | 3809307 | ||
| Placynthium petersii (Nyl.) Burnham | J. C. Lendemer 55405 with E.A. Tripp, 13 Mar 2018 | United States of America. Tennessee. Greene Co. Cherokee National Forest, Chuckey Mountain, Dry Fork, W of FSR486, 0.1-0.2 mi S of Cedar Creek Cave Rd. | 03720724 | ||
| Placynthium nigrum (Huds.) Gray | J. C. Lendemer 55394 with E.A. Tripp, 13 Mar 2018 | United States of America. Tennessee. Greene Co. Cherokee National Forest, Chuckey Mountain, Dry Fork, W of FSR486, 0.1-0.2 mi S of Cedar Creek Cave Rd. | 03720735 | ||
| Placynthium petersii (Nyl.) Burnham | E. A. Tripp 1470 with J.C. Lendemer & A. Moroz, 13 Oct 2010 | United States of America. Tennessee. Blount Co. Great Smoky Mountains National Park, White Oak Sinks, manhole to blowhole. | 1220097 | ||
| Placynthium petersii (Nyl.) Burnham | E. A. Tripp 6508 with J. C. Lendemer, 24 Dec 2016 | United States of America. Alabama. Jackson Co. James D. Martin-Skyline Wildlife Management Area, slopes above E shore of Hurricane Creek, along Walls of Jericho Trail 0.5 mi W of AL79, W of Jericho. | 02796802 | ||
| Placynthium petersii (Nyl.) Burnham | E. A. Tripp 7298 10 May 2017 | United States of America. Alabama. Morgan Co. James D. Martin – Skyline Wildlife Management Area, N-facing slopes of Spring Hollow, 0.2 mi E of Tate Spring, S of Tate Cove Rd. 2.5 mi E of jct w/ Money Hollow Rd. and 2.6 mi W of jct w/ AL79. | 02797764 | ||
| Placynthium nigrum (Huds.) Gray | E. A. Tripp 7736 30 Mar 2016 | United States of America. Alabama. Bibb Co. Bibb County Glades TNC Preserve. E-facing slopes above W shore of Little Cahaba River. E of Fullman Lane, 0.7 mi S of CR65/Bulldog Bend Rd., 4.3 mi NW of AL25. | 03862274 |  | |
| Placynthium nigrum (Huds.) Gray | R. E. Riefner, Jr. 81-402 07 Jul 1981 | United States of America. Michigan. Mackinac Co. Bush Bay, near picnic area ca. 6 mi E of Cedarville, on M-134. | 1490237 |  | |
| Placynthium nigrum (Huds.) Gray | H. E. Hasse 102 1894 | United States of America. California. Santa Monica Mts. | 1490253 |  | |
| Placynthium nigrum (Huds.) Gray | H. E. Hasse Apr 1903 | United States of America. California. Ventura Co. North Fork Matilija Canon. | 1490255 |  | |
| Placynthium nigrum (Huds.) Gray | H. E. Hasse 524[803] Feb 1897 | United States of America. California. Santa Monica Mts. | 1490254 |  | |
| Placynthium petersii (Nyl.) Burnham | J. C. Lendemer 71801 20 Oct 2021 | United States of America. Tennessee. Sevier Co. Great Smoky Mountains National Park, Foothills Parkway, Cove Mountain, low W slopes of Buckeye Knob, below Piney Spur, 0.2 mi E of Katy Hollar Rd. | 04284788 |  | |
| Placynthium petersii (Nyl.) Burnham | I. Yoshimura 660382 with M.E. Hale, 11 Apr 1966 | United States of America. Virginia. Lee Co. 2 mi east of Dot, along Hwy. 58. | 03721611 | ||
| Placynthium flabellosum (Tuck.) Zahlbr. | J. C. Lendemer 60121 with R. Helsel, 16 Jun 2019 | United States of America. North Carolina. Haywood Co. Pisgah National Forest, Balsam Mountains, S-slopes of Nobreeches Ridge at confluence of East Fork of Pigeon River and Greasy Cove Prong, at jct of Bridges Camp Gap Trail and Greasy Cove Trail. | 04247301 |  | |
| Placynthium petersii (Nyl.) Burnham | A. C. Risk 22902 25 May 2018 | United States of America. Kentucky. Estill Co. Clay City Quad, Calloway Creek watershed, Camp Burnamwood property, 0.4 km southeast of Grassy Knob. | 04272903 |  | |
| Placynthium petersii (Nyl.) Burnham | A. C. Risk 23015 with with Kendall McDonald, 26 Jun 2018 | United States of America. Kentucky. Simpson Co. Auburn Quad, 5.2 km northeast of Pilot Knob, Flat Rock Glade State Nature Preserve. | 04272932 |  | |
| Placynthium nigrum (Huds.) Gray | E. A. Tripp 8595 13 Mar 2018 | United States of America. Tennessee. Greene Co. Cherokee National Forest, Chuckey Mountain, Dry Fork, W of FSR486, 0.1-0.2 mi S of Cedar Creek Cave Rd. | 03862652 |  | |
| Placynthium nigrum (Huds.) Gray | E. Lay 01-0753 18 Jul 2001 | United States of America. Vermont. Addison Co. Green Mountain National Forest. Salisbury and Leicester. Fall of Lana, Silver Lake and Leicester Hollow. To the falls, Cheshire Quartzite, then Phyllite with some marble. | 04470172 |  | |
| Placynthium nigrum (Huds.) Gray | J. Hollinger 24424 with P. Durr, K. Langdon, T. Howe, 10 Dec 2020 | United States of America. Tennessee. Blount Co. Foothills Parkway, near Walland, old quarry on south side of road just east of Little River. | 04274859 |  | |
| Placynthium nigrum (Huds.) Gray | E. Lay 01-0556 15 Sep 2001 | United States of America. New York. Jefferson Co. Chaumont. Three Mile Creek Barrens. TNC. Intersection of Robbins and Three Mile Creek Road. | 04276213 |  | |
| Placynthium stenophyllum (Tuck.) Fink | E. Lay 97-0078 23 May 1997 | United States of America. New York. Jefferson Co. Perch River Barrens east of NY 180, ca. 1 mi. NE of Limerick. | 04276284 |  | |
| Placynthium petersii (Nyl.) Burnham | E. Lay 97-0077 23 May 1997 | United States of America. New York. Jefferson Co. Perch River Barrens east of NY 180, ca. 1 mi. NE of Limerick. | 04469835 |  | |
| Placynthium nigrum (Huds.) Gray | E. Lay 01-0756 15 Sep 2001 | United States of America. New York. Jefferson Co. Lyme. Lucky Star Alvar. Northeast intersection of Root Rd. and Robinson Road. | 04276212 |  | |
| Placynthium nigrum (Huds.) Gray | E. Lay 97-0545 23 May 1997 | United States of America. New York. Jefferson Co. Perch River Barrens east of NY 180, ca. 1 mi. NE of Limerick. | 04276214 |  | |
| Placynthium nigrum (Huds.) Gray | E. Lay 97-0457 23 Sep 1997 | United States of America. New York. Jefferson Co. Limerick Cedars Preserve, N side of Ransom Road 1 mi NW of NY 180, 1.2 mi NE of NY 12E at Limerick. | 04469831 |  | |
| Placynthium nigrum (Huds.) Gray | M. K. Advaita 6018A 03 Jun 2007 | United States of America. North Dakota. Oliver Co. ca 2 mi SE of Hensler, The Nature Conservancy's Cross Ranch Preserve, South Unit. | 1079627 | ||
| Placynthium petersii (Nyl.) Burnham | S. Q. Beeching 14391 02 Dec 2012 | United States of America. Georgia. Floyd Co. Black's Bluff. | 04344372 | ||
| Placynthium nigrum (Huds.) Gray | S. Q. Beeching 14423 23 Nov 2012 | United States of America. Georgia. Walker Co. Pigeon Mountain. | 04344365 | ||
| Placynthium petersii (Nyl.) Burnham | M. E. Hale Jr. 3491 Jul 1954 | United States of America. Arkansas. Carroll Co. 8 mi. E of Eureka Springs. | |||
| Placynthium nigrum (Huds.) Gray var. nigrum | M. E. Hale Jr. 322 with Arctic Institute Expedition of 1950, 10 Aug 1950 | Canada. Nunavut. Baffin Island, Head of Clyde Fiord. | 1818489 | ||
| Placynthium asperellum (Ach.) Trevis. | 04439947 |  | |||
| Placynthium nigrum (Huds.) Gray | D. P. Waters 6616 04 Oct 2021 | United States of America. New Jersey. Hunterdon Co. Union Township, Spruce Run Recreation Area, north shore of Spruce Run Reservoir. | 04305411 |  | |
| Placynthium petersii (Nyl.) Burnham | M. F. Hodges 25882 16 Sep 2022 | United States of America. West Virginia. Randolph Co. Monongahela National Forest, Coberly Sods, E of Stuart Memorial Drive/FS91, drainage of tributary to Shavers Fork of the Cheat River. | 04288857 |  |
