| Taxon | Collector | Location | Type Status | Barcode | |
|---|---|---|---|---|---|
| Opegrapha diffracticola R.C.Harris & Ladd | W. R. Buck 42707 03 Nov 2002 | United States of America. Missouri. Crawford Co. Onondaga Cave State Park, W of MO H, near Picnic Area along Meramec River. | 635472 | ||
| Opegrapha diffracticola R.C.Harris & Ladd | W. G. Farlow 10 Dec 1879 | United States of America. Vermont. Addison Co. Monkton. | 799602 | ||
| Opegrapha diffracticola R.C.Harris & Ladd | R. C. Harris 45945 28 Apr 2002 | United States of America. Wisconsin. Vilas Co. Town of Arbor Vitae, Northern Highland State Forest, Trout Lake Conifer Swamp State Natural Area, just N of Co. Hwy M at E end of Perch Lane. | 799604 | ||
| Opegrapha diffracticola R.C.Harris & Ladd | W. R. Buck 41783A 29 Apr 2002 | United States of America. Wisconsin. Oneida Co. Town of Minocqua, Patterson Hemlocks State Natural Area, 1.2 mi S of St. Hwy 70 on West Clear Lake Road. | 799606 | ||
| Opegrapha diffracticola R.C.Harris & Ladd | R. C. Harris 46527 04 Nov 2002 | United States of America. Missouri. Maries Co. Spring Creek Gap Conservation Area east of County Road 340 (Old Hwy 63), ca. ½ mile north of US 63. | 799607 | ||
| Opegrapha diffracticola R.C.Harris & Ladd | R. C. Harris 46527 04 Nov 2002 | United States of America. Missouri. Maries Co. Spring Creek Gap Conservation Area east of County Road 340 (Old Hwy 63), ca. ½ mile north of US 63. | 799608 | ||
| Opegrapha diffracticola R.C.Harris & Ladd | R. C. Harris 44753 03 Nov 2000 | United States of America. Missouri. Barry Co. Roaring River State Park, ravine N of cabins NW of Nature Center along CR F. | 799609 | ||
| Opegrapha diffracticola R.C.Harris & Ladd | R. C. Harris 44679 02 Nov 2000 | United States of America. Arkansas. Madison Co. Madison County Wildlife Management Area, along Madison County road 30, ca. 3.2 mi east of Arkansas hwy 23. | 799610 | ||
| Opegrapha diffracticola R.C.Harris & Ladd | R. C. Harris 21592-A 25 Apr 1988 | United States of America. Arkansas. Stone Co. Ozark National Forest, Gunner Pool Recreation Area: along Little Sylamore Creek. | 799611 | ||
| Opegrapha diffracticola R.C.Harris & Ladd | R. C. Harris 40523-A 17 Apr 1997 | United States of America. Missouri. Oregon Co. Mark Twain National Forest, Falling Spring, ca. 2.4 mi E of MO 19 on Forest Service Road 3170/3164. | 799612 | ||
| Opegrapha diffracticola R.C.Harris & Ladd | R. C. Harris 44238-B 30 Oct 2000 | United States of America. Oklahoma. Cherokee Co. J. T. Nickel Family Nature and Wildlife Preserve (J5 Ranch), ca. 7 mi NE of Tahlequah, Tully Hollow. | 799613 | ||
| Opegrapha diffracticola R.C.Harris & Ladd | R. C. Harris 44273-A 30 Oct 2000 | United States of America. Oklahoma. Cherokee Co. J. T. Nickel Family Nature and Wildlife Preserve (J5 Ranch), ca. 7 mi NE of Tahlequah, Tully Hollow. | 799614 | ||
| Opegrapha diffracticola R.C.Harris & Ladd | R. C. Harris 47619-A 21 May 2003 | United States of America. Missouri. Christian Co. Mark Twain National Forest, S of Chadwick Road at jct of Monarch Road, 2.6 mi W of MO UU, above Harmon Spring. | 799615 | ||
| Opegrapha diffracticola R.C.Harris & Ladd | R. C. Harris 44745-B 03 Nov 2000 | United States of America. Missouri. Barry Co. Roaring River State Park, ravine N of cabins NW of Nature Center along CR F. | 799616 | ||
| Opegrapha diffracticola R.C.Harris & Ladd | R. C. Harris 46555 04 May 2002 | United States of America. Missouri. Maries Co. Spring Creek Gap Conservation Area east of County Road 340 (Old Hwy 63), ca. ½ mile north of US 63. | holotype | 799618 |  |
| Opegrapha diffracticola R.C.Harris & Ladd | W. R. Buck 48590 15 Apr 2005 | United States of America. Missouri. Morgan Co. Frank E. Carpenter Memorial Conservation Area, along Possum Trot Road, 1.9 mi SW of S end of Hwy T. | 729932 | ||
| Opegrapha diffracticola R.C.Harris & Ladd | W. R. Buck 48604A 15 Apr 2005 | United States of America. Missouri. Morgan Co. Frank E. Carpenter Memorial Conservation Area, along Possum Trot Road, 1.9 mi SW of S end of Hwy T. | 729943 | ||
| Opegrapha diffracticola R.C.Harris & Ladd | R. C. Harris 51115-A 18 Apr 2005 | United States of America. Arkansas. Searcy Co. Buffalo National River, SE of Maumee South Campground, along Co. Rd. 52, 5 mi NNW of AR 27. | 741620 | ||
| Opegrapha diffracticola R.C.Harris & Ladd | R. C. Harris 48909-A 14 Apr 2004 | United States of America. Oklahoma. Cherokee Co. Cookson Wildlife Management Area, W of Blue Top Road, 2 mi S of headquarters. | 752951 | ||
| Opegrapha diffracticola R.C.Harris & Ladd | R. C. Harris 49424-A 17 Apr 2004 | United States of America. Arkansas. Benton Co. Hobbs State Park-Conservation Area, along Page Sawmill Road, 0.35 mi NW of jct with Rambo Road. | 757591 | ||
| Opegrapha diffracticola R.C.Harris & Ladd | R. C. Harris 52020 25 Mar 2006 | United States of America. Missouri. Gasconade Co. Canaan Conservation Area, vicinity of parking area at end of Bock Road (CR 434)/Boettcher Road (CR 435), 2 mi E of Hwy A, ca. 3 mi N of Bland, along Sulphur Branch. | 931995 | ||
| Opegrapha diffracticola R.C.Harris & Ladd | C. M. Wetmore 84861 26 May 2000 | United States of America. Arkansas. Newton Co. Ozark National Forest, Upper Buffalo river Wilderness Area. Half mile E of Ryker. | 799617 |