| 0 | PI 691846 | 'Kirigami' | Origanum sp. | Illinois, United States | PVPO | | Not Available | 2019 | DEVELOPED | | | | | | Cultivar | | 2097471 | PI 691846 |
| 1 | PI 649694 | Index Seminum 264 | Origanum vulgare L. subsp. vulgare | Opolskie, Poland | NC7 |  | | 2002 | COLLECTED | 10/04/2001 | Luczyce. | | | | Wild material | | 1640381 | PI 649694 |
| 2 | PI 636385 | Index Seminum 256 | Origanum vulgare L. subsp. vulgare | Pest, Hungary | NC7 |  | | 1998 | COLLECTED | 1997 | Near Vac, on the southern slopes of Szarvashegy Hill, Mt. Naszaly. | 47.78333333, 19.13333333 | | Dry, thermophilous oak wood. Steep slope with a southern exposure. Growing on dolomite. | Wild material | | 1558923 | PI 636385 |
| 3 | PI 636383 | Index Seminum 143 | Origanum vulgare L. | Grand-Est, France | NC7 | | | 1998 | COLLECTED | PRE 1998 | Near Bernardswiller. | 48.45000000, 7.46666667 | | | Wild material | | 1557902 | PI 636383 |
| 4 | PI 636384 | Index Seminum 144 | Origanum vulgare L. | Grand-Est, France | NC7 |  | | 1998 | COLLECTED | PRE 1998 | Near Dorlisheim. | 48.53333333, 7.48333333 | | | Wild material | | 1557903 | PI 636384 |
| 5 | PI 603145 | MLA 960805 | Origanum vulgare L. | Almaty oblysy, Kazakhstan | NC7 | | | 1997 | COLLECTED | 1996 | Khrebet Dzhungarskiy Alatau (mountains). Talydqorghan | 45.62666667, 80.92361111 | 1260 | | Wild material | | 1545389 | PI 603145 |
| 6 | PI 633643 | Rigon | Origanum vulgare L. | Albania | NC7 | | | 1996 | COLLECTED | NEAR 08/30/1996 | Trip report states "Village of Bershej, Mat District. along road to Peshkopi." The GPS coordinates do not match the site description and no records of the Villiage of Bershej could be found. The villiage name may have been Burgajet, which is on road SH36 between Tirana and Peshkopi, about 5 miles from the GPS coordinates. Note added by D.L Barney 2-10-2015. | 41.53388889, 20.07888889 | 270 | Frequent. Highly eroded hillside along irrigation channel. | Wild material | Plant height 20-40cm, erect. Flowering May to September. | 1531343 | PI 633643 |
| 7 | PI 593738 | Index Seminum 335 | Origanum vulgare L. | Yunnan Sheng, China | NC7 |  | | 1994 | COLLECTED | 1993 | Hsi-Shan near Kunming. | | 2100 | Bush and montane meadows at the clearings of Pinus armandii-Keteleeria evelyana forest on limestone. | Wild material | | 1087597 | PI 593738 |
| 8 | PI 649693 | Index Seminum 376 | Origanum vulgare L. subsp. vulgare | Sachsen-Anhalt, Germany | NC7 | | | 1993 | COLLECTED | | Mertenforf. | | | | Wild material | | 1086138 | PI 649693 |
| 9 | PI 636382 | Index Seminum 66 | Origanum vulgare L. | Switzerland | NC7 | | | 1993 | COLLECTED | | Foot of Jura Mountains. | | 600 | | Wild material | | 1085988 | PI 636382 |
| 10 | PI 649692 | Index Seminum 3104 | Origanum vulgare L. subsp. vulgare | Ukraine | NC7 | | | 1992 | COLLECTED | | Leopolitanis region. | | | | Wild material | | 1084022 | PI 649692 |
| 11 | PI 636381 | Index Seminum 40 | Origanum vulgare L. | Bydgoszcz, Poland | NC7 | | | 1991 | COLLECTED | | Starogrod, Wojewodztwo. | 53.31666667, 18.38333333 | | | Wild material | | 1080084 | PI 636381 |
| 12 | PI 593731 | Index Seminum 341 | Origanum vulgare L. subsp. vulgare | North Moravia, Czech Republic | NC7 |  | | 1990 | COLLECTED | | Sumperk - surroundings of the Travna village. | | 500 | | Wild material | | 1062662 | PI 593731 |
| 13 | PI 440579 | | Origanum vulgare L. subsp. gracile (K. Koch) Ietsw. | Former, Soviet Union | NC7 |  | | 1978 | COLLECTED | 08/25/1977 | Dry hillside, 35km NW of Victory Collective Farm Headquarter s | | | | | Plants woody, fine-stemmed, to 60cm tall. | 1335515 | PI 440579 |
| 14 | PI 440580 | | Origanum vulgare L. subsp. gracile (K. Koch) Ietsw. | Former, Soviet Union | NC7 | | | 1978 | COLLECTED | 08/26/1977 | Low mountains, about 25km SE of Victory Collective Farm Head quarters | | 1400 | | | Moist slope. Plants to 50cm tall. | 1335516 | PI 440580 |
| 15 | PI 384485 | | Origanum vulgare L. subsp. hirtum (Link) Ietsw. | Greece | NC7 |  | | 1974 | DONATED | 01/03/1974 | | | | | | | 1288583 | PI 384485 |
| 16 | PI 383835 | | Origanum vulgare L. | Former Serbia and Montenegro | NC7 | | | 1973 | COLLECTED | | | | | | | | 1287987 | PI 383835 |
| 17 | PI 325450 | Chebret | Origanum vulgare L. | Russian Federation | | | Historic | 1968 | COLLECTED | | Collective farm near Bekeshevskaya village. Stravropol region. | | 540 | | | Seed from: Seeds from many plants. Plants prostrate, possibly stoloniferous, good ground cover; leaves very fragrant. Reportedly grows on dry soils. | 1241444 | PI 325450 |
| 18 | PI 325451 | BN-18692-70 | Origanum vulgare L. | Russian Federation | | | Historic | 1968 | COLLECTED | | North slope, near road, 3 km southeast of Kislovodsk. Stavropol region. | | | | | Perennial, determinate, to 1 m. high. Leaves and seeds very fragrant. | 1241445 | PI 325451 |
| 19 | PI 302814 | | Origanum dictamnus L. | Kríti, Greece | | | Historic | 1964 | COLLECTED | | | | | | | | 1680241 | PI 302814 |
| 20 | PI 149604 | | Origanum vulgare L. | Maryland, United States | | | Historic | 1944 | COLLECTED | | | | | | | | 1884399 | PI 149604 |
| 21 | PI 123341 | No. 2830 | Origanum vulgare L. | Turkey | | | Historic | 1937 | COLLECTED | 09/12/1936 | Yalova Baths, Kaplijalari | | | | | | 1834956 | PI 123341 |
| 22 | PI 20886 | | Origanum majorana L. | District of Columbia, United States | | | Historic | 1907 | COLLECTED | | | | | | | | 1533026 | PI 20886 |
| 23 | PI 12422 | | Origanum vulgare L. | Île-de-France, France | | | Historic | 1904 | COLLECTED | | | | | | | | 1556420 | PI 12422 |
| 24 | NA 88869 | 'Drops of Jupiter' | Origanum vulgare L. subsp. vulgare | Michigan, United States | NA | | Not Available | 2024 | DEVELOPED | PRE 03/2024 | | | | | Cultivar | Full name as recorded at the U.S. National Arboretum: Origanum vulgare subsp. vulgare 'Drops of Jupiter' | 2190934 | NA 88869 |
| 25 | NA 88870 | 'Gilt Trip' | Origanum vulgare L. subsp. vulgare | Michigan, United States | NA | | Not Available | 2024 | DEVELOPED | PRE 03/2024 | | | | | Cultivar | Full name as recorded at the U.S. National Arboretum: Origanum vulgare subsp. vulgare 'Gilt Trip' | 2190935 | NA 88870 |
| 26 | NA 85123 | 'Kaliteri' | Origanum sp. | | NA | | Not Available | 2023 | | | | | | | Cultivar | Full name as recorded at U.S. National Arboretum: Origanum 'Kaliteri'. Because this material frequently dies and is re-acquired from new sources not warranting new accession numbers, the source of this accession will vary over time. In 2018, this was acquired from Richters Herbs in Goodwood, Ontario, Canada. The name, which means "the best" in Greek, is invalid according to the Int'l Code of Nomenclature for Cultivated Plants, which prohibits epithets with such meanings. | 2154044 | NA 85123 |
| 27 | NA 85122 | NA 85122 | Origanum dictamnus L. | | NA | | Not Available | 2023 | | | | | | | Cultivated material | Full name as recorded at U.S. National Arboretum: Origanum dictamnus. Because this material frequently dies and is re-acquired from new sources not warranting new accession numbers, the source of this accession and the form under which it is received (generally plants, but sometimes possibly cuttings or seed) will vary over time. Form received: unknown propagule type. | 2154043 | NA 85122 |
| 28 | NA 87389 | 'Hilltop' | Origanum ×majoricum Cambess. | | NA | | Not Available | 2023 | | | | | | | Cultivar | Received as Origanum vulgare 'Hilltop Oregano'. | 2158320 | NA 87389 |
| 29 | NA 87390 | NA 87390 | Origanum dictamnus L. | | NA | | Not Available | 2023 | | | | | | | Cultivated material | | 2158321 | NA 87390 |
| 30 | NA 87409 | 'Sicilian' | Origanum ×majoricum Cambess. | | NA | | Not Available | 2023 | | | | | | | Cultivar | Received as Origanum sp. (Sicilian oregano). | 2158340 | NA 87409 |
| 31 | W6 475 grin | | Origanum vulgare L. | | | | Historic | 2014 | | | | | | | | An accession only used for order items that do not have accessions linked to them. | 1915565 | W6 475 grin |
| 32 | NA 78677 | 'Amethyst Falls' | Origanum sp. | | NA | | Not Available | 2009 | | | | | | | Cultivar | Full name as recorded at U.S. National Arboretum: Origanum 'Amethyst Falls'. | 2151428 | NA 78677 |
| 33 | NA 74867 | NA 74867 | Origanum vulgare L. subsp. hirtum (Link) Ietsw. | | NA | | Not Available | 2002 | | | | | | | Cultivated material | Full name as recorded at U.S. National Arboretum: Origanum vulgare subsp. hirtum. | 2150179 | NA 74867 |
| 34 | Ames 24696 | Index Seminum 693 | Origanum vulgare L. subsp. virens (Hoffmanns. & Link) Ietsw. | Coimbra, Portugal | NC7 |  | Not Available | 1998 | COLLECTED | 09/13/1997 | Povoa da Lomba. | 40.31666667, -8.58333333 | | | Wild material | | 1559009 | Ames 24696 |
| 35 | W6 20658 | W6 20658 | Origanum vulgare L. | Basilicata, Italy | | | Historic | 1998 | DONATED | 04/1998 | | | | | Cultivated material | Climate: Eu-Mediterranean. 750 m above sea level. Use: aromatic. Perennial. | 1559194 | W6 20658 |
| 36 | NA 65933 | 'Jim Best' | Origanum vulgare L. subsp. vulgare | | NA | | Not Available | 1995 | | | | | | | Cultivar | Full name as recorded at U.S. National Arboretum: Origanum vulgare subsp. vulgare 'Jim Best'. | 2147619 | NA 65933 |
| 37 | NA 46976 | NA 46976 | Origanum vulgare L. subsp. gracile (K. Koch) Ietsw. | | NA | | Not Available | 1980 | | | | | | | Cultivated material | Full name as recorded at U.S. National Arboretum: Origanum vulgare subsp. gracile. | 2145321 | NA 46976 |
| 38 | NA 46571 | 'Aureum' | Origanum vulgare L. subsp. vulgare | | NA | | Not Available | 1980 | | | | | | | Cultivar | Full name as recorded at U.S. National Arboretum: Origanum vulgare subsp. vulgare 'Aureum'. | 2145291 | NA 46571 |
| 39 | NA 46585 | NA 46585 | Origanum vulgare L. subsp. hirtum (Link) Ietsw. | | NA | | Not Available | 1980 | | | | | | | Cultivated material | Full name as recorded at U.S. National Arboretum: Origanum vulgare subsp. hirtum. Final name determination by A Tucker 11/1982 | 2145293 | NA 46585 |
| 40 | Ames 1682 | B-49941 | Origanum vulgare L. | | NC7 | | | 1975 | DONATED | 07/23/1975 | | | | | Cultivated material | | 1015470 | Ames 1682 |
| 41 | Ames 1683 | B-48842 | Origanum vulgare L. | | NC7 | | | 1975 | DONATED | 07/23/1975 | | | | | Cultivated material | | 1015472 | Ames 1683 |
| 42 | Ames 1684 | B-49943 | Origanum vulgare L. | | NC7 | | | 1975 | DONATED | 07/23/1975 | | | | | Cultivated material | | 1015482 | Ames 1684 |
| 43 | Ames 1685 | B-49944 | Origanum vulgare L. | | NC7 | | Not Available | 1975 | DONATED | 07/23/1975 | | | | | Cultivated material | | 1015483 | Ames 1685 |
| 44 | Ames 1686 | B-52275 | Origanum vulgare L. | | NC7 | | | 1975 | DONATED | 07/23/1975 | | | | | Cultivated material | | 1015495 | Ames 1686 |
| 45 | NSL 6410 | SWEET MARJORAM | Origanum majorana L. | Pennsylvania, United States | NLGRP | | Not Available | 1961 | DONATED | 1961 | | | | | | | 1036581 | NSL 6410 |