National Plant Germplasm System
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| National Plant Germplasm System | |
|---|---|
| |
| Type | Network of gene banks of the United States Department of Agriculture |
| Website | ars-grin.gov
|
| Base | United States |
| Scope | National network; collections from many countries |
| Focus | Conservation and supply of crop germplasm |
| Other sites | GRIN-Global · Hemp collection |
The National Plant Germplasm System (NPGS) is the network of gene banks of the United States Department of Agriculture (USDA), run by its Agricultural Research Service. In February 2026 it held more than 621,000 plant accessions of over 16,800 species at more than 20 sites.[1] Its database, GRIN-Global, keeps 873 entries for Cannabis. Of these, 696 are the hemp collection gathered since 2021 at Geneva, New York, 159 are historic entries, most of them received between 1898 and 1959, and 18 are vouchers of protected cultivars.[2]
Sites and storage
Each site keeps the collections of particular crops. The Plant Genetic Resources Unit at Geneva, on the Geneva campus of Cornell University, was formed in 1986 by merging the Northeast Regional Plant Introduction Station with the national clonal repository for apple, tart cherry and grape. It keeps about 20,000 accessions of more than 300 species, among them vegetable seed crops, apples, grapes and hemp.[3] In GRIN-Global the station's code is NE9.[4]
The National Seed Storage Laboratory at Fort Collins, Colorado, opened in 1958 to keep valuable seed available to scientists in perpetuity. Congress had funded it in 1956.[5] As the National Laboratory for Genetic Resources Preservation, it is the system's secure backup site and stores seed in freezers and in liquid nitrogen.[1] The hemp collection was planned to keep its backups there.[6]
Cannabis received before 1960
The 159 historic cannabis entries are entries for seed the system no longer holds. All but seven were received between 1898 and 1959. Most came from China (45) and Russia (29), with 13 from Japan and eight from Turkey. Twenty-three were received in 1924 alone, and the last of the early entries arrived from Murcia in Spain in 1959. The other seven, cultivars from France and three clones from the United States, were received in 2022 and 2023.[2]
PI 948 and PI 957, the earliest, are seed from Nerchinsk in Siberia collected by Niels Ebbesen Hansen of the South Dakota Agricultural Experiment Station and received on 24 May 1898. Each carries the notice that the accession "no longer exists and can not be requested".[7][8] PI 5021, seed from Shanghai received on 28 March 1900, carries the same notice.[9]
The hemp collection at Geneva
The hemp collection at Geneva dates from 2021. Federal law had ceased to treat hemp as a controlled substance with the 2018 Farm Bill.[10] On 6 November 2026 the collection held 696 accessions, all numbered in the G series. Forty-five had been received in 2021, 227 in 2022, 265 in 2023, 75 in 2024, 28 in 2025 and 56 in 2026 to that date. Of the 696, 347 were collected, 170 developed and 96 donated. By improvement status, 215 are landraces, 133 wild material, 109 cultivars and 182 of uncertain status, with smaller numbers of breeding material, clones and cultivated material.[2]
The accessions came from 43 countries. The United States gave 295, of which 126 are wild material. Pakistan gave 43, Afghanistan 36, India 24, China 23, Laos 22, Nepal 20 and Germany 18. No country of origin is given for 113.[2] Angus Pretty, founder of the seed vendor The Real Seed Company, gave 190 accessions.[11] Ademola Aina and colleagues gathered seed and tissue from 1,821 plants in 91 feral populations in the United States for the collection.[12]
Eighteen further cannabis entries are vouchers in the system's Plant Variety Protection collection, among them the cultivar NWG 23, received in 2026.[2][13]
Keeping and regrowing the seed
At Geneva, hemp seed is dried at 4 °C for six weeks, packed in envelopes and stored in a cold room at −20 °C. The collection screens its accessions against the 0.3 per cent limit on THC in the federal definition of hemp.[14] An amendment in force from 12 November 2026 counts total THC, including its acid form, and leaves out of hemp any viable seed of a plant above 0.3 per cent of that total.[15]
An accession is regrown when it falls below 2,000 seeds or 70 per cent viability.[6] Regrowing takes four to five months indoors, because hemp is wind-pollinated and cannot be regrown outdoors like an insect-pollinated crop. The curator, Zachary Stansell, said in 2024 that the unit was adding growth chambers and beginning to build "hemp huts", outdoor structures that keep out pollen.[14] Hundreds of wild lots arrived as small samples of varying quality, for which "seed increases must be done to produce seeds available for distribution".[16] How long cannabis seed keeps in store is treated under ex situ conservation.
Terms of supply
The system supplies germplasm to scientists, educators, producers and other research and education bodies. It does not supply it for individual, home or community gardening, which it regards as conflicting with the government's policy of not competing with commercial enterprises. Accessions marked "not available" because their seed is scarce or of low viability are generally not distributed.[17] On 6 November 2026, 91 of the 696 hemp accessions could be requested.[2] Requests go through GRIN-Global, and Geneva typically sends 25 seeds of an accession.[18] The Cornell factsheet of 2024 says seed can be mailed anywhere in the world for research, free of charge.[14]
For a request from outside the United States, the requester must obtain any import permit and other documents that their own country requires. The system does not send germplasm abroad when it cannot meet the recipient country's import or quarantine requirements, unless the requester holds a waiver.[17] Since 1 January 2025, a requester outside the United States must accept the Standard Material Transfer Agreement for propagative material, seed included. The rule applies to all taxa the system distributes.[19] Within the United States, the hemp accession G 33751, from Nepal, is marked "Interstate Shipment Prohibited by Federal Seed Act", and several states list it as a noxious weed.[4]
Accessions
Accessions whose seed is held by the National Plant Germplasm System.
| Name | Country | Collected | |
|---|---|---|---|
| NPG-AFG-BAL-0020230001 | Balkh 'Green / Purple' General Population | Afghanistan | |
| NPG-AFG-BAL-0020240001 | Chimtal-Balkh General Population | Afghanistan | |
| NPG-AFG-BAL-1120180001 | Balkh 'Long slim bud' General Population 2018 | Afghanistan | |
| NPG-AFG-BAL-1120180002 | Balkh 'Round bud' General Population 2018 | Afghanistan | |
| NPG-AFG-BAL-1120180003 | Mazar 'Mixed plants' General Population 2018 | Afghanistan | |
| NPG-AFG-BAL-1120180004 | Sholgara 'Dry buds' General Population 2018 | Afghanistan | |
| NPG-AFG-BAL-1220180001 | Balkh 'Purple bud' General Population 2018 | Afghanistan | |
| NPG-AFG-BAL-1220180002 | Balkh 'Green bud' General Population 2018 | Afghanistan | |
| NPG-AFG-GHA-0020200001 | Ghazni General Population 2020 | Afghanistan | |
| NPG-AFG-KAN-0020240001 | Qandahar General Population | Afghanistan | |
| NPG-AFG-NAN-0020240001 | Nangar General Population | Afghanistan | |
| NPG-AFG-NAN-0020240002 | Nangarhar General Population | Afghanistan | |
| NPG-AFG-UNK-0020190001 | Afghan Mix General Population 2019 | Afghanistan | |
| NPG-AFG-UNK-0020230001 | NPG Buzzard's Hawaiian Hashbud IBL | Afghanistan | |
| NPG-AFG-UNK-0020230002 | NPG Deep Chunk IBL | Afghanistan | |
| NPG-AFG-UNK-0020240001 | Dayma-Tashqurghan General Population | Afghanistan | |
| NPG-AFG-UNK-0020240002 | Sholgar General Population | Afghanistan | |
| NPG-CHL-UNK-0019080001 | Limávida General Population 1908 | Chile | |
| NPG-CHL-UNK-0019280001 | Valdivia General Population 1928 | Chile | |
| NPG-CHL-UNK-0019280002 | Lanco General Population 1928 | Chile | |
| NPG-CHN-ANH-0019110001 | Hwai Yuan General Population 1911 | China | |
| NPG-CHN-BEI-1119240001 | Huangan General Population 1924 | China | |
| NPG-CHN-BEI-1119240002 | Hsiamaling General Population 1924 | China | |
| NPG-CHN-BEI-1119240003 | Peking Market General Population 1924 | China | |
| NPG-CHN-HEB-0219250001 | Huailai General Population 1925 | China | |
| NPG-CHN-HEB-0319250001 | Paotingfu General Population 1925 | China | |
| NPG-CHN-HEB-1119160001 | Malanyu General Population 1916 | China | |
| NPG-CHN-HLJ-0019220001 | Anda General Population 1922 | China | |
| NPG-CHN-HLJ-0519250001 | Harbin Market General Population 1925 | China | |
| NPG-CHN-HLJ-1119250001 | Harbin Experiment Station General Population 1925 | China | |
| NPG-CHN-HLJ-1219060001 | Harbin Market General Population 1906 | China | |
| NPG-CHN-HUB-0019120001 | Hankow General Population 1912 | China | |
| NPG-CHN-HUB-0019130001 | Hankow General Population 1913 | China | |
| NPG-CHN-HUB-1219070001 | Ichang General Population 1907 | China | |
| NPG-CHN-LIA-0019060001 | Hai-cheng District General Population 1906 | China | |
| NPG-CHN-LIA-0019060002 | Shinmintong General Population 1906 | China | |
| NPG-CHN-LIA-0019100001 | Mukden General Population 1910 | China | |
| NPG-CHN-LIA-0519060001 | Hai-tcheng General Population 1906 | China | |
| NPG-CHN-LIA-0619060001 | Yentai General Population 1906 | China | |
| NPG-CHN-LIA-0619060002 | Liaoyang General Population 1906 | China | |
| NPG-CHN-NMG-0019350001 | Suiyuan General Population 1935 | China | |
| NPG-CHN-SHD-0019170001 | Yihsien General Population 1917 | China | |
| NPG-CHN-SHD-0419130001 | Tsinan General Population 1913 | China | |
| NPG-CHN-SHG-0019000001 | Shanghai General Population 1900 | China | |
| NPG-CHN-SHG-0019060001 | Shanghai General Population 1906 | China | |
| NPG-CHN-SHG-0019100001 | Shanghai General Population 1910 | China | |
| NPG-CHN-SHX-0319080001 | Tongchor General Population 1908 | China | |
| NPG-CHN-SHX-0319080002 | Soolungko General Population 1908 | China | |
| NPG-CHN-SHX-0519250001 | Liaochou General Population 1925 | China | |
| NPG-CHN-SHX-0719140001 | Luanfu General Population 1914 | China | |
| NPG-CHN-SIC-0019110001 | Chengtu Plain General Population 1911 | China | |
| NPG-CHN-SIC-0019110002 | Kwanhsien General Population 1911 | China | |
| NPG-CHN-SIC-0019210001 | Chengtu General Population 1921 | China | |
| NPG-CHN-SNX-0019040001 | Hsi-an General Population 1904 | China | |
| NPG-CHN-SNX-0119140001 | Sianfu General Population 1914 | China | |
| NPG-CHN-UNK-0019170001 | Manchuria General Population 1917 | China | |
| NPG-CHN-UNK-0020260001 | Chinese Hemp General Population | China | |
| NPG-CHN-UNK-0119070001 | Wu-lu-kai General Population 1907 | China | |
| NPG-CHN-UNK-1019240001 | Fa Hua Ssu General Population 1924 | China | |
| NPG-CHN-UNK-1019250001 | Echo General Population 1925 | China | |
| NPG-CHN-UNK-1219060001 | Wu-li-pu General Population 1906 | China | |
| NPG-CHN-XIN-0019050001 | Bang General Population 1905 | China | |
| NPG-CHN-XIN-0019140001 | Kashgar General Population 1914 | China | |
| NPG-CHN-XIN-1219100001 | Khanaka General Population 1910 | China | |
| NPG-CHN-ZHE-0019090001 | Hangchow General Population 1909 | China | |
| NPG-CHN-ZHE-0019100001 | Hangchow General Population 1910 | China | |
| NPG-CHN-ZHE-0019110001 | Mokanshan General Population 1911 | China | |
| NPG-IND-MAN-0020260001 | Ukrhul General Population | India | |
| NPG-IND-ODI-0020240001 | Odisha #1 General Population | India | |
| NPG-IND-ODI-0020240002 | Odisha #2 General Population | India | |
| NPG-IND-PUN-0020240001 | Amritsar General Population | India | |
| NPG-IND-UNK-0020230001 | Ukhrul General Population | India | |
| NPG-IND-UNK-0020240001 | Anandpur General Population | India | |
| NPG-IND-UNK-0020240002 | Hoshiarpur General Population | India | |
| NPG-IND-UTT-0020170001 | Johaar General Population 2017 | India | |
| NPG-IND-UTT-0020210001 | Nanda Devi #2 General Population | India | |
| NPG-IND-UTT-0020230001 | Kumaoni General Population | India | |
| NPG-IND-WEB-0019010001 | Calcutta General Population 1901 | India | |
| NPG-IND-WEB-0019010002 | Sibpur Botanic Garden General Population 1901 | India | |
| NPG-IND-WEB-0020240001 | Bengali General Population | India | |
| NPG-IND-WEB-0020240002 | Bengal-Mayapur General Population | India | |
| NPG-IND-WEB-0020260001 | Cooch Behar General Population | India | |
| NPG-IND-WEB-0020260002 | Durgapur General Population | India | |
| NPG-IND-WEB-0020260003 | Jalpaiguri General Population | India | |
| NPG-IND-WEB-0020260004 | Siliguri General Population | India | |
| NPG-IRN-RKH-0020240001 | Khorasan General Population | Iran | |
| NPG-IRN-SIS-0020240001 | Khorasan #2 General Population | Iran | |
| NPG-IRN-UNK-0020240001 | Khorasan #3 General Population | Iran | |
| NPG-IRN-UNK-0020260001 | Persian Food Store Seeds General Population | Iran | |
| NPG-JPN-GUN-0019100001 | Gunma General Population 1910 | Japan | |
| NPG-JPN-MIY-0019300001 | Miyazaki Selection 1930 | Japan | |
| NPG-JPN-TOC-0019150001 | Tochigi General Population 1915 | Japan | |
| NPG-JPN-TOC-0019160001 | Tochigi Hemp General Population 1916 | Japan | |
| NPG-JPN-UNK-0019010001 | Yokohama General Population 1901 | Japan | |
| NPG-JPN-UNK-0019010002 | Shimonita General Population 1901 | Japan | |
| NPG-JPN-UNK-0019010003 | Hiroshima General Population 1901 | Japan | |
| NPG-JPN-UNK-0019010004 | Tochigi General Population 1901 | Japan | |
| NPG-JPN-UNK-0019010005 | Aidzu General Population 1901 | Japan | |
| NPG-JPN-UNK-0019010006 | Iwate General Population 1901 | Japan | |
| NPG-JPN-UNK-0019030001 | Aizu General Population 1903 | Japan | |
| NPG-KOR-GYE-0319300001 | Ouami (Keikido) General Population 1930 | Korea | |
| NPG-KOR-SEO-0019140001 | Keijo Model Station General Population 1914 | Korea | |
| NPG-KOR-SEO-0019170001 | Keijo Model Farm General Population 1917 | Korea | |
| NPG-KOR-SEO-0019170002 | Seoul General Population 1917 | Korea | |
| NPG-KOR-UNK-0019160001 | Kangwon General Population 1916 | Korea | |
| NPG-LAO-BOL-0020200001 | Highland Lao #3 General Population 2020 | Laos | |
| NPG-LAO-BOL-0020210001 | Highland Lao #2 General Population 2021 | Laos | |
| NPG-LAO-BOL-0020240001 | Namkading General Population | Laos | |
| NPG-LAO-BOL-0020260001 | Hmong D-Type General Population | Laos | |
| NPG-LAO-LNA-0020220001 | Burmese General Population 2022 | Laos | |
| NPG-LAO-UNK-0020230001 | Lao Gold General Population | Laos | |
| NPG-LAO-UNK-0020230002 | Lao Sa General Population | Laos | |
| NPG-LAO-UNK-0020230003 | Lao Village General Population | Laos | |
| NPG-MWI-UNK-0020240001 | Malawi 2020 General Population | Malawi | |
| NPG-NPL-BAG-0020230001 | Kathmandu Valley General Population | Nepal | |
| NPG-NPL-GAN-0020230001 | Lamjung General Population | Nepal | |
| NPG-NPL-GAN-0020230002 | Nepal General Population | Nepal | |
| NPG-NPL-GAN-0020260001 | Gorkha Jungli General Population | Nepal | |
| NPG-NPL-GAN-0020260002 | Nepali Highland #1 General Population | Nepal | |
| NPG-NPL-GAN-0020260003 | Nepali Highland #2 General Population | Nepal | |
| NPG-NPL-GAN-0020260004 | Nepali Highland #3 General Population | Nepal | |
| NPG-NPL-GAN-0020260005 | Nepali Highland #4 General Population | Nepal | |
| NPG-NPL-KAR-0020210001 | Jumla General Population 2021 | Nepal | |
| NPG-NPL-KAR-0020210002 | Jumla Jungli General Population 2021 | Nepal | |
| NPG-NPL-KAR-1120210001 | Dolpa General Population 2021 | Nepal | |
| NPG-NPL-UNK-0020230001 | Nepali (Baglung) General Population | Nepal | |
| NPG-NPL-UNK-0020230002 | Nepali Multipurpose General Population | Nepal | |
| NPG-NPL-UNK-0020230003 | Pokhara General Population | Nepal | |
| NPG-NPL-UNK-0020260001 | Nepalese General Population | Nepal | |
| NPG-NPL-UNK-0020260002 | Nepali Mountain Ganja General Population | Nepal | |
| NPG-PAK-GIL-0020260001 | Raat Hunza Valley Selection | Pakistan | |
| NPG-PAK-KHY-0020190001 | Chitrali #2 General Population 2019 | Pakistan | |
| NPG-PAK-KHY-0020190002 | Chitral (Passom) General Population 2019 | Pakistan | |
| NPG-PAK-KHY-0020190003 | Chitral (Brep) General Population 2019 | Pakistan | |
| NPG-PAK-KHY-0020220001 | Chitrali General Population 2022 | Pakistan | |
| NPG-PAK-KHY-0020230001 | Balakot General Population | Pakistan | |
| NPG-PAK-KHY-0020240001 | Tirah (T.V.) Selection | Pakistan | |
| NPG-PAK-KHY-0020260001 | Dir General Population | Pakistan | |
| NPG-PAK-KHY-0020260002 | Kunar (Dir) General Population | Pakistan | |
| NPG-PAK-KHY-0020260003 | Mansehra General Population | Pakistan | |
| NPG-PAK-KHY-0020260004 | Peshawar (Village) General Population | Pakistan | |
| NPG-PAK-KHY-0020260005 | Timegara General Population | Pakistan | |
| NPG-PAK-KHY-0520190001 | Afghan #1 General Population 2019 | Pakistan | |
| NPG-PAK-KHY-0520190002 | Afghan #2 General Population 2019 | Pakistan | |
| NPG-PAK-UNK-0020230001 | Kaghan Valley General Population | Pakistan | |
| NPG-PAK-UNK-0020230002 | Murree General Population | Pakistan | |
| NPG-PAK-UNK-0020230003 | Naqut General Population | Pakistan | |
| NPG-PAK-UNK-0020230004 | Shugran General Population | Pakistan | |
| NPG-PAK-UNK-0020230005 | Timigura General Population | Pakistan | |
| NPG-PAK-UNK-0020230006 | NPG X18 (Cider Kush) IBL | Pakistan | |
| NPG-PAK-UNK-0020230007 | Yaseen General Population | Pakistan | |
| NPG-PAK-UNK-0020240001 | Kash General Population | Pakistan | |
| NPG-PAK-UNK-0020240002 | Tirah (6F) Selection | Pakistan | |
| NPG-PAK-UNK-0020240003 | Tirah (7A) Selection | Pakistan | |
| NPG-PAK-UNK-0020240004 | Tirah (7E) Selection | Pakistan | |
| NPG-PAK-UNK-0020240005 | Tirah (7F) Selection | Pakistan | |
| NPG-PAK-UNK-0020240006 | Tirah (7H) Selection | Pakistan | |
| NPG-PAK-UNK-0020240007 | Tirah (N) Selection | Pakistan | |
| NPG-PAK-UNK-0020260001 | Pakistani General Population | Pakistan | |
| NPG-PAK-UNK-0020260002 | Shugran (Wild) General Population | Pakistan | |
| NPG-PAK-UNK-0020260003 | Tribal Areas General Population | Pakistan | |
| NPG-SYR-UNK-0019150001 | Damascus General Population 1915 | Syria | |
| NPG-THA-SAK-0020260001 | Sakon Nakhon General Population | Thailand | |
| NPG-TUR-ANK-0419360001 | Ankara Bazaar General Population 1936 | Turkey | |
| NPG-TUR-IST-0018990001 | Constantinople General Population 1899 | Turkey | |
| NPG-TUR-KAH-0719360001 | Kahramanmaraş Bazaar General Population 1936 | Turkey | |
| NPG-TUR-KAS-1019340001 | Kastamonu Bazaar General Population 1934 | Turkey | |
| NPG-TUR-KAS-1019340002 | Kastamonu Agricultural Museum General Population 1934 | Turkey | |
| NPG-TUR-KAS-1019360001 | Kastamonu Bazaar General Population 1936 | Turkey | |
| NPG-TUR-SAK-1019360001 | Adapazarı Bazaar General Population 1936 | Turkey | |
| NPG-TUR-SIV-0819360001 | Sivas Bazaar General Population 1936 | Turkey | |
| NPG-TUR-UNK-0020260001 | Turkish Food Store Seeds General Population | Turkey | |
| NPG-UZB-TAS-0020260001 | NPG Tashkent IBL | Uzbekistan | |
| NPG-UZB-UNK-0020260001 | NPG Uzbek IBL | Uzbekistan |
Same lots held by a seller
Accessions held by a seed seller whose same lot also has an accession in the National Plant Germplasm System.
See also
References
- ↑ 1.0 1.1 "Plant Science at the National Laboratory for Genetic Resources Preservation". Agricultural Genetic Resources Preservation Research, Fort Collins, CO. USDA Agricultural Research Service. 18 February 2026. Retrieved 9 November 2026.
- ↑ 2.0 2.1 2.2 2.3 2.4 2.5 "Accession search, taxon Cannabis, all statuses". GRIN-Global. USDA Agricultural Research Service, National Plant Germplasm System. Retrieved 6 November 2026.
- ↑ "About PGRU". Plant Genetic Resources Unit (PGRU), Geneva, NY. USDA Agricultural Research Service. 28 August 2025. Retrieved 9 November 2026.
- ↑ 4.0 4.1 "G 33751, Cannabis sativa L., Nepali Multipurpose". GRIN-Global. USDA Agricultural Research Service, National Plant Germplasm System. Retrieved 9 November 2026.
- ↑ Curry, Helen Anne (2022). "The history of seed banking and the hazards of backup". Social Studies of Science. 52 (5): 664–688. doi:10.1177/03063127221106728. PMC 9483196.
- ↑ 6.0 6.1 "Conservation and Utilization of Hemp Genetic Resources and Associated Information". Research Project. USDA Agricultural Research Service. Project 8060-21000-030-000-D. Retrieved 5 November 2026.
- ↑ "PI 948, Cannabis sativa L., NEH1897". GRIN-Global. USDA Agricultural Research Service, National Plant Germplasm System. Retrieved 9 November 2026.
- ↑ "PI 957, Cannabis sativa L., NEH1897". GRIN-Global. USDA Agricultural Research Service, National Plant Germplasm System. Retrieved 9 November 2026.
- ↑ "PI 5021, Cannabis sativa L." GRIN-Global. United States Department of Agriculture, Agricultural Research Service. Retrieved 27 October 2026.
- ↑ Stansell, Zachary; Gordon, Tyler. "Hemp Collection". Plant Genetic Resources Unit, Geneva, New York. USDA Agricultural Research Service. Retrieved 14 October 2026.
- ↑ "Cooperator: Angus Pretty". GRIN-Global. USDA Agricultural Research Service, National Plant Germplasm System. Retrieved 28 October 2026.
- ↑ Aina, Ademola; Wenger, Jonathan P.; Stanton, Eliot; Majumdar, Chandrani Gon; ElSohly, Mahmoud; Weiblen, George D.; Ellison, Shelby (1 July 2025). "Genetic diversity, population structure, and cannabinoid variation in feral Cannabis sativa germplasm from the United States". Scientific Reports. 15 (1) 20423. doi:10.1038/s41598-025-07912-8. PMC 12215616.
- ↑ "PI 710350, Cannabis sativa L., NWG 23". GRIN-Global. USDA Agricultural Research Service, National Plant Germplasm System. Retrieved 6 November 2026.
- ↑ 14.0 14.1 14.2 Schwartz, Jocelyn; Smart, Christine D.; Stansell, Zachary (January 2024). "The USDA-ARS Hemp Germplasm Repository". Cornell Hemp. Cornell University. Retrieved 5 November 2026.
- ↑ "7 U.S. Code § 1639o: Definitions". Legal Information Institute. Cornell Law School. Retrieved 5 November 2026.
- ↑ "G 33949, Cannabis sativa L., UC Feral Synth One". GRIN-Global. USDA Agricultural Research Service, National Plant Germplasm System. Retrieved 6 November 2026.
- ↑ 17.0 17.1 "U.S. National Plant Germplasm System Distribution Policy". GRIN-Global. USDA Agricultural Research Service, National Plant Germplasm System. 24 February 2025. Retrieved 9 November 2026.
- ↑ "Germplasm Requests". Plant Genetic Resources Unit (PGRU), Geneva, NY. USDA Agricultural Research Service. 28 July 2021. Retrieved 9 November 2026.
- ↑ "SMTA Read Me" (PDF). GRIN-Global. USDA Agricultural Research Service, National Plant Germplasm System. 30 December 2024. Retrieved 9 November 2026.