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June 1, 2026 – New Shipping Procedures

Effective June 1, 2026, all U.S. National Plant Germplasm System (NPGS) recipients are required to pay the shipping charges of their germplasm requests by providing a prepaid label or waybill. For more details, please refer to our Frequently Asked Questions.

News

Effective Jan. 1, 2025, the U.S. National Plant Germplasm System will modify its SMTA acceptance policy to distinguish between propagative and non-propagative germplasm. [Read More]

The U.S. Department of Agriculture (USDA) released today the National Strategic Germplasm and Cultivar Collection Assessment and Utilization Plan in support of the Agricultural Research Service (ARS) U.S. National Plant Germplasm System’s (NPGS) mission [Read More]

International distributions are covered by the International Treaty on Plant Genetic Resources for Food and Agriculture and could be covered by the Standard Material Transfer Agreement (SMTA). [Read More]

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PI 651794
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	ACCESSION	PLANT NAME	TAXONOMY	ORIGIN	GENEBANK	AVAILABILITY	RECEIVED	IMPROVEMENT LEVEL	NARRATIVE
0	OPGC 8470	NV052-942	Petalonyx nitidus S. Watson	Nevada, United States	OPGC		2021	Wild material		2132458	OPGC 8470
1	OPGC 8107	NV052-785	Petalonyx thurberi A. Gray subsp. thurberi	Nevada, United States	OPGC	Not Available	2020	Wild material	strong scent, white flowers with long stamens (5-10mm), leaves and stems rough like sandpaper	2109988	OPGC 8107
2	OPGC 6675	NV052-712	Petalonyx nitidus S. Watson	Nevada, United States	OPGC	Not Available	2018	Wild material	Petalonyx nitidus	1966238	OPGC 6675
3	OPGC 6207	CA930A-408	Petalonyx thurberi A. Gray subsp. thurberi	California, United States	OPGC		2015	Wild material		1930500	OPGC 6207
4	OPGC 6182	NV052-538	Petalonyx thurberi A. Gray	Nevada, United States	OPGC		2015	Wild material		1926807	OPGC 6182
5	OPGC 5533	201612	Petalonyx thurberi A. Gray subsp. thurberi	Nevada, United States	OPGC	Not Available	2005	Wild material	Shrub 0.3-1 meters tall.	1674254	OPGC 5533

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June 1, 2026 – New Shipping Procedures

News

SMTA Acceptance Policy

USDA Introduces a Multi-Year Plan to Strengthen U.S. Genebank Management of Plant GermplasmInternational Distributions

International Distributions

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