| 0 | PI 436864 | | Croton capitatus Michx. | United States | | | Historic | 1979 | COLLECTED | 11/1975 | Brazoria Co., Texas | | | | | Collected by D. Palmer. | 1331800 | PI 436864 |
| 1 | PI 436865 | | Croton capitatus Michx. | United States | | | Historic | 1979 | COLLECTED | 09/1977 | Wilson Co., Texas | | 152 | | | Collected by G. Valentine. | 1331801 | PI 436865 |
| 2 | PI 323539 | | Croton megalocarpus Hutch. | Kenya | | | Historic | 1967 | COLLECTED | | | | | | | | 1714302 | PI 323539 |
| 3 | PI 144814 | No. 39.1126 | Croton alnifolius Lam. | Lima, Peru | | | Historic | 1942 | COLLECTED | | | | | 500m to 600m altitude | | | 1876002 | PI 144814 |
| 4 | PI 144815 | No. 39.2391 | Croton sp. | Arequipa, Peru | | | Historic | 1942 | COLLECTED | | | | | Sea level | | | 1876003 | PI 144815 |
| 5 | PI 143734 | | Croton sp. | Xizang Zizhiqu, China | | | Historic | 1942 | COLLECTED | | | | | | | | 1869691 | PI 143734 |
| 6 | PI 134744 | No. 3248 | Croton sp. | Coahuila de Zaragoza, Mexico | | | Historic | 1940 | COLLECTED | 09/10/1939 | Sierra de la Madera, Canon del Agua | | | | | | 1851921 | PI 134744 |
| 7 | PI 134525 | No. 2663 | Croton fruticulosus Engelm. ex Torr. | Nuevo León, Mexico | | | Historic | 1939 | COLLECTED | 08/11/1939 | | | | | | | 1851389 | PI 134525 |
| 8 | PI 134526 | No. 3157 | Croton fruticulosus Engelm. ex Torr. | Coahuila de Zaragoza, Mexico | | | Historic | 1939 | COLLECTED | 09/06/1939 | Sierra de la Madera | | | | | | 1851390 | PI 134526 |
| 9 | PI 134527 | No. 3749 | Croton neomexicanus Müll. Arg. | Texas, United States | | | Historic | 1939 | COLLECTED | 10/19/1939 | Desert flats west of the Chison Mountains, Brewster County | | | | | | 1851392 | PI 134527 |
| 10 | PI 134528 | No. 2601 | Croton sp. | Texas, United States | | | Historic | 1939 | COLLECTED | 08/08/1939 | Melon | | | | | | 1851394 | PI 134528 |
| 11 | PI 134529 | No. 3638 | Croton sp. | Sonora, Mexico | | | Historic | 1939 | COLLECTED | 10/05/1993 | El Rio Bonito | | | | | | 1851395 | PI 134529 |
| 12 | PI 134530 | No. 3687 | Croton sp. | Sonora, Mexico | | | Historic | 1939 | COLLECTED | 10/07/1939 | El Rio Bonito | | | | | | 1851396 | PI 134530 |
| 13 | PI 110919 | No. 3223 | Croton pungens Jacq. | Colombia | | | Historic | 1935 | COLLECTED | 03/20/1935 | Between Cucuta and Pamplona | | | | | | 1802505 | PI 110919 |
| 14 | PI 110920 | No. 3190 | Croton gossypiifolius Vahl | Táchira, Venezuela | | | Historic | 1935 | COLLECTED | 03/12/1935 | Near Capacho | | | | | | 1802506 | PI 110920 |
| 15 | PI 110921 | Pringamoza | Croton dolichostachyus Pittier | Lara, Venezuela | | | Historic | 1935 | COLLECTED | 03/09/1935 | Between Barquisimento and Carora | | | | | | 1802507 | PI 110921 |
| 16 | PI 111000 | No. 3287 | Croton gossypiifolius Vahl | Cundinamarca, Colombia | | | Historic | 1935 | COLLECTED | 04/11/1935 | La Esperenza | | | | | | 1802581 | PI 111000 |
| 17 | PI 110183 | No. 3102 | Croton sp. | Carabobo, Venezuela | | | Historic | 1935 | COLLECTED | 02/23/1935 | Highway between Valencia and El Cambul | | | | | | 1801586 | PI 110183 |
| 18 | PI 109977 | Carcanapire | Croton flavens L. | Venezuela | | | Historic | 1935 | COLLECTED | 02/15/1935 | Dry hillsides near the sea on road between Caracas and Cabo Blanco | | | | | | 1801384 | PI 109977 |
| 19 | PI 105255 | | Croton tiglium L. | India | | | Historic | 1934 | COLLECTED | | | | | | | | 1492433 | PI 105255 |
| 20 | PI 104112 | | Croton urucurana Baill. | Argentina | | | Historic | 1934 | COLLECTED | | | | | | | | 1792508 | PI 104112 |
| 21 | PI 99557 | No. 3872 | Croton eluteria (L.) W. Wright | Bahamas | | | Historic | 1932 | COLLECTED | 01/05/1932 | Cat Island | | | | | | 1786867 | PI 99557 |
| 22 | PI 98369 | | Croton tiglium L. | Sichuan Sheng, China | | | Historic | 1932 | COLLECTED | | | | | | | | 1785469 | PI 98369 |
| 23 | PI 80249 | | Croton sp. | Sierra Leone | | | Historic | 1929 | COLLECTED | | | | | | | | 1496307 | PI 80249 |
| 24 | PI 69065 | | Croton eluteria (L.) W. Wright | Bahamas | | | Historic | 1926 | COLLECTED | | Nassau | | | | | | 1499605 | PI 69065 |
| 25 | PI 64101 | 'Capixingui' | Croton floribundus Spreng. | São Paulo, Brazil | | | Historic | 1925 | COLLECTED | | | | | | | | 1498161 | PI 64101 |
| 26 | PI 60453 | No. 95 | Croton megalocarpus Hutch. | Nairobi City, Kenya | | | Historic | 1924 | COLLECTED | 02/23/1924 | | | | | | | 1661933 | PI 60453 |
| 27 | PI 45196 | | Croton tiglium L. | Missouri, United States | | | Historic | 1917 | COLLECTED | | | | | | | | 1507313 | PI 45196 |
| 28 | PI 41879 | Pa tou | Croton tiglium L. | Sichuan Sheng, China | | | Historic | 1916 | COLLECTED | | | | | | | | 1606234 | PI 41879 |
| 29 | PI 37741 | | Croton angolensis Müll. Arg. | Congo | | | Historic | 1914 | COLLECTED | | | | | | | | 1516428 | PI 37741 |
| 30 | PI 8259 | | Croton setigerus Hook. | Provence-Alpes-Côte-d’Azur, France | | | Historic | 1902 | COLLECTED | | | | | | | | 1547360 | PI 8259 |
| 31 | PI 6448 | | Croton tiglium L. | Sri Lanka | | | Historic | 1901 | COLLECTED | | | | | | | | 1543749 | PI 6448 |
| 32 | WLP 3362 | TXWL2023-019 | Croton capitatus Michx. | Texas, United States | NA | | | 2023 | COLLECTED | 12/06/2023 | Private property (Bayou Bleu Farm). | 31.66208680, -94.01070880 | | One-year-old pine plantation; area treated with imazypyr and solfometuron methyl as site preparation. | Wild material | | 2165616 | WLP 3362 |
| 33 | WLP 3343 | TXWL2023-014 | Croton michauxii G. L. Webster | Texas, United States | NA | | | 2023 | COLLECTED | 11/07/2023 | Angelina National Forest: Compartment 84 Black Branch Area. | 31.03849000, -94.18679000 | | Glade area on the Catahould/Fleming formation. | Wild material | | 2159156 | WLP 3343 |
| 34 | NA 87538 | NA 87538 | Croton alabamensis E. A. Sm. ex Chapm. var. alabamensis | | NA | | Not Available | 2023 | | | | | | | Uncertain improvement status | From Doug Goldman: "This was a gift to me from the North Carolina Botanical Garden in Chapel Hill, NC. A staff member there, Matt Gocke, was propagating a number of these, started either from seed or from rooted cuttings. I do not know where the NC Botanical Garden got their material of this species, but I've keyed it out to C. alabamensis var. alabamensis, which is endemic to just a few counties in central Alabama. They may have this species cultivated in the garden there." | 2158771 | NA 87538 |
| 35 | W6 60918 | CA067-6 | Croton californicus Müll. Arg. | California, United States | W6 |  | | 2023 | | | | | | | Wild material | Right next to the Mexico border, agricultural or waste fire burns in the mornings. Plants have high viability (100%), 2.5 seeds per fruit, 150 fruits per plant, but will only have enough available seed for a standard collection. | 2142556 | W6 60918 |
| 36 | W6 60391 | CA190B-189 | Croton californicus Müll. Arg. | California, United States | W6 |  | | 2022 | | | | | | | Wild material | Sage green, paddle shaped leaves, three-lobed fruits, males have smaller flowers, prostrate | 2138329 | W6 60391 |
| 37 | W6 60449 | CA190B-188 | Croton setigerus Hook. | California, United States | W6 |  | | 2022 | | | | | | | Wild material | Flowers clustered in hirsute bristled inflorescence. | 2138387 | W6 60449 |
| 38 | W6 48715 | OR110-611 | Croton setigerus Hook. | Oregon, United States | W6 |  | | 2015 | | | | | | | Wild material | | 1922621 | W6 48715 |
| 39 | W6 45502 | OR030-320 | Croton setigerus Hook. | Oregon, United States | W6 |  | Not Available | 2013 | | | | | | | Wild material | | 1906817 | W6 45502 |
| 40 | W6 42776 | MSB181455 | Croton monanthogynus Michx. | Texas, United States | W6 |  | | 2011 | | | | | | | Wild material | | 1895420 | W6 42776 |
| 41 | WLP 1115 | MSB286637 | Croton alabamensis E. A. Sm. ex Chapm. | Texas, United States | NA |  | | 2011 | COLLECTED | 06/04/2005 | | 30.58501000, -97.99075000 | 311 | Found along banks of creek (high and low side). | Wild material | | 1895248 | WLP 1115 |
| 42 | NA 78003 | NA 78003 | Croton alabamensis E. A. Sm. ex Chapm. | Alabama, United States | NA | | Not Available | 2008 | COLLECTED | 09/17/2008 | Fullman Glade | | | a bit of a drainage swale in the open glade | | | 1950260 | NA 78003 |
| 43 | W6 33207 | NM930-27 | Croton dioicus Cav. | New Mexico, United States | W6 |  | | 2008 | | | | | | | Wild material | | 1780155 | W6 33207 |
| 44 | W6 33208 | CA190-77 | Croton setigerus Hook. | California, United States | W6 |  | | 2008 | | | | | | | Wild material | | 1780270 | W6 33208 |
| 45 | NA 56782 | NA 56782 | Croton alabamensis E. A. Sm. ex Chapm. | | NA | | Not Available | 1985 | | | | | | | | | 1952058 | NA 56782 |
| 46 | NA 28554 | NA 28554 | Croton alabamensis E. A. Sm. ex Chapm. | | NA | | Not Available | 1966 | | | | | | | Uncertain improvement status | Full name as recorded at U.S. National Arboretum: Croton alabamensis. native only to Alabama | 2144099 | NA 28554 |
| 47 | MIA 13399 | | Croton megalobotrys Müll. Arg. | | | | Historic | 1952 | DONATED | 1952 | | | | | | | 1063458 | MIA 13399 |