| 0 | PI 691664 | BC 1 | Silphium terebinthinaceum Jacq. | Ohio, United States | W6 | | | 2004 | COLLECTED | 09/30/2004 | Bigalow Cemetery State Nature Preserve, Madison County. State route 161 West from Columbus, South on Rosedale Road | 40.10972222, -83.41916667 | | Drainage(1-well, 4-poor): 3 Full sun. Slope: None. Small prairie remnant in pioneer cemetery, total land area approx 100 m . Surrounded by farm fields, road. | Wild material | 5-7', very large cordate leaves at plant base. Yellow rays 2-3 cm. (2n=14) Sample size: 50. Population size: 200. Site size: 10 square meters. | 1690533 | PI 691664 |
| 1 | PI 628632 | NF-1 | Silphium laciniatum L. | Oklahoma, United States | W6 | | | 2001 | DEVELOPED | PRE 12/27/2001 | | | | | Breeding material | The original accessions comprising NF-1 were evaluated in 2000 and 2001 at Ardmore, OK (34 ll N, 97 05 W) for height, defined as the length of the tallest flowering stalk, and first bloom date. Chromosome number 2n=2X=14; one hundred achene (seed bearing structure) weight averages 3.25 g. | 1631354 | PI 628632 |
| 2 | PI 628633 | NF-1 Profuse Ligule | Silphium laciniatum L. | Oklahoma, United States | NLGRP | | Not Available | 2001 | DEVELOPED | | | | | | Breeding material | The parent plant (R6P1) produces a profuse amount of ligules, whereby petals, in addition to being produced by ray flowers on the periphery of the blossom, are also present on a substantial portion of disk flowers in the interior of blossom. This results in a far greater number of petals per blossom than is commonly found in compass plant, with mature achene production from both ray and disk flowers. All blossoms on R6P1 expressed the profuse ligule trait; both staminate and pistilate disk flowers were present. Anthers from staminate disk flowers of R6P1 were less well developed than those of other compass plant genotypes. First bloom date and plant height of R6P1 average approx. late June at Ardmore, OK and 17 cm, respectively. Inheritence of the profuse ligule trait is unknown. Progeny of R6P1 have not been evaluated for this trait. Chromosome number is 2n=2X=14; one hundred achene weight averages 2.54 g. | 1631362 | PI 628633 |
| 3 | PI 441268 | | Silphium laciniatum L. | Oklahoma, United States | | | Historic | 1980 | COLLECTED | 08/1976 | McCurtain Co., Oklahoma | | 155 | | Wild material | Collected by B. Barter. | 1336204 | PI 441268 |
| 4 | PI 441269 | | Silphium laciniatum L. | Oklahoma, United States | W6 | | Not Available | 1980 | COLLECTED | 09/1976 | Pittsburg Co., Oklahoma | | 242 | | Wild material | Collected by K. Taylor. | 1336205 | PI 441269 |
| 5 | PI 435785 | OCC-300 | Silphium sp. | Texas, United States | | | Historic | 1978 | COLLECTED | 1971 | Anahuac, Texas | | | | Wild material | | 1330721 | PI 435785 |
| 6 | PI 440656 | D-1962 | Silphium perfoliatum L. | Kazakhstan | W6 | | | 1978 | DEVELOPED | PRE 02/01/1978 | | | | | Cultivar | Originally from the U.S. Plant sunflower-like, to 3m. Flowers yellow. Used for silage on an experimental basis. | 1335592 | PI 440656 |
| 7 | PI 400232 | | Silphium perfoliatum L. | Former, Soviet Union | W6 | | | 1975 | COLLECTED | | | | | | Uncertain improvement status | | 1301372 | PI 400232 |
| 8 | PI 188464 | No. 36 | Silphium integrifolium Michx. | Kansas, United States | | | Historic | 1950 | COLLECTED | 09/1949 | | | | | | | 1668416 | PI 188464 |
| 9 | PI 188465 | No. 57a | Silphium integrifolium Michx. | Kansas, United States | | | Historic | 1950 | COLLECTED | 09/1949 | | | | | | | 1668417 | PI 188465 |
| 10 | PI 188466 | No. 453 | Silphium laciniatum L. | Kansas, United States | | | Historic | 1950 | COLLECTED | 09/1949 | | | | | | | 1666212 | PI 188466 |
| 11 | PI 188467 | No. 1018 | Silphium laciniatum L. | Kansas, United States | | | Historic | 1950 | COLLECTED | 09/1949 | | | | | | | 1666211 | PI 188467 |
| 12 | PI 4777 | | Silphium trifoliatum L. | United States | | | Historic | 1900 | COLLECTED | | | | | | | | 1540195 | PI 4777 |
| 13 | W6 62197 | FWS0400-17 | Silphium laciniatum L. | Alabama, United States | W6 | | Not Available | 2024 | | | | | | | | Black Boxed 2024 Seeds of Success- Incorporated into the collection 4/1/2025 | 2169528 | W6 62197 |
| 14 | W6 56669 | CBG-9129 | Silphium terebinthinaceum Jacq. | Wisconsin, United States | W6 |  | Not Available | 2019 | | | | | | | Wild material | | 2092768 | W6 56669 |
| 15 | W6 51681 | CBG-6233 | Silphium laciniatum L. | Kansas, United States | W6 | | Not Available | 2016 | | | | | | | Wild material | | 1942811 | W6 51681 |
| 16 | W6 49630 | CBG-2646 | Silphium laciniatum L. | Nebraska, United States | W6 |  | Not Available | 2015 | | | | | | | Wild material | | 1926095 | W6 49630 |
| 17 | W6 49660 | CBG-2691 | Silphium integrifolium Michx. | Illinois, United States | W6 |  | Not Available | 2015 | | | | | | | Wild material | | 1926121 | W6 49660 |
| 18 | W6 46124 | CBG-1914 | Silphium integrifolium Michx. | Kansas, United States | W6 |  | Not Available | 2013 | | | | | | | Wild material | | 1908955 | W6 46124 |
| 19 | W6 46125 | CBG-1796 | Silphium laciniatum L. | Missouri, United States | W6 |  | Not Available | 2013 | | | | | | | Wild material | | 1908956 | W6 46125 |
| 20 | W6 46126 | CBG-1826 | Silphium perfoliatum L. | Wisconsin, United States | W6 |  | Not Available | 2013 | | | | | | | Wild material | | 1908957 | W6 46126 |
| 21 | W6 44885 | LBJWC-TS-3 | Silphium radula Nutt. | Texas, United States | W6 |  | Not Available | 2012 | DONATED | 2012 | | | | | Wild material | | 1902532 | W6 44885 |
| 22 | W6 42912 | LBJWC-MLE-9 | Silphium albiflorum A. Gray | Texas, United States | W6 | | Not Available | 2011 | | | | | | | Wild material | | 1907518 | W6 42912 |
| 23 | OPGC 3151 | OPGC 3151 | Silphium albiflorum A. Gray | New York, United States | OPGC | | Not Available | 2010 | DONATED | 10/07/2010 | | | | | | for research comparison, not available for distribution. | 1896817 | OPGC 3151 |
| 24 | NA 78919 | NA 78919 | Silphium sp. | Kentucky, United States | NA | | Not Available | 2009 | COLLECTED | 10/20/2009 | Daniel Boone National Forest | 32.12008000, -83.44001000 | 372 | Roadside, edge of open, thin woods. | | | 1951092 | NA 78919 |
| 25 | NA 78008 | NA 78008 | Silphium compositum Michx. | Alabama, United States | NA | | Not Available | 2008 | COLLECTED | 09/17/2008 | Fullman Glade | | | closed canopy area, uphill from open glade | | | 1952534 | NA 78008 |
| 26 | NA 77936 | NA 77936 | Silphium integrifolium Michx. | | NA | | Not Available | 2007 | | | | | | | Cultivated material | Full name as recorded at U.S. National Arboretum: Silphium integrifolium. | 2151163 | NA 77936 |
| 27 | NA 77937 | NA 77937 | Silphium terebinthinaceum Jacq. | | NA | | Not Available | 2007 | | | | | | | Cultivated material | Full name as recorded at U.S. National Arboretum: Silphium terebinthinaceum. | 2151164 | NA 77937 |
| 28 | W6 27846 | GC 7 | Silphium terebinthinaceum Jacq. | Ohio, United States | W6 | | Not Available | 2005 | COLLECTED | 09/21/2005 | Green Camp Railroad Prairie, managed by the Marion County Historical Society, Marion County, | 40.54833333, -83.19138889 | 284 | | Wild material | | 1691055 | W6 27846 |
| 29 | W6 27847 | GC 8 | Silphium trifoliatum L. | Ohio, United States | W6 | | Not Available | 2005 | COLLECTED | 09/21/2005 | Green Camp Railroad Prairie, managed by the Marion County Historical Society, Marion County, | 40.54833333, -83.19138889 | 284 | | Wild material | | 1691056 | W6 27847 |
| 30 | W6 27584 | W6 27584 | Silphium laciniatum L. | Oklahoma, United States | W6 | | Not Available | 2005 | DONATED | 05/18/2005 | | | | | Breeding material | Obtained 4 plants copied from the original seed parent of the compass plant accession PI 628633. This plant expresses the profuse ligule trait. | 1676410 | W6 27584 |
| 31 | OPGC 2244 | 20030276 | Silphium compositum Michx. | Georgia, United States | OPGC | | Not Available | 2005 | COLLECTED | 10/31/2003 | East side of Georgia Route 49, 0.43 miles north of Camp Creek. At the entrance to a kaolin mine approximately 3.1 miles north of Andersonville National Historic Site. Macon County. | 32.23027778, -84.09777778 | 136 | Full sun to part shade on a disturbed roadside site that is occasionally mown, consisting primarily of herbaceous species with occasional forbs in the ditches. Roadside vegetation, edge of pine forests. Slope: <5%. | Wild material | Multi-stemmed deciduous herbaceous plant with upright stems and broad terminal inflorescences. 2 m tall. | 1690874 | OPGC 2244 |
| 32 | OPGC 2261 | 20040260 | Silphium terebinthinaceum Jacq. | North Carolina, United States | OPGC | | Not Available | 2005 | COLLECTED | 10/16/2004 | Picture Creek Diabase Barren. 3 towers south of all-terrain vehicle trail. Accessed from North Carolina State Road 1215 at exit 191 off of Interstate 85. Along railroad tracks about 0.2 miles south from Otha Mangum Road. | 36.16444444, -78.73833333 | 102 | Full sun, exposed conditions under powerlines in an area frequently maintained to suppress woody vegetation. Diabase Barrens. Slope: 3%. | Wild material | Deciduous herbaceous perennial with leafless branched flowering stem to 2 m tall with upright fruiting clusters. Persistent basal rosette of ovate rounded leaves with lobed base. Leaves 30 cm long and 25 cm wide. Petiole to 15 cm long. | 1690889 | OPGC 2261 |
| 33 | W6 27818 | HP-8 | Silphium trifoliatum L. | Ohio, United States | W6 | | Not Available | 2004 | COLLECTED | 11/10/2004 | Hunter Prairie, intersection of Ohio Routes 92 and 148, Belmont County | 39.92444444, -81.06250000 | | | Wild material | | 1690720 | W6 27818 |
| 34 | W6 27825 | Darby Plains 18 | Silphium terebinthinaceum Jacq. | | W6 | | Not Available | 2004 | COLLECTED | | Battelle-Darby Creek Metro Park, Franklin County | | | | Wild material | | 1690804 | W6 27825 |
| 35 | W6 27826 | Darby Plains 19 | Silphium trifoliatum L. | | W6 | | Not Available | 2004 | COLLECTED | | Battelle-Darby Creek Metro Park, Franklin County | | | | Wild material | | 1680163 | W6 27826 |
| 36 | W6 27810 | ALP 18 | Silphium trifoliatum L. | Ohio, United States | W6 | | Not Available | 2004 | COLLECTED | 10/07/2004 | Adams Lake Prairie State Nature Preserve, within Adams Lake State Park, Adams County | 38.81083333, -83.53027778 | | Prairie remnant. Sun. Slope: Slight. | Wild material | 4-6'. Sample size: 10. Population size: 20. Site size: 10 square meters. | 1690590 | W6 27810 |
| 37 | W6 27811 | CP7 | Silphium terebinthinaceum Jacq. | Ohio, United States | W6 | | Not Available | 2004 | COLLECTED | 10/07/2004 | Chaparral Prairie State Nature Preserve, Adams County, 3 miles NW of West Union | 38.83583333, -83.57361111 | | Cedar barrens prairie. 67 acre total area. Sun. Slope: Slight. | Wild material | Ohio state status: Threatened. 5-7'. Sample size: 5. Population size: 10. Site size: 50 square meters. | 1690604 | W6 27811 |
| 38 | W6 27813 | CP20 | Silphium trifoliatum L. | Ohio, United States | W6 | | Not Available | 2004 | COLLECTED | 10/07/2004 | Chaparral Prairie State Nature Preserve, Adams County, 3 miles NW of West Union | 38.83583333, -83.57361111 | | Cedar barrens prairie. 67 acre total area. Sun. Slope: Slight. | Wild material | 4-6'. Sample size: 15. Population size: 20. Site size: 30 square meters. | 1690617 | W6 27813 |
| 39 | OPGC 1873 | OPGC 1873 | Silphium trifoliatum L. | | | | Historic | 2004 | | | | | | | | | 1690538 | OPGC 1873 |
| 40 | W6 27802 | SC 2 | Silphium trifoliatum L. | Ohio, United States | W6 | | Not Available | 2004 | COLLECTED | 09/30/2004 | Smith Cemetery State Nature Preserve, Madison County. West of Columbus on state route 161, South on Kramer Rd, West on Boyd Rd. | 40.10305556, -83.32416667 | | Drainage(1-well, 4-poor): 3 Full sun. Slight slope, south facing. Small prairie remnant in pioneer cemetery, total land area approx 300 ft x 300 ft. Surrounded by farm fields. | Wild material | 4-6'. Lance-leaved, middle leaves in whorls of 3 or 4. Leaves rough; stems smooth. Flowers 1-1/2 - 2" diameter. Sample size: 50. Population size: 500. Site size: 5 square meters | 1690522 | W6 27802 |
| 41 | W6 27807 | PRF 18 | Silphium trifoliatum L. | Ohio, United States | W6 | | Not Available | 2004 | COLLECTED | 09/30/2004 | Prairie Road Fen State Nature Preserve, Clark County | 39.99777778, -83.71361111 | | Drainage(1-well, 4-poor): 2 Sun. Slope: Slight. | Wild material | Sample size: 10. Population size: 30. Site size:10 square meters. | 1690561 | W6 27807 |
| 42 | W6 27808 | PRF 19 | Silphium terebinthinaceum Jacq. | Ohio, United States | W6 | | Not Available | 2004 | COLLECTED | 09/30/2004 | Prairie Road Fen State Nature Preserve, Clark County | 39.99777778, -83.71361111 | | Drainage(1-well, 4-poor): 2 Sun. Slope: Slight. | Wild material | 8'. Sample size: 10. Population size: 30. Site size: 10 square meters. | 1690562 | W6 27808 |
| 43 | W6 27832 | WC 21 | Silphium integrifolium Michx. | Ohio, United States | W6 | | Not Available | 2004 | COLLECTED | 09/11/2004 | Stark County | 40.66666667, -81.65833333 | | | Wild material | | 1690822 | W6 27832 |
| 44 | W6 27833 | WC 23 | Silphium terebinthinaceum Jacq. | Ohio, United States | W6 | | Not Available | 2004 | COLLECTED | 09/11/2004 | Stark County | 40.66666667, -81.65833333 | | | Wild material | | 1690824 | W6 27833 |
| 45 | W6 27834 | WC 29 | Silphium trifoliatum L. | Ohio, United States | W6 | | Not Available | 2004 | COLLECTED | 09/07/2004 | Stark County | 40.66666667, -81.65833333 | | | Wild material | | 1690830 | W6 27834 |
| 46 | W6 27830 | WC 15 | Silphium perfoliatum L. | Ohio, United States | W6 | | Not Available | 2004 | COLLECTED | 09/01/2004 | Tuscarawas County | 40.38333333, -81.40833333 | | | Wild material | | 1690817 | W6 27830 |
| 47 | W6 27821 | Stucker Meadow 24 | Silphium trifoliatum L. | | W6 | | Not Available | 2004 | COLLECTED | | Wayne County | | | | Wild material | | 1690750 | W6 27821 |
| 48 | W6 27822 | Stucker Meadow 41 | Silphium terebinthinaceum Jacq. | | W6 | | Not Available | 2004 | COLLECTED | | Co Rd 149 RR, Wayne County | | | | Wild material | | 1690766 | W6 27822 |
| 49 | W6 27824 | Stucker Meadow 46 | Silphium perfoliatum L. | | W6 | | Not Available | 2004 | COLLECTED | | Prairie Lane, Killbuck Wildlife Area, Wayne County | | | | Wild material | | 1690771 | W6 27824 |
| 50 | W6 19275 | B96-72 | Silphium perfoliatum L. | Bulgaria | | | Historic | 1996 | COLLECTED | 07/1996 | | | | | Wild material | Used as forage. Perennial crop. 19% protein in dry matter. | 1540874 | W6 19275 |
| 51 | W6 17640 | W6 17640 | Silphium perfoliatum L. | Germany | W6 | | | 1994 | DONATED | 03/01/1994 | | | | | Uncertain improvement status | | 1087365 | W6 17640 |
| 52 | NA 68449 | NA 68449 | Silphium laciniatum L. | | NA | | Not Available | 1991 | | | | | | | Cultivated material | Full name as recorded at U.S. National Arboretum: Silphium laciniatum. 10 plants received 10/91 for original prairie planting; 25 more received from same source on 7/19/93 and interplanted with original plants. | 2148140 | NA 68449 |
| 53 | NA 68458 | NA 68458 | Silphium perfoliatum L. | | NA | | Not Available | 1991 | | | | | | | Cultivated material | Full name as recorded at U.S. National Arboretum: Silphium perfoliatum. | 2148145 | NA 68458 |
| 54 | NA 68459 | NA 68459 | Silphium terebinthinaceum Jacq. | | NA | | Not Available | 1991 | | | | | | | Cultivated material | Full name as recorded at U.S. National Arboretum: Silphium terebinthinaceum. | 2148146 | NA 68459 |