| 0 | PI 443303 | | Kniphofia uvaria (L.) Oken | New York, United States | W6 | | Not Available | 1980 | DEVELOPED | PRE 05/1980 | | | | | Cultivated material | | 1338239 | PI 443303 |
| 1 | PI 310408 | 2273 | Kniphofia foliosa Hochst. | Former, Soviet Union | W6 | | | 1966 | COLLECTED | | Tashkent | | | | Uncertain improvement status | | 1231613 | PI 310408 |
| 2 | PI 196193 | | Kniphofia uvaria (L.) Oken | South Africa | | | Historic | 1951 | COLLECTED | | | | | | | | 1673578 | PI 196193 |
| 3 | PI 190394 | | Kniphofia sp. | Florida, United States | | | Historic | 1950 | COLLECTED | | | | | | | | 1670239 | PI 190394 |
| 4 | PI 149353 | 'Amato' | Kniphofia sp. | Maryland, United States | | | Historic | 1944 | COLLECTED | | | | | | | | 1883898 | PI 149353 |
| 5 | PI 110453 | 'Dr. Legate' | Kniphofia sp. | England, United Kingdom | | | Historic | 1935 | COLLECTED | | | | | | | | 1801887 | PI 110453 |
| 6 | PI 110454 | 'Greybeard' | Kniphofia sp. | England, United Kingdom | | | Historic | 1935 | COLLECTED | | | | | | | | 1801888 | PI 110454 |
| 7 | PI 110455 | 'Lighthouse' | Kniphofia sp. | England, United Kingdom | | | Historic | 1935 | COLLECTED | | | | | | | | 1801889 | PI 110455 |
| 8 | PI 110456 | 'Mrs. Samuel Smith' | Kniphofia sp. | England, United Kingdom | | | Historic | 1935 | COLLECTED | | | | | | | | 1801890 | PI 110456 |
| 9 | PI 110457 | 'Northiae Kathart' | Kniphofia sp. | England, United Kingdom | | | Historic | 1935 | COLLECTED | | | | | | | | 1801891 | PI 110457 |
| 10 | PI 110458 | 'Preziosa' | Kniphofia sp. | England, United Kingdom | | | Historic | 1935 | COLLECTED | | | | | | | | 1801892 | PI 110458 |
| 11 | PI 110459 | 'R. Wilson Kerr' | Kniphofia sp. | England, United Kingdom | | | Historic | 1935 | COLLECTED | | | | | | | | 1801894 | PI 110459 |
| 12 | PI 110460 | 'Searchlight' | Kniphofia sp. | England, United Kingdom | | | Historic | 1935 | COLLECTED | | | | | | | | 1801895 | PI 110460 |
| 13 | PI 110461 | 'Vincent's Delight' | Kniphofia sp. | England, United Kingdom | | | Historic | 1935 | COLLECTED | | | | | | | | 1801896 | PI 110461 |
| 14 | PI 104968 | 'C.M. Prichard' | Kniphofia sp. | England, United Kingdom | | | Historic | 1934 | COLLECTED | | | | | | | | 1793567 | PI 104968 |
| 15 | PI 104969 | 'Dr. Legate' | Kniphofia sp. | England, United Kingdom | | | Historic | 1934 | COLLECTED | | | | | | | | 1793568 | PI 104969 |
| 16 | PI 104970 | 'Erecta' | Kniphofia sp. | England, United Kingdom | | | Historic | 1934 | COLLECTED | | | | | | | | 1793569 | PI 104970 |
| 17 | PI 104971 | 'Greybeard' | Kniphofia sp. | England, United Kingdom | | | Historic | 1934 | COLLECTED | | | | | | | | 1793570 | PI 104971 |
| 18 | PI 104972 | 'Lemon Queen' | Kniphofia sp. | England, United Kingdom | | | Historic | 1934 | COLLECTED | | | | | | | | 1793571 | PI 104972 |
| 19 | PI 104973 | 'Leviathan' | Kniphofia sp. | England, United Kingdom | | | Historic | 1934 | COLLECTED | | | | | | | | 1793572 | PI 104973 |
| 20 | PI 104974 | 'Lighthouse' | Kniphofia sp. | England, United Kingdom | | | Historic | 1934 | COLLECTED | | | | | | | | 1793573 | PI 104974 |
| 21 | PI 104975 | 'Majestic' | Kniphofia sp. | England, United Kingdom | | | Historic | 1934 | COLLECTED | | | | | | | | 1793574 | PI 104975 |
| 22 | PI 104976 | 'Mrs. Samuel Smith' | Kniphofia sp. | England, United Kingdom | | | Historic | 1934 | COLLECTED | | | | | | | | 1793575 | PI 104976 |
| 23 | PI 104977 | 'Preziosa' | Kniphofia sp. | England, United Kingdom | | | Historic | 1934 | COLLECTED | | | | | | | | 1793576 | PI 104977 |
| 24 | PI 104978 | 'Searchlight' | Kniphofia sp. | England, United Kingdom | | | Historic | 1934 | COLLECTED | | | | | | | | 1793577 | PI 104978 |
| 25 | PI 104979 | 'Triumphans' | Kniphofia sp. | England, United Kingdom | | | Historic | 1934 | COLLECTED | | | | | | | | 1793578 | PI 104979 |
| 26 | PI 104980 | 'Vincent's Delight' | Kniphofia sp. | England, United Kingdom | | | Historic | 1934 | COLLECTED | | | | | | | | 1793579 | PI 104980 |
| 27 | PI 98327 | 'Egypt' | Kniphofia hybr. | Netherlands | | | Historic | 1932 | COLLECTED | | | | | | | | 1785432 | PI 98327 |
| 28 | PI 98328 | 'Excellence' | Kniphofia hybr. | Netherlands | | | Historic | 1932 | COLLECTED | | | | | | | | 1785433 | PI 98328 |
| 29 | PI 98329 | 'Lord Roberts' | Kniphofia hybr. | Netherlands | | | Historic | 1932 | COLLECTED | | | | | | | | 1785434 | PI 98329 |
| 30 | PI 91631 | 'Mirabilis' | Kniphofia hybr. | Sachsen-Anhalt, Germany | | | Historic | 1931 | COLLECTED | | | | | | | | 1778029 | PI 91631 |
| 31 | PI 91283 | | Kniphofia hybr. | England, United Kingdom | | | Historic | 1931 | COLLECTED | | | | | | | | 1776088 | PI 91283 |
| 32 | PI 90094 | 'Aurantiaca' | Kniphofia hybr. | England, United Kingdom | | | Historic | 1930 | COLLECTED | | | | | | | | 1498320 | PI 90094 |
| 33 | PI 90095 | 'Bertram O. Prichard' | Kniphofia hybr. | England, United Kingdom | | | Historic | 1930 | COLLECTED | | | | | | | | 1756478 | PI 90095 |
| 34 | PI 90096 | 'F. Burbridge' | Kniphofia hybr. | England, United Kingdom | | | Historic | 1930 | COLLECTED | | | | | | | | 1756479 | PI 90096 |
| 35 | PI 90097 | 'Glitter' | Kniphofia hybr. | England, United Kingdom | | | Historic | 1930 | COLLECTED | | | | | | | | 1756480 | PI 90097 |
| 36 | PI 90098 | 'Grand Pyramid' | Kniphofia hybr. | England, United Kingdom | | | Historic | 1930 | COLLECTED | | | | | | | | 1756481 | PI 90098 |
| 37 | PI 90099 | 'Mount Etna' | Kniphofia hybr. | England, United Kingdom | | | Historic | 1930 | COLLECTED | | | | | | | | 1756482 | PI 90099 |
| 38 | PI 90100 | 'Mrs. Walker Monro' | Kniphofia hybr. | England, United Kingdom | | | Historic | 1930 | COLLECTED | | | | | | | | 1756483 | PI 90100 |
| 39 | PI 90101 | 'Mrs. Wynne Hood' | Kniphofia hybr. | England, United Kingdom | | | Historic | 1930 | COLLECTED | | | | | | | | 1757484 | PI 90101 |
| 40 | PI 90102 | 'Ruby' | Kniphofia hybr. | England, United Kingdom | | | Historic | 1930 | COLLECTED | | | | | | | | 1757485 | PI 90102 |
| 41 | PI 90103 | 'R. Wilson Kerr' | Kniphofia hybr. | England, United Kingdom | | | Historic | 1930 | COLLECTED | | | | | | | | 1757486 | PI 90103 |
| 42 | PI 90104 | 'Sir C.K. Butler' | Kniphofia hybr. | England, United Kingdom | | | Historic | 1930 | COLLECTED | | | | | | | | 1757487 | PI 90104 |
| 43 | PI 90105 | Sunset | Kniphofia hybr. | England, United Kingdom | | | Historic | 1930 | COLLECTED | | | | | | | | 1757490 | PI 90105 |
| 44 | PI 90106 | 'Triumph' | Kniphofia hybr. | England, United Kingdom | | | Historic | 1930 | COLLECTED | | | | | | | | 1757491 | PI 90106 |
| 45 | PI 81974 | 'Jaune Supreme' | Kniphofia gracilis Harv. ex Baker | North Holland, Netherlands | | | Historic | 1929 | COLLECTED | | | | | | | | 1495028 | PI 81974 |
| 46 | PI 81975 | 'Orange Beauty' | Kniphofia gracilis Harv. ex Baker | North Holland, Netherlands | | | Historic | 1929 | COLLECTED | | | | | | | | 1745649 | PI 81975 |
| 47 | PI 81976 | 'Orange Princess' | Kniphofia gracilis Harv. ex Baker | North Holland, Netherlands | | | Historic | 1929 | COLLECTED | | | | | | | | 1745650 | PI 81976 |
| 48 | PI 81977 | 'Sovereign' | Kniphofia gracilis Harv. ex Baker | North Holland, Netherlands | | | Historic | 1929 | COLLECTED | | | | | | | | 1745651 | PI 81977 |
| 49 | PI 81978 | 'Ophir' | Kniphofia hybr. | North Holland, Netherlands | | | Historic | 1929 | COLLECTED | | | | | | | | 1745652 | PI 81978 |
| 50 | PI 81979 | 'Royal Standard' | Kniphofia hybr. | North Holland, Netherlands | | | Historic | 1929 | COLLECTED | | | | | | | | 1745653 | PI 81979 |
| 51 | PI 81980 | 'R. Wilson' | Kniphofia hybr. | North Holland, Netherlands | | | Historic | 1929 | COLLECTED | | | | | | | | 1745654 | PI 81980 |
| 52 | PI 81981 | 'Solfatare' | Kniphofia hybr. | North Holland, Netherlands | | | Historic | 1929 | COLLECTED | | | | | | | | 1745655 | PI 81981 |
| 53 | PI 69931 | | Kniphofia laxiflora Kunth | Scotland, United Kingdom | | | Historic | 1926 | COLLECTED | | | | | | | | 1723148 | PI 69931 |
| 54 | PI 67376 | | Kniphofia caulescens Baker ex Hook. f. | England, United Kingdom | | | Historic | 1926 | COLLECTED | | | | | | | | 1719700 | PI 67376 |
| 55 | PI 66960 | | Kniphofia ensifolia Baker | Île-de-France, France | | | Historic | 1926 | COLLECTED | | | | | | | | 1719344 | PI 66960 |
| 56 | PI 67061 | 'Nobilis' | Kniphofia uvaria (L.) Oken | Île-de-France, France | | | Historic | 1926 | COLLECTED | | | | | | | | 1719436 | PI 67061 |
| 57 | PI 67062 | 'Saundersii' | Kniphofia uvaria (L.) Oken | Île-de-France, France | | | Historic | 1926 | COLLECTED | | | | | | | | 1719437 | PI 67062 |
| 58 | PI 32970 | | Kniphofia caulescens Baker ex Hook. f. | Liguria, Italy | | | Historic | 1912 | COLLECTED | | | | | | | | 1598571 | PI 32970 |
| 59 | PI 32971 | | Kniphofia laxiflora Kunth | Liguria, Italy | | | Historic | 1912 | COLLECTED | | | | | | | | 1598572 | PI 32971 |
| 60 | PI 32972 | | Kniphofia nelsonii Mast. | Liguria, Italy | | | Historic | 1912 | COLLECTED | | | | | | | | 1598573 | PI 32972 |
| 61 | PI 32973 | | Kniphofia tuckii Leichtlin ex Baker | Liguria, Italy | | | Historic | 1912 | COLLECTED | | | | | | | | 1598579 | PI 32973 |
| 62 | PI 28525 | PIG No. 6509 | Kniphofia northiae Baker | New Jersey, United States | | | Historic | 1910 | COLLECTED | | | | | | | | 1594494 | PI 28525 |
| 63 | PI 28526 | | Kniphofia tuckii Leichtlin ex Baker | New Jersey, United States | | | Historic | 1910 | COLLECTED | | | | | | | | 1594495 | PI 28526 |
| 64 | PI 26191 | | Kniphofia uvaria (L.) Oken | District of Columbia, United States | | | Historic | 1909 | COLLECTED | | | | | | | | 1523484 | PI 26191 |
| 65 | PI 13631 | | Kniphofia hybr. | England, United Kingdom | | | Historic | 1905 | COLLECTED | | | | | | | | 1529069 | PI 13631 |
| 66 | PI 13632 | | Kniphofia sp. | England, United Kingdom | | | Historic | 1905 | COLLECTED | | | | | | | | 1529070 | PI 13632 |
| 67 | PI 9105 | | Kniphofia uvaria (L.) Oken | Provence-Alpes-Côte-d’Azur, France | | | Historic | 1902 | COLLECTED | | | | | | | | 1548551 | PI 9105 |
| 68 | NA 88867 | 'High Roller' | Kniphofia hybr. | Michigan, United States | NA | | Not Available | 2024 | DEVELOPED | PRE 03/2024 | | | | | Cultivar | Full name as recorded at the U.S. National Arboretum: Kniphofia 'High Roller' | 2190932 | NA 88867 |
| 69 | NA 88868 | 'Lady Luck' | Kniphofia hybr. | Michigan, United States | NA | | Not Available | 2024 | DEVELOPED | PRE 03/2024 | | | | | Cultivar | Full name as recorded at the U.S. National Arboretum: Kniphofia 'Lady Luck' | 2190933 | NA 88868 |
| 70 | NA 85805 | 'Backdraft' | Kniphofia hybr. | | NA | | Not Available | 2019 | | | | | | | Cultivar | Full name as recorded at U.S. National Arboretum: Kniphofia 'Backdraft'. | 2154416 | NA 85805 |
| 71 | NA 85806 | 'Rocket's Red Glare' | Kniphofia hybr. | | NA | | Not Available | 2019 | | | | | | | Cultivar | Full name as recorded at U.S. National Arboretum: Kniphofia 'Rocket's Red Glare'. | 2154417 | NA 85806 |
| 72 | NA 81853 | 'Papaya Popsicle' | Kniphofia hybr. | | NA | | Not Available | 2014 | | | | | | | Cultivar | Full name as recorded at U.S. National Arboretum: Kniphofia 'Papaya Popsicle'. | 2152682 | NA 81853 |
| 73 | NA 81854 | 'Pineapple Popsicle' | Kniphofia hybr. | | NA | | Not Available | 2014 | | | | | | | Cultivar | Full name as recorded at U.S. National Arboretum: Kniphofia 'Pineapple Popsicle'. | 2152683 | NA 81854 |
| 74 | NA 77193 | 'Bengal Fire' | Kniphofia hybr. | | NA | | Not Available | 2007 | | | | | | | Cultivar | Full name as recorded at U.S. National Arboretum: Kniphofia 'Bengal Fire'. | 2150980 | NA 77193 |
| 75 | NA 77073 | 'Timothy' | Kniphofia hybr. | | NA | | Not Available | 2007 | | | | | | | Cultivar | Full name as recorded at U.S. National Arboretum: Kniphofia 'Timothy'. | 2150918 | NA 77073 |
| 76 | NA 77096 | 'Wayside Flame' | Kniphofia hybr. | | NA | | Not Available | 2007 | | | | | | | Cultivar | Full name as recorded at U.S. National Arboretum: Kniphofia 'Wayside Flame'. | 2150925 | NA 77096 |
| 77 | NA 65743 | NA 65743 | Kniphofia galpinii Baker | | NA | | Not Available | 1994 | | | | | | | Cultivated material | Full name as recorded at U.S. National Arboretum: Kniphofia galpinii. | 2147604 | NA 65743 |