| 0 | PI 386214 | | Forsythia ovata Nakai | Korea, South | NA | | Not Available | 1974 | COLLECTED | 1973 | | | | | | PI Book: From Korea. Seed collected 1973 by Forestry Experiment Station, Seoul and presented through Homiki Uyeki, Agricultural College, Ehime University, Matsuyama, Ehime Ken, Japan. Received March 21, 1974. | 2158609 | PI 386214 |
| 1 | PI 318530 | Col. No. K-177 | Forsythia viridissima Lindl. var. koreana Rehder | Kyonggi, Korea, South | | | Historic | 1967 | COLLECTED | | Near college campus, Suwon | | | | | | 1709420 | PI 318530 |
| 2 | PI 318531 | Col. No.K-218 | Forsythia viridissima Lindl. var. koreana Rehder | Kyonggi, Korea, South | | | Historic | 1967 | COLLECTED | | Hedge on campus of Agriculture College, Seoul National University, Suwon | | | | | | 1709421 | PI 318531 |
| 3 | PI 318532 | Col. No. K-60 | Forsythia ovata Nakai | Korea, South | | | Historic | 1967 | COLLECTED | | Along trail in sun at edge of woods, base of Mt. Sorak, Kangwon-do | | | | | | 1709422 | PI 318532 |
| 4 | PI 318533 | Col. No. K-61 | Forsythia ovata Nakai | Korea, South | | | Historic | 1967 | COLLECTED | | Along trail near streambed at base of Mt. Sorak, Kangwon-do | | | | | | 1709423 | PI 318533 |
| 5 | PI 317229 | Col. No. K-293 | Forsythia sp. | Seoul-teukbyeolsi, Korea, South | | | Historic | 1966 | COLLECTED | | Grounds of Forest Experiment Station, Seoul | | | | | | 1708741 | PI 317229 |
| 6 | PI 316967 | NA 40579 | Forsythia ovata Nakai | Gangwon-do, Korea, South | NA | | Not Available | 1966 | COLLECTED | | along stream near Sorak Dong | 38.17361500, 128.49026500 | | | Wild material | | 1236167 | PI 316967 |
| 7 | PI 262255 | 'Athrocaulis Nymans' | Forsythia suspensa (Thunb.) Vahl | Overijssel, Netherlands | | | Historic | 1959 | DONATED | 12/23/1959 | | | | | | | 1566857 | PI 262255 |
| 8 | PI 188994 | | Forsythia japonica Makino | Japan | | | Historic | 1950 | COLLECTED | | | | | | | | 1669055 | PI 188994 |
| 9 | PI 108760 | No. 143-A | Forsythia europaea Degen & Bald. | Serbia | | | Historic | 1935 | COLLECTED | | Pec | | | | | | 1798989 | PI 108760 |
| 10 | PI 107723 | No. 143 | Forsythia europaea Degen & Bald. | Serbia | | | Historic | 1934 | COLLECTED | | Pec | | | | | | 1797457 | PI 107723 |
| 11 | PI 104143 | | Forsythia viridissima Lindl. var. koreana Rehder | Unknown | | | Historic | 1934 | COLLECTED | | Chosen | | | | | | 1792530 | PI 104143 |
| 12 | PI 98145 | | Forsythia ×intermedia Zabel | England, United Kingdom | | | Historic | 1932 | COLLECTED | | | | | | | | 1784845 | PI 98145 |
| 13 | PI 90790 | | Forsythia ovata Nakai | Unknown | | | Historic | 1930 | COLLECTED | | Chosen | | | | | | 1775435 | PI 90790 |
| 14 | PI 90748 | No. 7458 | Forsythia suspensa (Thunb.) Vahl | Beijing Shi, China | | | Historic | 1930 | COLLECTED | 11/08/1930 | Court of the Cheng Kuo Ssu Temple near Patachu | | | | | | 1775408 | PI 90748 |
| 15 | PI 82477 | | Forsythia viridissima Lindl. var. koreana Rehder | Seoul-teukbyeolsi, Korea, South | | | Historic | 1929 | COLLECTED | | | | | | | | 1746168 | PI 82477 |
| 16 | PI 82082 | No. 1628 | Forsythia sp. | Seoul-teukbyeolsi, Korea, South | | | Historic | 1929 | COLLECTED | 10/26/1929 | | | | | | | 1745733 | PI 82082 |
| 17 | PI 76579 | | Forsythia ×intermedia Zabel | England, United Kingdom | | | Historic | 1928 | COLLECTED | | | | | | | | 1731184 | PI 76579 |
| 18 | PI 66291 | | Forsythia ×intermedia Zabel | England, United Kingdom | | | Historic | 1926 | COLLECTED | | | | | | | | 1717906 | PI 66291 |
| 19 | PI 62284 | | Forsythia ovata Nakai | Provence-Alpes-Côte-d’Azur, France | | | Historic | 1925 | COLLECTED | | | | | | | | 1663462 | PI 62284 |
| 20 | PI 52643 | 'Sport' | Forsythia sp. | England, United Kingdom | | | Historic | 1921 | COLLECTED | | | | | | | | 1624555 | PI 52643 |
| 21 | PI 37477 | Lien ch'iao | Forsythia suspensa (Thunb.) Vahl | Shaanxi Sheng, China | | | Historic | 1914 | COLLECTED | 12/29/1913 | | | | | | | 1602420 | PI 37477 |
| 22 | PI 37004 | No. 1044 | Forsythia suspensa (Thunb.) Vahl | Beijing Shi, China | | | Historic | 1914 | COLLECTED | 12/01/1913 | | | | | | | 1516111 | PI 37004 |
| 23 | WLP 1195 | NACPEC18-069 | Forsythia suspensa (Thunb.) Vahl | Hubei Sheng, China | NA | | | 2018 | COLLECTED | 09/19/2018 | Shennongjia Forest District; Mawan; Mawan. | 31.83165000, 110.63415000 | 966 | Steep north-facing slope above rock outcropping, above ruderal area. Soil rocky, with humus. | | Seeds and four herbarium specimens collected from three plants. Photographed. | 2108981 | WLP 1195 |
| 24 | NA 77150 | 'McKCitrine' | Forsythia viridissima Lindl. | | NA | | Not Available | 2008 | | | | | | | Cultivar | Full name as recorded at U.S. National Arboretum: Forsythia viridissima 'McKCitrine' CITRUS SWIZZLE. | 2150948 | NA 77150 |
| 25 | NA 77141 | 'Ford Freeway' | Forsythia ×intermedia Zabel | | NA | | Not Available | 2008 | | | | | | | Cultivar | Full name as recorded at U.S. National Arboretum: Forsythia x intermedia 'Ford Freeway'. | 2150942 | NA 77141 |
| 26 | NA 76417 | 'Kumsom' | Forsythia viridissima Lindl. var. koreana Rehder | | NA | | Not Available | 2007 | | | | | | | Cultivar | Full name as recorded at U.S. National Arboretum: Forsythia viridissima var. koreana 'Kumsom'. | 2150695 | NA 76417 |
| 27 | NA 75785 | NACPEC05068 | Forsythia giraldiana Lingelsh. | China | NA | | Not Available | 2005 | COLLECTED | | Gansu Province: Gannan Tibetan Autonomous Prefecture, Tewo County (Diebu County): ., Coll. north of Lazikou. | 34.13300000, 103.88450000 | 2021 | mixed deciduous/coniferous forest; steep-walled gorge running north-south; growing along roadside., 45 degrees, NE, rocky silt-loam | | | 1922646 | NA 75785 |
| 28 | NA 74000 | 'Gold Leaf' | Forsythia ×intermedia Zabel | | NA | | Not Available | 2004 | | | | | | | Cultivar | Full name as recorded at U.S. National Arboretum: Forsythia x intermedia 'Gold Leaf'. | 2149883 | NA 74000 |
| 29 | NA 72434 | NACPEC02046 | Forsythia suspensa (Thunb.) Vahl | Shaanxi Sheng, China | NA | | Not Available | 2002 | COLLECTED | 09/20/2002 | | | | | Wild material | | 1777428 | NA 72434 |
| 30 | NA 71012 | NA 71012 | Forsythia ovata Nakai | | NA | | Not Available | 2001 | COLLECTED | | | | | | Cultivated material | Chinese shrub, seed was collected from cultivated plants. | 1631567 | NA 71012 |
| 31 | NA 64800 | WD033 | Forsythia giraldiana Lingelsh. | Hubei Sheng, China | NA | | Not Available | 1994 | COLLECTED | 09/17/1994 | Near Guan Shan. | 32.44972222, 110.96138889 | | South slope, cut-over, with Castanea mollissima, Acer cappadocicum var. sinicum, Miscanthus sp., Quercus serrata. | Wild material | | 1511204 | NA 64800 |
| 32 | NA 68467 | NA 68467 | Forsythia suspensa (Thunb.) Vahl | | NA | | Not Available | 1994 | | | | | | | Cultivated material | Full name as recorded at U.S. National Arboretum: Forsythia suspensa. Replaced NA 63099 - 3 plants of F. suspensa which died early Spring 1994 due to winter damage. From cuttings taken 10/8/92 [from William Paca Garden]. | 2148150 | NA 68467 |
| 33 | NA 60205 | NA 60205 | Forsythia japonica Makino | | NA | | Not Available | 1988 | | | | | | | Cultivated material | Full name as recorded at U.S. National Arboretum: Forsythia japonica. Originally from Furuse 1986. | 2146652 | NA 60205 |
| 34 | NA 60204 | NA 60204 | Forsythia togashii H. Hara | District of Columbia, United States | | | Historic | 1988 | DONATED | 04/1988 | | | | | Cultivated material | | 1111772 | NA 60204 |
| 35 | NA 57878 | NA 57878 | Forsythia japonica Makino | Sizuoka, Japan | NA | | Not Available | 1986 | COLLECTED | | seed collected; the area around Oshino-Mura village near Mt. Fuji | 35.62500000, 138.84166000 | | | Wild material | | 1111497 | NA 57878 |
| 36 | Ames 2955 | 'Northern Sun' | Forsythia hybr. | Ontario, Canada | | | Historic | 1984 | DONATED | PRE 1984 | | | | | Cultivar | Distributed for regional trial in 1982. | 1022693 | Ames 2955 |
| 37 | NA 53179 | 'Lynwood' | Forsythia ×intermedia Zabel | | NA | | Not Available | 1984 | | | | | | | Cultivar | Full name as recorded at U.S. National Arboretum: Forsythia x intermedia 'Lynwood'. Purchased for the 1984 Washington Flower Show | 2145752 | NA 53179 |
| 38 | NA 52696 | 'Spring Glory' | Forsythia ×intermedia Zabel | | NA | | Not Available | 1984 | | | | | | | Cultivar | Full name as recorded at U.S. National Arboretum: Forsythia x intermedia 'Spring Glory'. Purchased for the 1984 Washington Flower Show | 2145702 | NA 52696 |
| 39 | Ames 2838 | 'Meadowlark' | Forsythia hybr. | | NC7 |  | | 1984 | DONATED | 1973 | | | | | Cultivar | This cultivar is a hybrid of Forsythia ovata and Forsythia europaea, an outcome of the breeding work by Dr. Karl Sax and Haig Derman at the Arnold Arboretum. It was selected by Dr. Harrison Flint for being the only Forsythia with a full flower display after the exceptionally cold winter of 1966-67. After being trialed in North and South Dakota for ten years as well as being trialed in the NC7 Trials Program in 1973, it was introduced as 'Meadowlark' in 1983. This selection is noted for being vigorous and having reliably cold hardy flower buds, growing to 2.75 meters in height. Several controlled freezing experiments have confirmed the extreme winter hardiness of the flower buds on this cultivar (McNamara & Pellet 1993, Flinn & Ashworth 1999, McNamara et al. 2002). | 1022143 | Ames 2838 |
| 40 | NA 51508 | 'Vermont Sun' | Forsythia mandschurica Uyeki | | NA | | Not Available | 1983 | | | | | | | Cultivar | Full name as recorded at U.S. National Arboretum: Forsythia mandschurica 'Vermont Sun'. Ref: x 3/9/83 HMCathey to RJ. Parentage: Selection by Hort. Dept., U. Vermont. The species F. mandschurica was introduced by the Montreal Botanical Garden from Mr. L. Pitchsin from Harbin, Mandschurica in 1940. (Handwriting on card difficult to read, name spelling as accurate as possible.) | 2145576 | NA 51508 |
| 41 | NA 51509 | 'New Hampshire Gold' | Forsythia ×intermedia Zabel | | NA | | Not Available | 1983 | | | | | | | Cultivar | Full name as recorded at U.S. National Arboretum: Forsythia x intermedia 'New Hampshire Gold'. Parentage: F. ovata female x F. 'Lynwood Gold' male; reference x3/9/83 HMCathey to RJ | 2145577 | NA 51509 |
| 42 | NA 40579 | NA 40579 | Forsythia ovata Nakai | | NA | | Not Available | 1977 | | | | | | | | | 1950256 | NA 40579 |