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| September 2008 at Mt. Tsukuba |
September 2008 at Mt. Tsukuba |
September 2008 at Mt. Tsukuba |
| Family | Asteraceae (alt. Compositae) |
| Scientific name | Lactuca raddeana Maximowicz var. elata (Hemsley) Kitamura |
| Synonyms | Lactuca aogashimaensis Kitamura; Lactuca elata Hemsley, non Salisbury; Lactuca raddeana var. compacta Baranov & Skvortsov; Pterocypsera elata (Hemsley) C. Shih; Prenanthes hieracifolia H. Léveillé |
| Common name | (Japanese common name) yama-nigana (ヤマニガナ, 山苦菜 [meaning: mountain bitter herb]) |
| (English common name) none | |
| Distribution | (Japan) Hokkaido, Honshu, Shikoku, Kyushu, Okinawa |
| (Other nations) Russia (Far East), China, Vietnam | |
| Habitat | Mountane forest edge or field |
| Chromosomal number | n=9, 2n=18 |
| Description | Plants electing 60-200cm tall. Leaves 10-15cm long. Flowers 8- 10 yellow florets each ca. 1cm across, flowering in August to September. Fruits 2.5-4mm long. Annual or winter annual plants. |
| Rference | Lactuca raddeana Maxim. |
| Note | Lactuca raddeana Maximowicz var. raddeana occurs in northern Kyushu of Japan, Korea and China. |
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| September 2008 at Mt. Tsukuba |
September 2008 at Mt. Tsukuba |
September 2008 at Mt. Tsukuba |
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| September 2008 at Mt. Tsukuba |
September 2008 at Mt. Tsukuba |
September 2008 at Mt. Tsukuba |
