| Family | Caryophyllaceae |
| Subfamily | Caryophylloideae |
| Tribe | Sileneae |
| Scientific name | Silene sieboldii (Van Houtte) H. Ohashi & H. Nakai |
| Synonyms | Lychnis cognata Maximovicz; Lychnis fulgens Fischer ex Sims var. cognata (Maximowicz) Regel; Lychnis sieboldii Van Houtte; Lychnis speciosa Carrière; Silene cognata (Maximowicz) H. Ohashi & H. Nakai |
| Common name | (Japanese common name) matsumoto-senno (マツモトセンノウ, 松本仙翁 [meaning: Matsumoto Koshiro's senno (Matsumoto Koshiro was a famous Kabuki actor, senno = flower found at Sennoji Temple)]) |
| (English common name) none | |
| Distribution | (Japan) Kyushu (around Mt. Aso) |
| (Other nations) Russia, Korea, China | |
| Habitat | Mountane field |
| Chromosomal number | 2n=24 |
| Description | Plants 90cm tall, hairy. Flowers pedicels 5-10mm long, calyxs 21-14mm long, red (or merely white) corollas 4.5-5.5cm across, flowering in June to August. Fruits 15-22mm long, seeds 1.5mm long. Perennial plants. |
| Reference | Lychnis cognata Maximowicz |
| Note | Rare species. |
| June 2007 at Kyoto Botanical Garden |
June 2007 at Kyoto Botanical Garden |
June 2007 at Kyoto Botanical Garden |