Lysimachia thyrsiflora




Family Myrsinaceae (also placed in Primulaceae)
Scientific name Lysimachia thyrsiflora L.
Synonyms Naumburgia guttata Moench; Naumburgia thyrsiflora (L.) Duby; Nummularia thyrsiflora (L.) Kuntze; Naumburgia thyrsiflora (L.) Reichenbach
Common name (Japanese common name) yanagi tora-no-o (ヤナギトラノオ, 柳虎尾 [meaning: willow leaved tiger tail])
(English common name) tufted loosestrife, water loosestrife
Distribution (Japan) Hokkaido, Honshu (north of Central region)
(Other nations) Russia, Korea, China, Europe, Canada, USA
Habitat Swamp
Chromosomal number 2n=20, 40, 42
Description Plants 30-80cm tall. Leaves 4-10cm long, 0.8-4.5cm wide. Flowers yellow corollas 0.8-1cm across, 6 stamens, flowering in May to August. Fruits ca. 2.5mm across. Perennial plants.
Reference Lysimachia thyrsiflora Linnaeus
Lysimachia thyrsiflora L.
Lysimachia thyrsiflora L.
Lysimachia L.



May 2008
at Tsukuba Botanical Garden
May 2008
at Tsukuba Botanical Garden
May 2008
at Tsukuba Botanical Garden



May 2008
at Tsukuba Botanical Garden



March 2009
at Tsukuba Botanical Garden