Bolboschoenus fluviatilis




Family Cyperaceae
Scientific name Bolboschoenus fluviatilis (Torrey) Soják
Synonyms Bolboschoenus fluviatilis (Torrey) T.Koyama subsp. yagara (Ohwi) T.Koyama; Scirpus fluviatilis (Torrey) A. Gray; Scirpus maritimus (L.) Palla var. fluviatilis Torrey; Scirpus yagara Ohwi; Schoenoplectus fluviatilis (Torrey) M. Strong
Common name (Japanese common name) uki-yagara (ウキヤガラ, 浮矢柄 [meaning: floating yagara (yagara = shaft of arrow)])
(English common name) river bulrush
Distribution (Japan) Honshu, Shikoku, Kyushu
(Other nations) China, Taiwan, Indonesia, Australia, New Zealand, Canada, USA
Habitat Swamp
Chromosomal number 2n=94, 110
Description Bulbs 3-4cm across. Culms 80-150cm tall, 7-11mm wide. Leaves 5-10mm wide. Flowers inflorescences 3-8cm across, flowering in May to October. Perennial plants.
Reference Bolboschoenus fluviatilis (Torr.) Soják
Schoenoplectus fluviatilis (Torr.) M.T. Strong
Bolboschoenus fluviatilis (Torrey) Soják
Note Japanese authors may divide Bolboschoenus fluviatilis into some local variations or subspecies.



May 2006
at Hitach Coastal Park
May 2006
at Hitach Coastal Park
May 2006
at Hitach Coastal Park



May 2007
at lowland swamp
May 2007
at lowland swamp
May 2007
at lowland swamp