sedge
Refers to plants of the sedge family (Cyperaceae), especially the genus Carex. Common in wetlands and often used in traditional thatching.
A lot of sedge grows in the marsh.
Old roofs were thatched with sedge.
softstem bulrush
citron daylily; long yellow daylily
Carex morrowii; Morrow's sedge
nut grass; Cyperus rotundus
Carex alopecuroides var. chlorostachya (sedge species)
Katakana spelling is common and matches usual-kana usage.
Hiragana spelling is also common; the word is usually written in kana.
Kanji form is rare and may be confused with the surname 菅 (かん). The reading すが is obsolete.
The word is native Japanese. The kanji 菅 is a phono-semantic compound, but the exact derivation of the Japanese word is uncertain.