せんだいざさ (仙台笹) [Index] [Back] わが国の固有種で、北海道から本州に分布しています。暖温帯上部から冷温帯に生え、稈の高さは１００〜１５０センチになります。「みやこざさ（都笹）」の近縁です。稈の節間は長く、節は球状に膨れ、枝は節に１個つきます。稈鞘（稈を巻くようについている皮）には逆向きの細毛があり、葉鞘は長さ６〜９センチで開出する細毛が密生し、肩毛（葉耳についている毛）は剛毛で放射状に広がります。葉は披針形で長さ４〜１７センチ、幅８〜２３ミリで、葉の上面は無毛、下面は軟毛が密生します。別名で「おおくまざさ（大隈笹）」とも呼ばれます。  イネ科ササ属のササ類で、学名は Sasa chartacea (syn. Sasa sendaica)。英名はありません。  The "Sendai-zasa" (Sasa chartacea) belongs to Poaceae (the Grass family). It is a bumboo that is a species native to Japan, and is found from Hokkaido to Honshu. It grows in the warm temperate zone and cool temperate zone, and the height of the culm is 100 to 150 cm. It is related to the "Miyako-zasa" (Sasa nipponica). The internodes of the culm are long, the nodes are swollen into a spherical shape, and there is one branch at each node. The culm sheath (the skin that wraps around the culm) has fine hairs that grow in the opposite direction, the leaf sheath is 6-9 cm long and densely covered in spreading fine hairs, and the oral setae (the hairs on the auricles) are bristles that spread out in a radial pattern. The leaves are lanceolate, 4-17 cm long and 8-23 mm wide, with the upper surface hairless and the lower surface densely covered in soft hairs. It is also known by the name "Oo-kuma-zasa".  宮城県仙台市太白区「仙台市野草園」にて、2024年11月10日撮影。  Shu Suehiro shu@botanic.jp