ずそうかんあおい (豆相寒葵) [Index] [Back] わが国の固有種で、本州の伊豆半島中部および丹沢山地西部に分布しています。山地の広葉樹林の林床に生え、高さは１０センチほどになります。「おとめあおい（乙女葵）」を基本種とする亜種です。葉は卵形または三角状卵形で、基部は心形になります。葉の表面は緑色で光沢がなく、短毛が散生して、しばしば雲紋状の斑紋が入ります。１０月から１１月ごろ、根際に褐色または緑褐色の花を咲かせます。萼筒は筒形で縦に長く、上部が括れることはありません。また萼裂片は三角状卵形で、萼筒より短いのが特徴です。和名は、伊豆地方と相模地方に分布することに因みます。レッドリストでは準絶滅危惧種（NT）に分類されています。  ウマノスズクサ科カンアオイ属の常緑多年草で、学名は Asarum savatieri ssp. pseudosavatieri var. pseudosavatieri (syn. Asarum savatieri ssp. pseudosavatieri、Heterotropa savatieri ssp. pseudosavatieri)。英名はありません。  The "Zuso-kan-aoi" (Asarum savatieri ssp. pseudosavatieri var. pseudosavatieri) belongs to Aristolochiaceae (the Birthwort family). It is an evergreen perennial herb that is an endemic species of Japan, and is found in the central Izu Peninsula and western Tanzawa Mountains of Honshu. It grows on the forest floor of broad-leaved forests in mountainous areas, and grows to a height of around 10 cm. It is a subspecies based on the "Otome-aoi" as its elementary species. The leaves are ovate or triangular-ovate in shape, with a cordate base. The leaves are green and lack a sheen, and are covered in short hairs, often with cloud-like patterns. From October to November, brown or greenish-brown flowers bloom near the roots. The calyx tube is tubular and long, and does not constrict at the top. The calyx lobes are triangular-ovate in shape, and are shorter than the calyx tube. The Japanese name "zuso" is derived from the fact that it is distributed in the Izu (zu) and Sagami (so) regions. It is classified as a near-threatened species (NT) on the Red List.  茨城県つくば市「つくば実験植物園」にて、2024年11月29日撮影。  Shu Suehiro shu@botanic.jp