narrow dwarf day-lily

...Day lilies (also known as Hemerocallis nikkoensis) H. dumortierii Morren var. esculenta (Koidz.) Kitam. (illustration), famous for their large colonies in Oze, are found mainly in the marshes of high mountains from northern Kinki to Hokkaido, but can also be found in lowlands and on the coast in the northern part of the distribution range. Among them, the large coastal type is Tobishima daylily H. dumortierii var. exaltata (Stout) Kitam., which is found in the coastal grasslands of Tobishima and Sado in Yamagata Prefecture. The basic variety, Himekanzou H. dumortierii var. dumortierii (narrow dwarf daylily), is a horticultural variety cultivated in Japan, and as its name suggests, is a cute type of daylily that bears two to a few flowers. Unlike daylilies, the double-flowered daylily H. fulva L. var. kwanso Regel (English name: double tawny daylily) (illustration) produces long underground runners, and the single-flowered daylily H. fulva L. var. distiche (Donn.) Hotta are warm temperate species found in Southwest Japan. Some species produce orange-yellow flowers, but most are reddish, with dark, mountain-shaped markings near the base of the perianth.

*Some of the terminology that mentions "narrow dwarf day-lily" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…尾瀬の大群落で有名なゼンテイカ(別名ニッコウキスゲ)H.dumortierii Morren var.esculenta (Koidz.) Kitam.（イラスト）は近畿北部から北海道にかけての高山の湿原を中心に分布するが，分布域の北部では低地や海岸にも見られ，そのなかで大型の海岸型になったものがトビシマカンゾウH.dumortierii var.exaltata (Stout) Kitam.で山形県の飛島や佐渡の海岸草原に分布する。基本変種のヒメカンゾウH.dumortierii var.dumortierii(英名narrow dwarf day‐lily)は日本で栽培されていた園芸品種で，名前のように2～数個の花をつけるかわいらしいカンゾウの1種である。ゼンテイカと異なり地下に長い走出枝を出す八重咲きのヤブカンゾウH.fulva L.var.kwanso Regel(英名double tawny day‐lily)（イラスト）や一重咲きのノカンゾウH.fulva L.var.distiche (Donn.) Hottaは，西南日本に多く分布する暖温帯系の種類で，橙黄色の花をつける系統もあるが，多くは赤っぽく，花被の基部寄りに濃色で山形の斑紋を有している。…

※「narrow dwarf day-lily」について言及している用語解説の一部を掲載しています。

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