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Hemerocallis fulva
''Hemerocallis fulva'', the Orange Day-lily, Tawny Daylily, Tiger Daylily, Fulvous Daylily or Ditch Lily (also Railroad Daylily, Roadside Daylily, Outhouse Lily, Tiger Lily, and Wash-house Lily), is a species of daylily native to Asia. It is very widely grown as an ornamental plant in temperate climates for its showy flowers and ease of cultivation. It is not related to true lilies, but gets its name from the similarity of the flowers and from the fact that each flower lasts only one day.
==Biology==
It is an herbaceous perennial plant growing from tuberous roots, with stems 40–150 cm tall. The leaves are linear, 50–90 cm long and 1–2.8 cm broad. The flowers are 5–12 cm across, orange-red, with a pale central line; they are produced from early summer to late autumn on spikes of 10–20, with the individual flowers opening successively, each one only lasting one day. The fruit is a three-valved capsule 2–2.5 cm long and 1.2–1.5 cm broad which splits open at maturity to release the seeds.〔〔
Both diploid and triploid forms are known in the wild, but most cultivated plants are sterile triploids which only reproduce vegetatively by stolons or division. At least four botanical varieties are recognized, including the typical triploid var. ''fulva'', the diploid, long-flowered var. ''angustifolia'' (syn.: var. ''longituba''), the triploid var. ''kwanzo'', where the stamens are modified into additional petals, and the evergreen var. ''aurantiaca''.〔
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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