Tuesday, 5 October 2010

Hemerocallis flava - 金针/ 萱草/Daylily

Hemerocallis fluva( 金针/ 萱草/ daylily )
Synonym : Hemerocallis citrina
Order : Asparagales | Family : Hemerocallidaceae

The name Hemerocallis derives from Greek words μέρα (hēmera) "day" and καλός (kalos) "beautiful". 

The flower is strictly day-opening.  Opening in the morning and closing in the evening of the same day.

It is native to Asia, from the Caucasus  through the Himalaya to China, Japan and southearstern Russia.  4 varieties may be recognized in China : kwanso, aurantiaca, fluva and angustifolia.

H. fluva is originally a diploid plant.  Most hybrids are tetrapoids.  However, the kwanso variety is a tripoid.  Tripoids and tetrapoids plants cannot seed, they reproduces only by stolons and division.

In the United States and Canada, H. fluva and H fluva longituba has become an invasive species.

The flowers are edible and are used in Chinese cuisine and medicine.  They are sold either fresh or dried.

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