Day-lily flower

Day-lily flower (Hemerocallis spp.) is an important vegetable in the Orient in either fresh or dried style. The fresh day-lily flower is always harvested before reaching full-bloom, as fully bloomed flowers lose their market value. Therefore, harvested flowers must be sold within two days otherwise they bloom. The dried flowers are also available in the oriental market. The problems associated with the dried product include microbial contamination and insect infestation. 

Irradiation with a dose above 2 kGy inhibits the blooming of day-lily flowers. After irradiation above 2 kGy damage was detected with scanning microscope examination in the cells of the petal, sepal and receptacle of the lily flowers. With 5 kGy irradiation the appearance of the flowers was seriously injured and the flowers became pale and then dropped. Irradiation at a dose of 0.5 or 1 kGy did not injure the flower appearance and could not inhibit the blooming of the flowers (Yang, 1994). 

The dried day-lily flowers contained volatile components including ethyl formate, ethyl acetate, nonanol, 3-methylbutanol, isoamyl alcohol, methylpyrazine, 2,6-di-methylpyrazine, furfural, acetic acid, terpinolene, furfuryl formate, furfuryl acetate, phenylacetaldehyde and furfuryl alcohol. A low dose (0.5 kGy) of irradiation could control mold contamination and insect infestation in dried day-lily flowers. No significant difference in the volatile compositions between the irradiated (0.5, 1.0, 2.0 and 5.0 kGy) and unirradiated dried day-lily flowers were found. However, the quality of dried day-lily flowers was acceptable after irradiation (at 0.5 kGy) (Yang, 1994). 

Day lily flower Amylase and ascorbic acid oxidase activity 11.5% [3]... 

Other workers who report an increase in the uptake of in tomato, cucumber, soybean, mungbean, tobacco and day lily flower in response to the application of rare earths (Ning 1985, Wu et al. 1984, 1985). Other reports (Leonard et al. 1975, Ueki 1979) confirm that La stimulates P uptake, possibly by the release of phosphatases into the soil medium. 

You could infer from this passage that these flowers are called day-lilies because... 

By some miracle, the cookie that he had not tasted since childhood had the ability to conjure his early days in a town he calls Combray, the old house where his aunt used to live, the water-lilies of the Vivonne, the garden flowers, the country roads, the church, the good folk of the village and their little dwellings. Proust wrote that visions took form and solidity as they emerged—city and gardens—from his cup of tea. 

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