This species is treated as a synonym of Hemerocallis citrina in some works, such as the Flora of China[
Hemerocallis is a very difficult genus taxonomically, with no overall concensus amongst botanists as to how many distinct species there are and the delineation between them. The genus as a whole needs a comprehensive revision. We are trying to follow the most recent thinking for each species, though it is inevitable that a number of species we have included in the genus will have to be amended as and when a comprehensive new treatment is published.
Hemerocallis flava coreana (Nakai) M.Hotta
Hemerocallis coreana is a perennial plant that can grow up to 0.40 metres tall.
The plant is harvested from the wild for local use as a food, medicine and source of materials.
Large quantities of the leaves are said to be hallucinogenic. Blanching the leaves removes this hallucinatory component[
]. (This report does not make clear what it means by blanching, it could be excluding light from the growing shoots or immersing in boiling water[
E. Asia - eastern China (Shandong), southern Japan, southwestern Korea.
Forest margins, grassy fields and slopes along valleys, from near sea level to 2000 metres[
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Succeeds in most soils[
], including dry ones, preferring a rich moist soil and a sunny position[
]. Grows well in heavy clay soils. Succeeding in sun or shade, it produces more flowers in a sunny position though these flowers can be shorter-lived in very sunny positions[
]. Succeeds in short grass if the soil is moist[
]. Prefers a pH between 6 and 7[
According to the Flora of China, this species is no more than a synonym for H. citrina[
]. It is, however, seen as a distinct species in other treatments and so is maintained here as a separate species[
This species has not yet been grown in Europe (1994) so its hardiness is not known[
Hybridizes freely with other members of this genus[
Individual flowers only live for one day, however there are 50 - 80 flowers produced on each scape[
Plants take a year or two to become established after being moved[
Plants seem to be immune to the predations of rabbits[
The plants are very susceptible to slug and snail damage, the young growth in spring is especially at risk[
Leaves and young shoots - cooked[
]. They must be consumed when very young or else they become fibrous[
Flowers and flower buds - raw or cooked[
]. The flowers can be up to 12cm long[
]. The flower buds contain about 43mg vitamin C per 100g, 983 IU vitamin A and 3.1% protein[
If this species has swollen roots then they can be eaten raw or cooked.
The juice of the roots is an effective antidote in cases of arsenic poisoning[
A tea made from the boiled roots is used as a diuretic[
The tough dried foliage is plaited into cord and used for making footwear[
Seed - sow in the middle of spring in a greenhouse. Germination is usually fairly rapid and good. Prick out the seedlings into individual pots when they are large enough to handle. Grow the plants on for their first winter in a greenhouse and plant out in late spring[
Division in spring or after flowering in late summer or autumn[
]. Division is very quick and easy, succeeding at almost any time of the year[
]. Larger clumps can be replanted direct into their permanent positions, though it is best to pot up smaller clumps and grow them on in a cold frame until they are rooting well. Plant them out in the spring.