Hemerocallis dumortieri is closely related to Hemerocallis middendorffii, which has been treated by some authors as a variety of Hemerocallis dumortieri[
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.
Hemerocalis sieboldii Baker
Hemerocallis rutilans Baker
Hemerocallis dumortieri is a herbaceous perennial plant forming a tight cluster of stems 25 - 50cm tall. The roots are slightly fleshy, with an oblong, swollen, tuberous part near the tip
The plant is harvested from the wild for local use as a food, medicine and source of materials. It is grown as an ornamental in gardens.
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 - Korea, ?northeast China. Introduced in Japan.
Meadows in the mountains of N. and C. Japan[
This species is hardy to about -20°c[
Succeeds in most soils[
], including dry ones, preferring a rich moist soil[
]. 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[
Hybridizes freely with other members of this genus[
Individual flowers only live for one day[
]. The flowers are sweetly scented[
Plants form a tight clump that spreads slowly[
]. The roots are cylindrical[
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 are crisp and juicy with a pleasant sweetness and no unpleasant after-taste[
]. They can be dried and used as a thickener in soups etc[
]. The flower buds contain about 43mg vitamin C per 100g, 983 IU vitamin A and 3.1% protein[
Root - 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[
Plants form a slowly spreading clump and are suitable for ground cover when spaced about 45cm apart each way[
]. The dead leaves should be left on the ground in the winter to ensure effective cover[
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.