Asarum forbesii - Du Heng

Family:	Aristolochiaceae
Habit:	Perennial
Height:	0.15
Synonyms:
Range:	E. Asia - C. China.

Asarum forbesii (Du Heng) is a Perennial which grows to a height of 0.15m . It has a hardness rating of 0.
Du Heng will flower in October to November. The flowers from this plant are hermaphrodite (has both male and female organs) and they are pollinated by Flies

Soil Information

Du Heng will grow in light (sandy),medium (loamy),hard (clay) soil. It is / is important for the soil to be well drained.
The soil prefers the following PH / acid levels :
- pH of less than 6, Acidic soils
- pH between 6 and 8, Neutral soils
- pH greater than 8, Basic soils
Du Heng prefers moist soils

Ideal Planting Locations

Du Heng can grow in full or semi shaded areas.

Rocky ravines[178].

Planting places suited to this plant described below.

• Grows within a woodland garden
• Works within dappled Shade
• Grows in a shady edge
• Is suited to a deeply shaded location

Cultivation Details

We have very little information on this species and do not know if it will be hardy in Britain, though judging by its native range it should succeed outdoors in many parts of this country. The following notes are based on the general needs of the genus. Prefers a rich moist neutral to acid soil in woodland or a shady position in the rock garden[1, 200]. Plants are hardy to at least -15°c[200]. The flowers are malodorous and are pollinated by flies[200]. Plants often self-sow when growing in a suitable position[200].

Edible Uses*

* See disclaimer
Edible Rating: 0/5
None known

Medicinal Uses*

* See disclaimer
Medicinal Rating: 1/5
The root is used in the treatment of goitre, cough, fever and worms[178, 218]. Continued use of this plant gives the body a fragrant odour[178].

• Anthelmintic - Expels parasites from the gut.
• Antitussive - Prevents or relieves coughing.
• Febrifuge - Reduces fevers.
• Miscellany - Various medicinal actions that need more clarification.

Propagation

Seed - best sown in a cold frame as soon as it is ripe in the summer[134]. Stored seed will require 3 weeks cold stratification and should be sown in late winter[134]. The seed usually germinates in the spring in 1 - 4 or more weeks at 18°c[134]. When large enough to handle, prick the seedlings out into individual pots and grow them on in light shade in the greenhouse for at least their first winter. Plant them out when large enough in late spring. Division in spring or autumn. Plants are slow to increase[200]. It is best to pot the divisions up and keep them in light shade in the greenhouse until they are growing away strongly.

Known Hazards

Although no reports of toxicity have been found for this plant, at least 3 other members of this genus have reports that the leaves are toxic[7, 19]. Some caution is therefore advised in the use of this plant.

Other Uses

None known

Cultivars

no recorded cultivars

References

Flora of China

Author:
Rating: http://flora.huh.harvard.edu/china/
Publisher : On-line version of the Flora - an excellent resource giving basic info on habitat and some uses.
Date of Publication : 1994

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