Asarum forbesii

• Du Heng

Notes

Cultivation

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^[4][5]. Plants are hardy to at least -15°c^[5]. The flowers are malodorous and are pollinated by flies^[5]. Plants often self-sow when growing in a suitable position^[5].

Propagation

Seed - best sown in a cold frame as soon as it is ripe in the summer^[6]. Stored seed will require 3 weeks cold stratification and should be sown in late winter^[6]. The seed usually germinates in the spring in 1 - 4 or more weeks at 18°c^[6]. 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^[5]. It is best to pot the divisions up and keep them in light shade in the greenhouse until they are growing away strongly.

Range

E. Asia - C. China.

Habitat

Rocky ravines^[1]. Moist shady places in forests in valleys at elevations under under 800 metres^[3].

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][8]. Some caution is therefore advised in the use of this plant.

Edible uses

None known

Material uses

None known

Medicinal uses

The root is used in the treatment of goitre, cough, fever and worms^[1][2]. Continued use of this plant gives the body a fragrant odour^[1].