This species and Arisaema consanguineum Schott are closely related and botanits disagree on the boundaries between them. In some treatments, Arisaema erubescens is restricted to Nepal and all other occurrences are treated as Arisaema consanguineum. In others Arisaema consanguineum is treated as a synonym of Arisaema erubescens. We are following the treatment in the Kew 'World Checklist of Selected Plant Families, which treats the two species as distinct with Arisaema erubescens only found in Nepal[]. This does mean that the medicinal uses recorded here from the Flora of China[] may actually refer more properly to Arisaema consanguineum, though the species are so similar that the uses probably apply equally to both[].

Common Name:

General Information

Arisaema erubescens is a herbaceous perennial plant growing from a tuber that is usually renewed seasonally. The plant produces a usually solitary leaf up to 100cm tall and a flowering stem up to 75cm tall. The tuber also produces some tubercles around its base - these become separated from the old tuber at the end of the season, growing on in subsequent years to form new plants[].
The plants are harvested from the wild for local use as a medicine.

Known Hazards

None known

Botanical References

Range

E. Asia - Nepal

Habitat

Pinus forests, mixed forests, thickets, grassy slopes, lakesides, between rocks; at elevations up to 3,200 metres[].

Properties

Medicinal Rating
Habit	Perennial
Height	0.00 m
Pollinators	Insects
Cultivation Status	Wild

Cultivation Details

Species in this genus generally prefer a cool moist peaty soil in the bog, woodland garden or a sheltered border in semi-shade[, ]. They prefer a loamy or peaty soil[] and will tolerate a sunny position if the soil is moist but not water-logged and the position is not too exposed[, ].
Only plant out full sized tubers and mulch them with organic matter in the winter[]. Plants need protection from slugs[].
The plant is paradioecious. The sex depends on nutrition and is therefore variable from one year to another[]. Smaller plants produce only staminate flowers, whilst larger plants produce either staminate and pistillate flowers simultaneously or pistillate flowers only. Changes in gender expression are directly correlated with size and are also influenced by the environment in which the plants are growing. Reversions in phenotypic gender have been experimentally induced by such factors as removing leaf area or changing soil nutrient levels[].

Edible Uses

The tubers of several species in this genus are recorded as being edible after treatment. We have no specific information for this species, but the depressed-globose tuber is 2 - 7cm in diameter[, ].

Medicinal

The tubers are used to treat coughs, epilepsy, and tetanus[].

Other Uses

None known

Propagation

Seed - best sown as soon as it is ripe in a shady position in a cold frame[]. Stored seed remains viable for at least a year and can be sown in spring in the greenhouse but it will probably require a period of cold stratification. Germination usually takes place in 1 - 6 months at 15°c[]. 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 a coupe of years until the corms are more than 20mm in diameter. Plant out into their permanent positions whilst they are dormant.
Division of tubers when the plant dies down in late summer.