Rheum tataricum

Linn. f.

Tartarian rhubarb

Polygonaceae Edible: Leaf stalks, Flowers Potential hazards — see below 494 iNaturalist observations

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Summary

A small hardy perennial rhubarb reaching 0.5 m tall. Hermaphroditic wind-pollinated flowers bloom in May with seeds ripening June to July. Grows in loamy or heavy clay soils with mildly acid to alkaline pH; adapts to both dry and moist conditions and tolerates semi-shade or full sun.

Description

Edible Uses

The leaf stem is cooked and used as a fruit substitute in tarts and similar preparations, lending an acid flavour. The unexpanded flower clusters are also edible, though no further details are recorded.

Medicinal Uses

None known

Known Hazards

Although no specific mention has been seen for this species, the leaves of some if not all members of this genus contain significant quantities of oxalic acid and should not be eaten in any quantity. Oxalic acid can lock up certain minerals in the body, especially calcium, leading to nutritional deficiency. The content of oxalic acid will be reduced if the plant is cooked. People with a tendency to rheumatism, arthritis, gout, kidney stones or hyperacidity should take especial caution if including this plant in their diet since it can aggravate their condition.

Distribution

It is a temperate plant. In western China it grows between 500-1,000 m above sea level.

Where It Grows

Afghanistan, Asia, Central Asia, China, Europe, Kazakhstan, Russia, Tajikistan,

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 at least in the milder areas of the country. This species probably prefers a dry soil. The following notes are based on the general needs of the genus. Prefers a deep, fertile, moderately heavy, humus rich, moisture retentive, well-drained soil in sun or semi-shade. Grows well in heavy clay soils. Plants in this genus seem to be immune to the predations of rabbits. Hybridizes freely with other members of this genus.

Propagation

Seed is best sown in autumn in a shaded cold frame, though spring sowing in a cold frame is also possible. Once seedlings are large enough to handle, prick them out into individual pots and grow them on in a greenhouse or cold frame through their first winter, then plant out in spring. For division, work in early spring or autumn, splitting the rootstock with a sharp spade or knife and ensuring at least one growth bud per division. Larger divisions can go directly into their permanent positions; smaller ones are better potted up and grown on in light shade in a cold frame until well established before planting out in late spring or early summer.