Common Name:

General Information

Rosa laxa is an erect, prickly, deciduous shrub with slender, arching stems; it can grow from 100 - 250cm tall. The prickles are rather sparse on the stems, but are large and strong[].
The plant is harvested from the wild for local use as a food and medicine

Known Hazards

There is a layer of hairs around the seeds just beneath the flesh of the fruit. These hairs can cause irritation to the mouth and digestive tract if ingested.

Botanical References

, ,

Range

Temperate Asia - western Siberia, Kazakhstan, Kirgizstan, Mongolia, western China ( Xinjiang)

Habitat

Steppe meadows, forest edges and river banks[]. Populus forests, scrub, valleys, damp grassy places, river and stream sides; at elevations from 500 - 1,500 metres[].

Properties

Edibility Rating
Medicinal Rating
Habit	Deciduous Shrub
Height	2.50 m
Pollinators	Bees
Cultivation Status	Wild

Cultivation Details

Rosa laxa is a moderately cold-hardy plant, being able to tolerate temperatures down to around -30°c when fully dormant[].
Most Rosa species require a sunny position if they are to flourish and flower well. They prefer a circumneutral pH, succeeding in a range of soil texturess so long as they are moist but well-drained[, ].
Rose species will often hybridize freely with other members of the genus[].
Plants in this genus are notably susceptible to honey fungus[].

Edible Uses

Fruit - raw or cooked. It is rich in vitamin C, containing up to 4.15% by dry weight[]. Some forms contain up to 10%[]. The red, oblong to ovoid fruit is about 10 - 18mm in diameter[], but there is only a thin layer of flesh surrounding the many seeds[]. Some care has to be taken when eating this fruit, see the notes above on known hazards.

The seed of roses is generally a good source of vitamin E, it can be ground and mixed with flour or added to other foods as a supplement[, ]. Be sure to remove the seed hairs[].

Medicinal

The fruit of many members of this genus is a very rich source of vitamins and minerals, especially in vitamins A, C and E, flavanoids and other bio-active compounds. It is also a fairly good source of essential fatty acids, which is fairly unusual for a fruit. It is being investigated as a food that is capable of reducing the incidence of cancer and also as a means of halting or reversing the growth of cancers[].

Agroforestry Uses:

Rose species in general grow well with alliums, parsley, mignonette and lupins[, ]. Garlic planted nearby can help protect the plant from disease and insect predation[, ]. Roses often grow badly with boxwood[].

Other Uses

None known

Propagation

Seed. Rose seed often takes two years to germinate. This is because it may need a warm spell of weather after a cold spell in order to mature the embryo and reduce the seedcoat[]. One possible way to reduce this time is to scarify the seed and then place it for 2 - 3 weeks in damp peat at a temperature of 27 - 32°c (by which time the seed should have imbibed). It is then kept at 3°c for the next 4 months by which time it should be starting to germinate[]. Alternatively, it is possible that seed harvested 'green' (when it is fully developed but before it has dried on the plant) and sown immediately will germinate in the late winter. This method has not as yet(1988) been fully tested[]. Seed sown as soon as it is ripe in a cold frame sometimes germinates in spring though it may take 18 months. Stored seed can be sown as early in the year as possible and stratified for 6 weeks at 5°c[]. It may take 2 years to germinate[]. Prick out the seedlings into individual pots when they are large enough to handle. Plant out in the summer if the plants are more than 25cm tall, otherwise grow on in a cold frame for the winter and plant out in late spring.
Cuttings of half-ripe wood with a heel, July in a shaded frame. Overwinter the plants in the frame and plant out in late spring[]. High percentage[].
Cuttings of mature wood of the current seasons growth. Select pencil thick shoots in early autumn that are about 20 - 25cm long and plant them in a sheltered position outdoors or in a cold frame[, ]. The cuttings can take 12 months to establish but a high percentage of them normally succeed[].
Division of suckers in the dormant season. Plant them out direct into their permanent positions.
Layering. Takes 12 months[].