Rubus glandicaulis

Blanchard

Rosaceae Edible: Fruit 37 iNaturalist observations

Has a deadly poisonous lookalike — see comparison below

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Summary

Rubus glandicaulis is a North American species of flowering plant in the rose family. It is native to eastern and central Canada (Québec, Ontario, and the 3 Maritime Provinces) and the northeastern and north-central United States (Wisconsin, Michigan, New York, Massachusetts, Vermont, New Hampshire, Maine). Rubus glandicaulis is an erect shrub with perennial roots and hairy and prickly biennial shoots up to 6 feet (180 cm) tall. Leaves have 3 or 5 leaflets. The genetics of Rubus is extremely complex, so that it is difficult to decide on which groups should be recognized as species. There are many rare species with limited ranges such as this. Further study is suggested to clarify the taxonomy.

Description

A deciduous shrub reaching 1.8 m tall. Hermaphroditic flowers are pollinated by insects. Tolerates light sandy, medium loamy, and heavy clay soils with good drainage. Grows in mildly acidic to basic pH ranges. Suitable for semi-shaded woodland conditions or full sun. Prefers consistently moist soil.

Edible Uses

The fruit can be eaten raw or cooked.

Medicinal Uses

None known.

Distribution

It is a temperate plant.

Where It Grows

Canada, North America, USA,

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 the country. The following notes are based on the general needs of the genus. Easily grown in a good well-drained loamy soil in sun or semi-shade. Plants in this genus are notably susceptible to honey fungus.

Propagation

Seed requires stratification and is best sown in early autumn in a cold frame. Stored seed needs one month stratification at about 3°c and should be sown as early in the year as possible. Prick out seedlings when large enough to handle and grow on in a cold frame, then plant out into permanent positions in late spring of the following year. Cuttings of half-ripe wood can be taken in July/August in a frame. Tip layering in July, planting out in autumn. Division can be done in early spring or just before leaf-fall in autumn.