Twice-Leaved Blackberry

rubus bifrons

The Twice-Leaved Blackberry (Rubus bifrons) is a vigorous, sprawling perennial shrub known for its arching canes and tasty, deep-purple to black fruits. Native to Europe but naturalized in many temperate regions worldwide, this resilient plant thrives in disturbed environments, forming dense, thorny thickets. These thickets provide excellent cover and nesting sites for small birds and mammals, though the plant's aggressive growth can sometimes overwhelm native vegetation. During the warm months, its showy blossoms serve as a rich nectar source for a variety of native pollinators, cementing its role as a key wildlife supporter.

Habitat: Typically found in disturbed sites, forest edges, riparian zones, old fields, and along roadsides in moist, well-drained soils.

Appearance

This robust bramble features stout, arching canes that typically reach lengths of 1 to 6 meters, heavily armed with sharp, backward-curved prickles. Its palmately compound leaves are uniquely two-toned, displaying a smooth, dark green surface on top and a contrasting, felt-like, grayish-white underside. In late spring and summer, it produces clusters of five-petaled flowers ranging from white to light pink, which eventually develop into clusters of glossy, aggregate drupelets that turn black when fully ripe.

KingdomPlantaePhylumTracheophytaClassMagnoliopsidaOrderRosalesFamilyRosaceaeGenusRubus

Twice-Leaved Blackberry

Interesting facts

A single mature thicket of these blackberries can generate thousands of seeds annually, which can remain dormant in the soil for several years waiting for sunlight.

Historically, dense, thorny brambles like this species were purposefully planted around homesteads to serve as organic, impenetrable security fences.

The species name 'bifrons' literally translates to 'two-faced' or 'two-fronted,' describing the starkly contrasting dark green and bright white sides of its leaves.

Special abilities

The dense white hairs on the leaf undersides reflect excess solar radiation and reduce water loss through transpiration during hot days.

When the tips of its long, arching canes touch moist soil, they can quickly generate roots to establish new, independent clonal plants.

Sharp, downward-curving prickles prevent herbivores from easily feeding on the foliage and assist the canes in climbing over surrounding vegetation.

Measurements & details

Length: 100-600 cm
Weight: 1-15 kg
Lifespan: 5-25 years

Diet & Feeding

This plant produces its own organic compounds using sunlight, water, and carbon dioxide through photosynthesis, while absorbing key minerals through its root system.

Primary Foods

Sunlight
Water
Carbon dioxide
Soil nitrogen
Phosphorus

Ecological connections

mutualism

Western Honey Bee

Apis mellifera

The flowers provide an abundant source of nectar and pollen for foraging honey bees in exchange for pollination.

eaten by

American Robin

Turdus migratorius

The ripe blackberries are eaten by robins, which then disperse the seeds throughout the landscape.

parasite

Raspberry Cane Borer

Oberea bimaculata

Larvae of this beetle tunnel into the woody canes, feeding on the pith and weakening the stalks.

Traits

No trait badges are assigned for this object yet.

Also known as

Himalayan Blackberry

Collections

Collections for this object will appear here as more themes are added.

Safety

Danger

1/5 · Very low

No special safety notes yet.

Frequently Asked Questions

How to identify Twice-Leaved Blackberry?

The easiest way to identify Twice-Leaved Blackberry is to use the Snappit nature identifier app.

How long is Twice-Leaved Blackberry?

100-600 cm

How much does Twice-Leaved Blackberry weigh?

1-15 kg

How long does Twice-Leaved Blackberry live?

5-25 years

What does Twice-Leaved Blackberry eat?

This plant produces its own organic compounds using sunlight, water, and carbon dioxide through photosynthesis, while absorbing key minerals through its root system.

Where is Twice-Leaved Blackberry usually found?

Typically found in disturbed sites, forest edges, riparian zones, old fields, and along roadsides in moist, well-drained soils.