Ribes cereum

Wax currant (Ribes cereum)
Scientific name	Ribes cereum [1]
Common names	wax currant; western red currant
Genus	Ribes [1]
Family	Grossulariaceae [1]
Order	Saxifragales [1]
Habit	shrub under 1.5 m [1]
Fruit	red berries about 6–7 mm wide [1]
Light	sun to part shade [2]
Soil	rocky or gravelly, well-drained soil [2]

Ribes cereum, commonly called wax currant or western red currant, is a small North American shrub with red fruit. Its flowers range from white to pink, and its berries ripen in summer. ^{[1] [2]}

Description

The shrub is under 1.5 m in the Jepson treatment. Its leaves are 1–4 cm wide, shallowly lobed, and spicy-smelling. Short racemes carry three to seven flowers; the flowers are white to pink. The fruit is red and approximately 6–7 mm wide. ^[1]

The species occurs in open, dry or rocky settings. It grows in rocky or gravelly ground, dry ravines, open woodland, ridges, slopes, and dry meadows; the Crater Lake ecotype used for nursery propagation came from open ridges, slopes, and dry meadows. ^{[2] [3]}

Cultivation

Soil and water

Use a sharply drained mineral soil or a well-drained rocky or gravelly loam. A raised or sloping position is a closer match to the species' dry ravine, ridge, slope, and meadow settings than a site that stays wet after irrigation. ^{[2] [3]}

Keep the root zone from remaining persistently saturated. The species' dry ravines, ridges, slopes, and meadows make drainage a stronger site priority than constant moisture. ^{[2] [3]}

Sun and humidity

Ribes cereum is shade-intolerant but is also listed for part shade; the documented ecotype came from open ridges, slopes, and dry meadows. Bright exposure is therefore preferable where the soil drains freely. ^{[2] [3]}

Seasonal changes

Fruit ripens in July–August, and red-ripe fruit was collected in August for nursery propagation. Plan seed collection for late summer and distinguish ripe red berries from earlier green or developing fruit. ^{[2] [3]}

Propagation

Collect fruit when it is red-ripe, then remove the pulp before preparing seed. For a Crater Lake ecotype, a USDA nursery protocol germinated fresh seed after 12 weeks of cold-moist stratification at approximately 34–38 °F. Stored seed from that protocol performed better after 25 weeks under the same general cold-moist treatment. These are protocol-specific observations, not a guaranteed schedule for every seed lot. ^[4]

For another treatment, near-freezing stratification lasted roughly four to five months at about 3–5 °C. The differing durations are a reason to track seed age and treatment rather than assume that one stratification period will suit every lot. ^[2]

The same USDA nursery protocol used October hardwood cuttings treated with 0.8% IBA on a mist bench; they rooted by January. That result supports trying mature wood under comparable propagation conditions, but it does not establish a general rooting percentage or universal timing. ^{[4] [5]}

Flowering, fruiting, and harvest

The short racemes contain three to seven white or pink flowers. Red fruit is about 6–7 mm wide, with ripening in July–August. Harvest ripe red berries in the late-summer window rather than using a calendar date as a fixed rule for every climate. ^{[1] [2]}

Container production followed by hardening and outplanting was documented for a Crater Lake ecotype. The container, hardening, and outplanting observations apply to that ecotype; they do not establish a species-wide age to first fruit or a universal yield. ^[4]

Fruit and uses

Fruit has been used fresh or cooked, dried, or prepared as preserves, sauces, and pies; descriptions of its quality range from insipid or rubbery to highly esteemed. These culinary uses and quality descriptions remain variable observations, not a guarantee of palatability for every plant. ^[6]

Photos

References

• ↑ [1] Ribes cereum — Jepson eFlora treatment.

• ↑ [2] Plant Data Sheet: Ribes cereum, western red currant — University of Washington.

• ↑ [3] Native Plant Network propagation protocol: Ribes (cereum).

• ↑ [4] Trindle and Flessner, Propagation protocol for production of container Ribes cereum plants — USDA NRCS Corvallis Plant Materials Center, 2003.

• ↑ [5] Native Plant Network record of the Ribes cereum container and hardwood-cutting protocol.

• ↑ [6] Ribes cereum — Plants For A Future database.

Image credits

• Ribes cereum 0132.JPG — Walter Siegmund; CC BY-SA 4.0; Wikimedia Commons file page. Caption: Ribes cereum in habitat at Dry Falls State Park, Washington.

• Ribes cereum 9487.JPG — Walter Siegmund; CC BY-SA 4.0; Wikimedia Commons file page. Caption: Ribes cereum in Elinor's Canyon, Washington.