Rhipsalis occidentalis

Humid forests of western South America and Suriname

Rhipsalis occidentalis has a disjunct recorded range in southern Ecuador, northern Peru and Suriname. It grows as an epiphytic cactus in humid to perhumid tropical forest.

Filtered light, warm humid air and regular wetting are balanced by airflow and rapid drainage around roots anchored to bark or small organic pockets. Indoors, use a loose potting mix, water regularly and let air return around the roots before the next drink.

How to care for Rhipsalis occidentalis

Bright shade for thin flattened stems

Provide bright, filtered light or gentle early sun. The thin dark-green segments suit humid forest shade and can scorch quickly against hot glass.

Even moisture with full drainage

Water when the upper layer has begun to dry, keeping the deeper root zone lightly moist during active growth. Drain thoroughly because a perhumid habitat does not mean the roots tolerate stagnant compost.

Bark-rich compost and a broad hanger

Use an open epiphyte mix in a hanging pot with a clear drainage hole. Wider supports reduce pressure on the few older stems that eventually carry much of the canopy.

Warm humid air with ventilation

Maintain mild to warm conditions and moderate to high humidity with gentle air movement. Feed at low strength during new growth and reduce water and feeding when the plant slows.

Protect the supporting stems

Keep older flattened branches from kinking over the pot rim. Guide new flexible growth before it becomes long and weight-bearing.

When Rhipsalis occidentalis is unhappy

Thin flattened segments curl at the margins

This wet-forest species reacts quickly to a dry root ball, hot glass or abruptly dry air. Restore even moisture without leaving the mix saturated and move the plant away from heat.

The lower stems become translucent or yellow

The roots are staying wet without enough air. Remove soft tissue, open the mix and make sure the hanger drains completely after watering.

New segments remain unusually small

Check root firmness and filtered light before changing the feeding rate. Declining roots and deep shade both restrict the size of new flattened growth.

An older supporting branch creases at the pot rim

The few main branches eventually carry much of the canopy and can kink under its weight. Widen the support point and guide young flexible growth before it becomes load-bearing.

Scale or mealybugs hide beneath notched segments

Inspect the undersides, shallow notches and older branch junctions. Isolate the plant and repeat control without scraping the thin stem surface.

Rhipsalis occidentalis is non-toxic to cats and dogs

• This plant is non-toxic to cats and dogs.
• Its effects on people are unclear, so keep it away from young children who may chew it.
• Eating a large amount can still cause an upset stomach. Seek medical or veterinary advice if symptoms continue.

The meaning and history of Rhipsalis occidentalis

Rhipsalis comes from Greek rhips, wickerwork or basket weave. Occidentalis means western, referring to this species’ Andean distribution west of the main eastern Brazilian centre of similar flat-stemmed species.

Joseph Gaertner established the genus Rhipsalis in 1788 in De Fructibus et Seminibus Plantarum, volume 1, page 137.

Wilhelm A. Barthlott and Werner Rauh first described Rhipsalis occidentalis in 1987 in Kakteen und andere Sukkulenten, volume 38, page 17.