Light
Bright Indirect Light
Requires bright, indirect or filtered sunlight. Direct harsh sun can scorch the delicate stems.
Reference image Lymanbensonia crenata
Crenate Lymanbensonia
Overview
Lymanbensonia crenata is a rare, epiphytic cactus species belonging to the family Cactaceae 1. Unlike typical desert cacti, it has adapted to life in humid, shaded forest canopies where it grows on tree trunks and branches.
Taxonomy and Naming
The genus name Lymanbensonia honors the eminent American botanist Lyman Benson. The specific epithet crenata refers to the scalloped or crenate margins of its flattened stems 2. In older literature, this species has been classified under Pfeiffera or Lepismium.
Distribution and Habitat
This species is native to Western South America, particularly Bolivia, where it occurs in seasonally dry tropical forests and Yungas montane forests 1. It grows as an epiphyte or lithophyte, benefiting from high atmospheric humidity during the wet season.
Appearance
It features pendulous or semi-erect, flattened, green stems with distinct wavy (crenate) edges. The areoles are small and carry minimal to no significant spines. During the blooming season, it produces delicate, bell-shaped flowers of a creamy white or pale pink color along the stem margins 2.
Cultivation
It thrives in bright, filtered indirect light and requires an airy, moisture-retaining but fast-draining potting medium. A mix of orchid bark, perlite, and peat moss mimics its natural epiphytic habitat. The soil should be kept moderately moist but never waterlogged 2.
Common Cultivation Mistakes
Using heavy, compacted soil leads to rapid root rot. Overwatering and leaving water in the drip tray are the primary causes of failure. Insufficient ambient humidity can also lead to bud drop.
Bibliography
References
Watering
7-20 Days
Water when the top inch of soil dries out. Do not allow the root zone to sit in stagnant water.
Soil
Well-drained, organic-rich epiphytic cactus mix containing perlite and orchid bark
An open, organic-rich epiphytic mix with orchid bark, peat, and coarse perlite is best.
Safety
Pet Friendly
Non-toxic to humans and domestic pets, making it a safe choice for home interiors.
Difficulty
Moderate
Moderate. Easy if treated like a Christmas cactus, but susceptible to rot in heavy soils.
Native Habitat
Bolivia, Western South America
Native to the Andean slopes of Bolivia, where it populates seasonally dry tropical montane forests, growing high up in tree canopies as an epiphytic survivor.
Frequently Asked Questions
Is Lymanbensonia crenata toxic to pets?
No, this epiphytic cactus species is completely non-toxic and safe for domestic pets like cats and dogs.
How often should I water it?
Water roughly once a week in summer when the topsoil dries out, and reduce to once or twice a month during winter.
Does it need direct sunlight?
No, harsh direct sunlight can scorch its leaf-like stems. Bright, filtered indirect light is ideal.
What type of soil should I use?
An airy, well-draining, and organic-rich mix is required. You can mix standard cactus soil with plenty of orchid bark and perlite.
When should I repot this plant?
Repot in spring, generally every 2-3 years, or when the roots have completely filled the current pot.
How do I encourage Lymanbensonia crenata to bloom?
Keeping the plant in a cool room (around 12-15°C) and reducing water during winter will stimulate spring bud formation.
What is its growth rate?
It is a moderate grower, developing pendulous stems relatively quickly when provided with proper humidity and warmth.
Is it a difficult plant to grow indoors?
It is moderately easy. It should be treated more like an orchid or a Christmas cactus rather than a traditional desert cactus.
Why are the stems getting soft and yellow?
This is usually a sign of root rot due to overwatering. Stop watering immediately and check the root system.
Is it normal for it to grow aerial roots?
Yes, being an epiphytic species, it naturally produces aerial roots to absorb moisture from the air and anchor itself.