Kaktüs Doktoru logo
Kaktüs Doktoru Logo
0

Hatiora cylindrica

Cylindrical Bone Cactus

Overview

Hatiora cylindrica is an epiphytic cactus species of the Cactaceae family, known for its unique branched structure resembling small bones or jointed bottles. In its native environment, it grows on tree trunks or rocky substrates, utilizing them solely for physical support while drawing moisture from the humid air.

Taxonomy and Naming

This species belongs to the tribe Rhipsalideae within the subfamily Cactoideae 1. The genus name Hatiora is an anagram of Hariot, dedicated to the 16th-century English mathematician and cartographer Thomas Harriot. The specific epithet cylindrica refers to the rounded shape of its vegetative segments.

Distribution and Habitat

Endemic to eastern and southeastern Brazil, this species is found in states like Bahia, Minas Gerais, Rio de Janeiro, and Espírito Santo 2. It is restricted to the moist, subtropical forests of the Atlantic Forest biome (Mata Atlântica). Due to habitat loss and fragmentation, its wild populations are currently threatened.

Appearance

The plant consists of segmented, cylindrical, green stems that branch dichotomously. The segments lack sharp spines, featuring only tiny bristles on their areoles. In spring, terminal yellow or deep orange flowers emerge from the apical areoles, creating a stunning visual display 3.

Cultivation and Care

Unlike desert cacti, Hatiora cylindrica requires a shaded environment with high ambient humidity. It thrives in porous, well-aerated media such as a mixture of peat, pine bark, and perlite. Regular watering is necessary during active growth, preventing the medium from drying out completely.

Common Mistakes

The most frequent error is treating it like a desert succulent. Over-watering in heavy soil causes immediate root rot, while extended droughts lead to joint drop and shriveling.

References

  1. Barthlott, W. (1987). New names in Rhipsalideae (Cactaceae). Bradleya, 5, 97-100. ↩
  2. Taylor, N.P. & Zappi, D.C. (2004). Cacti of Eastern Brazil. Royal Botanic Gardens, Kew. ↩
  3. Hunt, D. (2006). The New Cactus Lexicon. DH Books. ↩
Light

Bright Indirect Light

Thrives in bright, filtered indirect sunlight. Avoid direct, scorching afternoon sun.

Watering

5-14 Days

Keep the soil evenly moist but never waterlogged. Reduce watering in winter.

Soil

Lightweight, well-draining, organic-rich epiphytic cactus mix containing pine bark and perlite.

Requires an acidic, coarse, well-draining epiphytic or orchid-potting mix.

Safety

Pet Friendly

Non-toxic to cats, dogs, and humans. Safe for household cultivation.

Difficulty

Moderate

Moderate care; requires a balance between adequate moisture and perfect drainage.

Native Habitat

Brazil (East and Southeast)

Native to the coastal Atlantic Forest biome of Brazil, where it grows as an epiphyte on trees, benefiting from the rich organic debris, warm temperatures, and high moisture levels of the jungle canopy.

Frequently Asked Questions

Is Hatiora cylindrica toxic?
No, this plant is entirely **non-toxic** to pets (cats and dogs) and humans.
How often should I water Hatiora cylindrica?
Water roughly every 5 days in summer once the topsoil starts drying, and reduce to once every 10-14 days during winter.
Why are the stem segments falling off?
Segment dropping is typically caused by root stress due to overwatering, poor drainage, or extreme drought.
What is the best soil mix?
A loose epiphytic mix is best. A blend of orchid bark, perlite, and a small amount of peat moss works perfectly.
How do I get Hatiora cylindrica to bloom?
Exposing the plant to cooler temperatures (12-15°C) and reduced watering during autumn and winter stimulates flower bud development.
Can it tolerate direct sunlight?
No, direct sunlight can bleach and burn the stems. It prefers filtered bright light or partial shade.
What is its growth rate?
It has a moderate growth rate, producing new segments quickly during the spring and summer when humidity and nutrients are optimal.
How is it propagated?
Stem cuttings taken at the joints can be easily rooted in moist perlite or potting mix after letting the cut ends dry for a few days.
What temperatures are suitable for the plant?
It thrives best between 18-25°C. In winter, avoid letting temperatures drop below 10°C.
When should I repot it?
Repot in spring every 2-3 years, or only when the plant becomes root-bound, as it prefers slightly tight pots.