Anthurium moonenii

A lowland climber from French Guiana

Anthurium moonenii was discovered by Joep Moonen and described from lowland French Guiana, with collections from roughly 0–150 m and an additional record from Amazonas, Brazil. It climbs closely against trees as an epiphyte or hemi-epiphyte in warm wet forest. Its roots spread along humid bark beneath dense tropical cover.

Care for Anthurium moonenii

• Light: Place in bright shade or well-filtered light. Shield the climbing foliage from direct midday sun and heat behind glass.
• Watering: Keep the root zone evenly moist, allowing only the surface to begin drying. Water the support sparingly where active aerial roots have attached.
• Humidity and airflow: Provide 70–85% relative humidity with gentle airflow around the stem and support.
• Temperature: Maintain 22–29 °C with nights above 20 °C. Lowland growth slows quickly in a cold root zone.
• Substrate and repotting: Allow Anthurium moonenii to establish a clear watering pattern in the supplied root ball, with the climbing stem and attached roots remaining firm and active; repot after the plant is stable and the next phase of root growth has begun. Later, use a heavy, close-fitting base pot with bark, coco husk, coir and pumice and add a moisture-holding pole or plank.
• Feeding: Use a weak complete fertiliser during continuous warm growth. Flush the pot and support with low-mineral water every 4–6 weeks.
• Climbing trilobed growth and propagation: Attach the epiphytic stem to a slim mossed pole or plank and leave room for mature three-part leaves. Wipe each mature lobe gently and propagate from a node-bearing stem section with an active aerial root.

Stalled growth, root stress and pests

• Yellowing linked to moisture: When the three-part leaves soften and the pot and support are dry, soak the root zone and moisten attached roots. Soft yellow growth while the base remains heavy points to poor aeration; stop the routine and look closely at the lower stem.
• Firm roots versus hollow roots: Keep firm roots at the base and along nodes fixed to the support. Remove hollow or slippery sections using a blade cleaned before every cut, use a snug coarse mix, keep the ties loose and secure new aerial roots before the mature leaves add weight. Before cutting Anthurium moonenii, photograph the root system and confirm failure by texture; preserve every firm section, sterilise the tool between cuts and keep the crown stable while new roots develop.
• Brown margins after a dry cycle: Brown tips may record a dry support, salt accumulation or cold damage to aerial roots. Check base and support separately, flush the pot and maintain moisture only where live roots are attached.
• A dark patch that changes size: Dry rubbing marks can show a stable daily outline where leaves touch a support. Wet, yellow-edged or expanding lesions require isolation, dry foliage and daily photographs.
• A smaller next leaf: Long bare stem sections, smaller divided leaves or a leaning tip indicate weak light or poor support contact. Maintain bright filtered light and 22–29 °C, then retie the stem loosely and guide active roots into place.
• Pest marks on opening foliage: Thrips scar new leaf sections; scale and mealybugs settle at the central leaf joint, nodes and ties. Inspect each section and the support. Isolate, remove visible pests, treat every hiding place with a labelled product and follow the repeat interval while checking weekly for four weeks.
• Heavy leaves pulling at the stem: Mature three-part leaves add weight and leverage to the stem. Check ties and the support after each new leaf, and stabilise the pot before it begins leaning.

Anthurium moonenii and pet safety

• Not pet-safe. This plant contains calcium oxalate crystals that can cause immediate pain and irritation if chewed.

The name Anthurium moonenii

The genus name Anthurium combines Greek anthos, “flower”, and oura, “tail”, referring to the tail-like spadix. Heinrich Wilhelm Schott established the genus in 1829 in Wiener Zeitschrift für Kunst, Litteratur, Theater und Mode, volume 3, page 828.

Moonenii honours naturalist Joep Moonen, who discovered the species in French Guiana. Thomas B. Croat and Eduardo G. Gonçalves described Anthurium moonenii in 2005 in Willdenowia 35: 173.