Philodendron cf. lupinum – Velvet-Leaf Climber with Evolving Foliage

From Deep Maroon Undersides to Glossy Mature Leaves
Philodendron cf. lupinum, informally known as Philodendron vanninii Croat (ined.), is a rare hemiepiphytic species from the Amazon Basin. Its juvenile leaves are velvety, heart-shaped, and deeply maroon underneath. As the plant matures, foliage transitions into larger, obovate-hastate shapes with glossy green tops and matte lower surfaces. This tropical climber thrives indoors with high humidity, bright indirect light, and vertical support.
What Makes Philodendron cf. lupinum Special
 
Velvety Juvenile Foliage: Deep green upper surfaces and striking maroon undersides
 
Leaf Evolution: Mature leaves become longer, glossier, and develop pronounced veins
 
Growth Habit: Hemiepiphytic climber that appreciates moss poles or trellises indoors
Origin and Botanical Context
 
Native Range: Amazonian lowland forests in Brazil (Acre), Colombia (Amazonas), and Peru (Loreto)
 
Elevation: Typically found at 110–120 m above sea level
 
Collection History: Collected by botanists including T.B. Croat and J.J. Pipoly III in the late 20th century
 
Taxonomic Status: Not formally published; resembles Philodendron lupinum, potentially a distinct species
 
Toxicity: Contains calcium oxalate crystals; toxic to pets and humans if ingested
Philodendron cf. lupinum – Indoor Care Guide
 
Light: Provide bright, indirect light for 10–12 hours per day
 
Watering: Let the top 2–3 cm of substrate dry before watering again
 
Humidity: Maintain 60–80%; use a humidifier or group with other tropical plants
 
Temperature: Ideal range is 18–27 °C; avoid cold drafts or dips below 12 °C
 
Soil: Use a chunky mix of orchid bark, perlite, coconut coir, and charcoal
 
Potting: Choose a breathable container with drainage holes; terracotta works well
 
Fertilizing: Feed monthly with a balanced liquid fertilizer when actively growing
 
Support: Use a moss pole or trellis to encourage larger leaves and vertical growth
Leaf Growth and Transformation
 
Juvenile Size: 5–10 cm velvety leaves with maroon undersides
 
Mature Size: Up to 25–30 cm with upright support and stable humidity
 
Growth Rate: Moderate under consistent warmth and lighting
Propagation and Hydroponics
 
Method: Propagate via stem cuttings with visible nodes
 
Medium: Root in sphagnum moss, water, or semi-hydroponics
 
Hydro Suitability: Performs well in LECA with steady humidity and nutrients
Common Problems and Solutions
 
Yellow Leaves: Usually due to overwatering or nutrient deficiency
 
Brown Leaf Tips: Caused by dry air or erratic watering
 
Pests: Check for spider mites and mealybugs; treat early with insecticidal soap or neem oil
 
Stuck Leaves: Raise humidity and provide airflow to ease unfurling
 
Fungus Gnats: Allow the top layer of soil to dry and use sticky traps
Styling Tips and Plant Companions
 
Best Placement: Shelves, plant ladders, or beside other tropicals
 
Pot Style: Neutral or textured ceramics to complement its velvety foliage
 
Great Pairings: Calatheas, Anthuriums, and Monsteras with similar humidity needs
Etymology and Taxonomic Notes
The genus name Philodendron comes from Greek “philo” (love) and “dendron” (tree), describing its tree-hugging habit. The “cf.” prefix means “confer,” indicating the plant resembles Philodendron lupinum but may represent an unpublished species. The Latin “lupinum” means “wolf-like,” possibly referring to its bold, textural foliage.
Frequently Asked Questions
 
Can Philodendron cf. lupinum be grown in LECA?Yes — it adapts well to semi-hydro setups with stable nutrients and high humidity
 
Do the maroon undersides fade?Some fading may occur as leaves mature; maintain bright indirect light to preserve color
 
Is it pet-safe?No — like most aroids, it is toxic if ingested by pets or humans
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