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Josefia intricata Scherber., Wongso & K.Hase

Introduction & Overview

Common and Scientific Names

  • Scientific Name: Josefia intricata Scherber., Wongso & K.Hase
  • Common Name: No common name

Quick Facts

  • Origin: Lowland streambanks in Kalimantan Tengah (Central Borneo)
  • Features: Glossy, lanceolate leaves (5–18 cm) with uniquely raised, complex venation

Taxonomy & Classification

  • Genus: Josefia
  • Botanical Background: Described in Aroideana by Scherberich et al. (2023). Genus honors renowned aroid botanist Josef Bogner; species epithet “intricata” refers to leaf venation complexity

Natural Habitat & Distribution

  • Geographical Range: Known only from Lamandau Regency, Central Kalimantan (Indonesia)
  • Environment: Rheophytic herb on andesite/basalt outcrops along stream edges in perhumid lowland rainforest (~130 m asl)

Morphological Characteristics

Leaves

  • Narrowly lanceolate, coriaceous, dark glossy green above; striking raised adaxial venation network

Inflorescence (Spadix & Spathe)

  • Solitary, nodding spathe white above lime-green base; spadix ~1.6 cm long, pollen extruded in strands; unique paired‑stamen staminate florets

Growth Habit

  • Small (≤20 cm tall) clumping rheophyte with erect stems arising from a creeping rhizome

Cultivation & Care

Light Requirements

  • Bright, indirect light
  • Avoid direct sun

Watering & Humidity

  • Keep substrate evenly moist
  • Maintain ≥80% humidity

Soil & Potting Mix

  • Well‑draining, rich organic aroid mix

Temperature & Fertilizer

  • 20–30 °C; monthly balanced feeding during active growth

Propagation Methods

Division

  • Rhizome division is most reliable


Seeds

  • Fruit produces tiny seeds
  • Germination rarely attempted in cultivation

Common Pests & Diseases

Typical Issues

  • Susceptible to mealybugs, scale, spider mites
  • Inspect regularly

Treatment Recommendations

  • Manual removal of scale
  • Neem oil or insecticidal soap for infestations

Notable Traits & Uses

  • Only species in its genus
  • Splash‑cup seed dispersal
  • Named for Josef Bogner
  • Highly prized by collectors for its rare, intricate foliage and compact form

Conservation & Availability

Wild Population Status

  • Known only from a single locality
  • Formal conservation assessment pending

Market Availability

  • Rare 
  • Occasionally offered by specialty tropical plant nurseries

References & Resources

Further Reading

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