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Anthurium obtusum (Engl.) Grayum

Introduction & Overview

Common and Scientific Names

  • Scientific Name: Anthurium obtusum (Engl.) Grayum
  • Common Name: Obtuse anthurium

Quick Facts

  • Origin: Native to tropical South America
  • Features: Distinctive, large, glossy leaves and a modest inflorescence; it thrives in humid, shaded forest understories and is admired for its elegant foliage

Taxonomy & Classification

  • Genus: Anthurium
  • Botanical Background: Has been studied by botanists interested in the evolutionary trends within tropical aroids; its classification reflects ongoing research and debate within the botanical community.

Natural Habitat & Distribution

  • Geographical Range: Native to tropical regions of South America, particularly in areas with rich, humid rainforests, Anthurium obtusum is found in regions that offer a stable, warm climate.
  • Environment: High-humidity conditions with well-drained, organic-rich soils; the species favors dappled light under forest canopies and a consistently warm temperature range.

Morphological Characteristics

Leaves

  • Broad, elliptical leaves that are thick and glossy 
  • Deep green coloration

Inflorescence (Spadix & Spathe)

  • Inflorescence is modest compared to other Anthurium species
  • Spathe typically displays a subtle hue,
  • Spadix remains inconspicuous

Growth Habit

  • Terrestrial growth habit
  •  With a rhizomatous base
  • Forms clumps that can spread gradually

Cultivation & Care

Light Requirements

  • Bright, indirect light
  • Direct sunlight should be avoided to prevent leaf burn

Watering & Humidity

  • Regular watering is essential
  • High humidity
  • Allow the top layer of soil to dry between waterings

Soil & Potting Mix

  • A well-draining, peat-based mix enriched with organic matter
  • Containers with drainage holes

Temperature & Fertilizer

  • Temperature range between 65°F and 80°F
  • Fertilize lightly during the growing season with a balanced, water-soluble fertilizer

Propagation Methods

Division and Stem Cuttings

  • Most common propagation method is division of the rhizomes

Seeds

  • Less common due to variable germination rates

  •  Seeds require warm, humid conditions to sprout successfully

Common Pests & Diseases

Typical Issues

  • Spider mites and mealybugs
  • Fungal infections

Treatment Recommendations

  • Insecticidal soap or neem oil
  • Improved air circulation
  • Careful watering practices

Notable Traits & Uses

  • Ornamental foliage
  • Adaptability in low-light conditions
  • Understated elegance and its role in showcasing the diversity within the genus
  • Robust growth and aesthetic appeal in indoor collections and conservatories
  • Subtle inflorescence and impressive leaf structure 

Conservation & Availability

Wild Population Status

  • Limited specific data on its conservation status
  • Habitat loss in tropical regions is a concern for many aroids

Market Availability

  • Available through specialty nurseries and botanical collections
  • Less common than some of its showier relatives

References & Resources

Further Reading

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