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Amorphophallus atrorubens Hett. & Sizemore

Introduction & Overview

Common and Scientific Names

  • Scientific Name: Amorphophallus atrorubens Hett. & Sizemore
  • Common Name: Not widely established

Quick Facts

  • Origin: Native to tropical regions of Southeast Asia
  • Features:  a deep red spathe and a contrasting spadix; it is noted for its unusual inflorescence and robust growth habit

Taxonomy & Classification

  • Genus: Amorphophallus 
  • Botanical Background: Described by botanists Hett. and Sizemore. Their work contributed to a more detailed understanding of aroid diversity and has been influential in modern aroid taxonomy.

Natural Habitat & Distribution

  • Geographical Range: Native to tropical lowland forests of Southeast Asia, where rich biodiversity and humid conditions prevail.
  • Environment: Naturally thrives in warm, moist environments with high humidity; favors well-drained, organic-rich soils under partial shade in densely vegetated areas.

Morphological Characteristics

Leaves

  • Large and lobed
  • Glossy texture and a deep green coloration
  • Their broad form helps maximize light absorption in the dim understory of tropical forests

Inflorescence (Spadix & Spathe)

  • Striking, featuring a dark red spathe paired with a contrasting spadix
  • The structure is designed to attract specific pollinators and may emit a subtle, distinct scent

Growth Habit

  • A terrestrial species, tuberous perennial
  • Develops an underground tuber that supports its annual growth cycle

Cultivation & Care

Light Requirements

  • Thrives in bright, indirect light while avoiding harsh, direct sunlight

Watering & Humidity

  • Consistent watering to keep the soil evenly moist is crucial
  • High ambient humidity is ideal

Soil & Potting Mix

  • A loose, well-draining potting mix rich in organic matter is recommended
  • Containers should allow for good drainage to prevent root rot

Temperature & Fertilizer

  • Maintain warm temperatures throughout the growing season
  • Balanced fertilizer applied every few weeks during active growth

Propagation Methods

Division and Cuttings

  • Most effective propagation technique is through division of the tubers
  • Allows growers to maintain the genetic integrity of the species

Seeds

  • Germination can be challenging; specialized conditions are needed

Common Pests & Diseases

Typical Issues

  • Aphids and mealybugs
  • Root rot can occur if the plant is overwatered or planted in poorly draining soil

Treatment Recommendations

  • Use insecticidal soap for pest control or neem oil for an organic solution
  • For root rot, remove affected roots, treat with a fungicide, and ensure proper drainage in the pot

Notable Traits & Uses

  • Garnered interest for its rare and dramatic inflorescence
  • Its unique coloration and structural features have spurred local folklore and scientific curiosity
  • Prized for its unusual appearance and rarity
  • Its impressive inflorescence makes it a centerpiece in specialized tropical plant collections

Conservation & Availability

Wild Population Status

  • Due to its limited native range, conservation efforts are important
  • Habitat loss in tropical regions poses a potential risk to wild populations

Market Availability

  • Considered rare in cultivation
  • Typically available only through specialized growers and aroid societies

References & Resources

Further Reading

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