Squawroot (Conopholis americana)

Squawroot

Conopholis americana

A curious parasitic herb that steals nutrients silently. Non-photosynthetic perennial; common names: squawroot, cancer root.

Low light
0/week
Moderate
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Plant Needs

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Sunlight Non-photosynthetic; requires deep, full shade under oak or beech tree canopies; no direct sunlight is needed or tolerated
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Watering No supplemental watering required; obtains all moisture from host tree root systems; avoid overwatering the surrounding host soil
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Temperature Hardy to -20°C; thrives in cool temperate spring and summer temperatures between 10–25°C
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Characteristics

  • Leaf: Reduced to small, scale-like non-photosynthetic bracts along upright stems
  • Flower: Tubular, cream to pale yellow blooms clustered in dense terminal spikes
  • Stem: Fleshy, brownish-pink to tan unbranched stems with no visible foliage
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Care Guide

Watering

No supplemental watering; rely entirely on host tree moisture uptake

Fertilization

No fertilization required; obtains all nutrients from host tree. Do not apply fertilizers, as they may harm the host tree or disrupt the parasitic relationship

None required:No DIY fertilizers are needed; the plant obtains all necessary nutrients from its host tree roots
Pruning
  • Remove spent flower spikes after blooming to prevent unwanted self-seeding
  • Avoid disturbing host tree roots within 1 meter of the plant clumps
  • Clear fallen debris around clumps to maintain minimal air circulation
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Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA: No documented toxicity to cats

Humans: No documented toxicity to humans

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Garden Uses & Culture

Culture: N/A

Usage: Traditional medicinal uses by Indigenous North American peoples for various ailments