sugarstick (Allotropa virgata) observed in San Juan County, WA, USA
iNaturalist: jsjensen
Mycorrhizal Networks
Sugarstick is a rare, fascinating plant that depends entirely on healthy old-growth forest fungal networks to survive, making it a living indicator of intact, undisturbed ecosystems in the Pacific Northwest.
Sugarstick is a wildflower that looks like a red-and-white peppermint stick poking out of the forest floor — it has no green leaves and can't make its own food from sunlight. Instead, it taps into underground fungal networks to steal the sugars those fungi share with nearby trees. Finding one means the forest soil beneath it is rich, complex, and largely undisturbed.
Key Findings
A research-grade observation of sugarstick (Allotropa virgata) was documented in San Juan County, WA, confirming its presence in that region.
Sugarstick is a mycoheterotrophic plant — it obtains 100% of its nutrients by parasitizing mycorrhizal fungi rather than photosynthesizing.
San Juan County observations contribute to citizen-science biodiversity records on iNaturalist, helping track the distribution of this uncommon forest indicator species.
chevron_right Technical Summary
A sugarstick plant (Allotropa virgata) was spotted and confirmed in San Juan County, Washington — a striking, candy-striped wildflower that cannot photosynthesize on its own and instead steals nutrients from fungi underground.
Abstract Preview
Research-grade observation of sugarstick in San Juan County, WA, USA.
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Species Mentioned
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Allotropa virgata is in the family Ericaceae and is the only species of the genus Allotropa. It is a perennial plant that gets its common names from the distinct white and red or maroon stripes along its erect peduncle. It is a non-green plant, as it lacks chlorophyll, instead obtaining nutrition...