Fauna
Plant

Rattlesnake Fern

Botrypus virginianus

Also known as Virginia Grape Fern, Rattlesnake Grapefern

Rattlesnake fern produces a single compound frond divided into a delicate, lace-like sterile blade and an erect, stalked fertile spike laden with bright yellow spore sacs. Deeply reliant on underground mycorrhizal fungi, this delicate perennial emerges each spring in rich, undisturbed forest soils across North America and parts of Eurasia. Its common name stems from both the rattle-like appearance of its ripe sporangia and its shared preference for damp, snake-friendly woods.

FernShade TolerantUnderstory
Rattlesnake Fern reference1 / 7
(c) Douglas Goldman, some rights reserved (CC BY-SA), uploaded by Douglas Goldman · cc-by-sa
—observations
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Least ConcernConservation statusIUCN Red List categoriesLCNTVUENCREWEXLeast ConcernRed List categories, explained →
Key facts
Diet & preySoil Nutrients, Mycorrhizal Fungi, Sunlight
Predators
  • White-tailed Deer
  • Slugs
  • Insect Larvae
ThreatsDeforestation, invasive plant species, overbrowsing
HabitatsRich moist woods, hardwood forests, shaded ravines
Life spanPerennial (20+ years)
Classification
  1. OrderOphioglossales
  2. FamilyOphioglossaceae
  3. GenusBotrypus
  4. SpeciesBotrypus virginianus
Range & activity
Range data is not available yet.
Safe observation
Interaction riskLow
  1. Low
  2. Moderate
  3. High
  4. Very high
Why interaction risk is low
Safe to observe at a normal distance.
Responsible observation
  • Identification: Look for a single triangular, thrice-divided frond with a separate erect spore stalk branching from the stem.
  • Observation: Avoid trampling delicate forest duff around plants to protect fragile underground rhizomes and fungal networks.
  • Seasonal Timing: Search moist hardwood hollows in early to mid-summer when spore clusters mature to a warm yellow.
Related species
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