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Appalachian Snakeroot

Ageratina roanensis

Also listed as Ageratina altissima var. roanensis

Found in moist forests, often abundant at high elevations. Weakley, Flora of the Southeastern United States (2025), Northern Tier edition What its natural habitat tells you

90
Keystone

Native to Virginia. How scores work Is it native here?

Profile 59%

Light
Partial shade, Full shade, Full sun
Soil moisture
Dry to moist
Will it fit your yard?

At a glance

Bloom
August to October

Not yet recorded · Height · Spread · Life cycle · Leaves

Height: NC species account not read yet.

Spread, life cycle and leaves: no source found yet.

Searched in old botany books; not found yet.

Recorded in 6 Virginia counties.

Natural habitats

Places it grows wild. Not a planting requirement. Each habitat page lists the plants and wildlife also found there.

Moist forests

Shortia beneath rhododendrons in mountain woodland
Regional / representative. Shown: Mountains of North and South Carolina; exact site not identified, a neighboring state.Shortia beneath rhododendrons in mountain woodland, Marian Ellis Rowan, 1901. Public domain. Source record.

All habitats

Also found with this plant

Wildlife whose habitat models include habitats this plant grows in, in Virginia. Shared habitat, not food. 142 animals.

All wildlife of Virginia

Ecological relationships

Who uses this plant?

What these records mean

40CaterpillarsGenus host records with ranges including VA

Genus host records with ranges including VA · Eupatorium

  • Agonopterix pulvipennellaGoldenrod Leaffolder, Featherduster Agonopterix
  • Anavitrinella pampinariaCommon Gray, Cranberry Spanworm
  • Carmenta bassiformisEupatorium Borer Moth, Ironweed Clearwing Moth
  • Carmenta pyralidiformisBoneset Borer Moth
  • Celastrina neglectaSummer Azure
  • Chlorochlamys chloroleucariaBlackberry Looper Moth
  • Chrysodeixis includensSoybean Looper Moth
  • Cisseps fulvicollisYellow-Collared Scape Moth
  • Condica vecorsDusky Groundling
  • Dichomeris setosellaHairy Dichomeris
Show all 40
  • Digrammia continuataCurve-Lined Angle
  • Dysodia oculatanaEyed Thyris
  • Estigmene acreaSalt Marsh Moth, Acrea Moth
  • Eupithecia miserulataCommon Eupithacia, Common Pug
  • Feltia subgothicaSubgothic Dart
  • Feltia tricosaConfused Dart, Tricose Dart
  • Haploa clymeneClymene Moth
  • Leucospilapteryx venustellaSnakeroot Leafminer
  • Oedemasia concinnaRed-Humped Caterpillar, Red-Humped Appleworm
  • Oidaematophorus eupatoriiEupatorium Plume Moth
  • Orthodes majusculaRustic Quaker, Rustic Groundcat
  • Ostrinia obumbratalisSmartweed Borer
  • Papaipema cataphractaBurdock Border, Potato-Stalk Borer
  • Papaipema eupatoriiJoe-Pye Weed Borer, Eupatorium Borer Moth
  • Papaipema harrisiiHeracleum Stem Borer Moth, Cow Parsnip Borer
  • Perigea xanthioidesRed Groundling
  • Platynota flavedanaBlack-Shaded Platynota
  • Platynota rostranaOmnivorous Platynota
  • Pleuroprucha insulsariaCommon Tan Wave
  • Schinia trifasciaThree-Lined Flower Moth
  • Spoladea recurvalisHawaiian Beet Webworm
  • Synchlora aerataWavy-Lined Emerald, Camouflaged Looper
  • Synchlora frondariaSouthern Emerald
  • Tornos scolopacinariaDimorphic Gray
  • Agonopterix atrodorsella
  • Agonopterix eupatoriiella
  • Chionodes pseudofondella
  • Dichomeris washingtoniella
  • Dichrorampha leopardana
  • Niasoma metallicana
Shropshire & Tallamy 2025, Lepidoptera of North America north of Mexico, ZooKeys 1261 (ODbL)
34BeesSoutheastern regional records

Southeastern regional records · Eupatorium

Individual names are not available yet.

Noori, Seltmann & Orr 2026, A curated and integrated dataset for exploring global bee-plant interactions (GloBI), Zenodo, CC BY 4.0
4Specialist beesPollen specialists

Pollen specialists · Ageratina

  • Andrena asteris
  • Andrena hirticincta
  • Andrena nubecula
  • Colletes thysanellae
Smith, Bachelder, Russell, Morales, Mosher & Seltmann 2024, Bee-Specialization-Modeling v0.6.1 (specialist host table compiled from J. Fowler's pollen specialist bee lists), Zenodo, CC BY 4.0
1BirdsRecorded genus food-resource interactions; not a state feeding claim

Recorded genus food-resource interactions; not a state feeding claim · Eupatorium

  • Ortalis vetulaPlain Chachalaca
Hurlbert, Olsen, Sawyer & Winner 2021, Avian Diet Database, Scientific Data 8: 260 (CC0)

Direct food only: birds recorded eating this genus across North America. Caterpillars on host plants also feed nesting birds. NC Native Plant Society: butterfly gardening

No records yet · Ants · Beetles · Flies · Adult butterflies / moths · Other wasps · Other insects

Growing and identification

Plant details

Family
Asteraceae

Safety has not been reviewed for this plant; check toxicity and thorns before planting.

Growing sources and scope
Also known as

Ageratina altissima var. roanensis; thoroughwort

Conservation status

Virginia rankS3S4
Global rankG5T3T4 [G3G4]
VA statusNot verified
Federal statusNot verified

Conservation source Global and federal source

In your garden

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Sources