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Whorled Horsebalm

Collinsonia verticillata

Found in rich forests, ranging from moist (cove) forests to rather dry oak forests over mafic or calcareous rocks. Weakley, Flora of the Southeastern United States (2025), Northern Tier edition What its natural habitat tells you

36
Good

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

Profile 100%

Height
Up to about 20 inches
Light
Partial shade
Soil moisture
Usually moist
Will it fit your yard?

Rare or protected plant. Specialist conservation planting; excluded from routine garden suggestions. Plant caution source

Hidden from default planting suggestions. Wildlife value and native status remain unchanged.

At a glance

Life cycle
Perennial
Bloom
April and June
Fruiting season
June to July

Not yet recorded · Spread · Leaves

Recorded in 2 Virginia counties.

Natural habitats

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

1 of 3

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.

Dry forests and woodlands

Forests and open woodlands on dry ridges and slopes, often oak or pine.

Forests and woodlands

Forest or woodland where the source does not say how moist or dry.

All habitats

Also found with this plant

Wildlife whose habitat models include habitats this plant grows in, in Virginia. Shared habitat, not food. 112 animals.

All wildlife of Virginia

Ecological relationships

Who uses this plant?

What these records mean

7CaterpillarsGenus host records with ranges including VA

Genus host records with ranges including VA · Collinsonia

  • Celastrina neglectaSummer Azure
  • Lintneria eremitusHermit Sphinx
  • Melanchra adjunctaHitched Arches
  • Papaipema astutaStoneroot Borer Moth
  • Papaipema nebrisStalk Borer
  • Psectrotarsia hebardiHorse-Balm Sun Moth
  • Pyrausta demantrialis
Shropshire & Tallamy 2025, Lepidoptera of North America north of Mexico, ZooKeys 1261 (ODbL)
1BeesSoutheastern regional records

Southeastern regional records · Collinsonia

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
0Specialist beesPollen specialists
—BirdsRecorded genus food-resource interactions; not a state feeding claim

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

Growing and identification

Plant details

Family
Lamiaceae
Hardiness
Zones 4a–8a
Soil pH
Alkaline
Flower color
Pink or white
Fruit begins
June
Fruit ends
July
Growing sources and scope
Also known as

Whorled Stoneroot

Conservation status

Virginia rankS1
Global rankG3G4
VA statusNot verified
Federal statusNot verified

Conservation source Global and federal source

In your garden

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How to check your spot

Sources