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NC Native Plant Society:
Plant Details

Collinsonia verticillata

Whorled Horsebalm, Early Stoneroot, Deepwoods Horsebalm

Scientific Name:

Collinsonia verticillata

Genus:

Collinsonia

Species Epithet:

verticillata

Common Name:

Whorled Horsebalm, Early Stoneroot, Deepwoods Horsebalm

Plant Type

Herb/Wildflower

Life Cycle

Perennial

Plant Family

Lamiaceae (Mint Family)

Native/Alien:

NC Native

Invasive Status:

(*Key)

Size:

1-3 ft.

Bloom Color(s):

Pink, Purple

Light:

Part Shade - 2 to 6 hours of sun per day

Soil Moisture:

Dry, Moist

Bloom Time:

April, May, June

Growing Area:

Mountains, Piedmont

Habitat Description:

Rich forests, ranging from moist (cove) forests to rather dry oak forests over mafic or calcareous rocks. Very rare in NC mountains and piedmont.

Leaf Arrangement:

Opposite

Leaf Retention:

Deciduous

Leaf Type:

Leaves veined, not needle-like or scale-like

Leaf Form:

Simple

Life Cycle:

Perennial

Wildlife Value:

Has some wildlife value

Landscape Value:

Recommended and Available

State Rank:

S2: Imperiled (*Key)

Global Rank:

G3 - Vulnerable, G4 - Apparently Secure (*Key)

State Status:

T: Threatened (*Key)

Leaves are large, toothed, broadly ovate, in 2 opposite pairs looking like a whorl.

UNC Charlotte Botanical Gardens, cultivated

The Scientific Name is Collinsonia verticillata. You will likely hear them called Whorled Horsebalm, Early Stoneroot, Deepwoods Horsebalm. This picture shows the Leaves are large, toothed, broadly ovate, in 2 opposite pairs looking like a whorl. of Collinsonia verticillata

Will Stuart

Pale lavender blossoms open in mid-spring each with 4 exserted stamens twice the length of the corolla.

UNC Charlotte Botanical Gardens, cultivated

The Scientific Name is Collinsonia verticillata. You will likely hear them called Whorled Horsebalm, Early Stoneroot, Deepwoods Horsebalm. This picture shows the Pale lavender blossoms open in mid-spring each with 4 exserted stamens twice the length of the corolla. of Collinsonia verticillata

Will Stuart

Links:

USDA PLANTS Database Record

https://auth1.dpr.ncparks.gov/flora/species_account.php
 

https://nc.audubon.org/700
 

https://plants.ces.ncsu.edu/plants/collinsonia-verticillata/
 

https://www.wildflower.org/gallery/species.php?id_plant=COVE3
 



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