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Bruso, George H.
Collinsonia canadensis L.
Citronella horsebalm, Richweed, Stoneroot
USDA Symbol: COCA4
USDA Native Status: Native to U.S.
A coarse perennial, up to 5 ft. tall, with large, oval, toothed leaves to the top of the stalk, and long, branched, terminal spikes of small, yellow flowers which stand above the leaves. The lower lip of each flower is fringed and extends beyond the upper lip. These flowers have a distinct lemony odor.
This tall wildflower is typical of moist woodlands. Its foliage as well as its flowers have a citronella-like odor. Tea can be brewed from the leaves, and the rhizome was formerly used as a diuretic, tonic, and astringent.
Plant CharacteristicsDuration: Perennial Habit: Herb Flower:
Fruit: Size Class:
Bloom InformationBloom Color: Yellow
Bloom Time: Jul , Aug , Sep
AL , CT , DC , DE , FL , GA , IL , IN , KY , LA , MA , MD , MI , MO , MS , NC , NH , NJ , NY , OH , PA , RI , SC , TN , VA , VT , WI , WV Canada: ON Native Distribution:
FL to MO, n. to NH, Ont. & c. IL Native Habitat:
Moist, rich, rocky woods USDA Native Status: L48(N), CAN(N)
Growing ConditionsLight Requirement: Part Shade
Soil pH: Circumneutral (pH 6.8-7.2)
Soil Description: Humus-rich soil.
Conditions Comments: Easy to care for and pest free. Benefits from wintercover. Foliage is sensitive to frost.
From the National Suppliers Directory
According to the inventory provided by Associate Suppliers, this plant is available at the following locations:
American Native Nursery
- Quakertown, PA
Recommended Species Lists
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Record Modified: 2007-01-01
Research By: TWC Staff