Richweed

Collinsonia canadensis

Also known as: Deepwoods Horsebalm

Richweed

Mason Brock (Masebrock)

Taxonomy

Division:
Magnoliophyta | - Flowering plants
Family:
Lamiaceae
Genus:
Collinsonia
Species:
Collinsonia canadensis

Growth Characteristics

Life Cycle:
Perennial
Growth Habit:
Forb/herb
Height:
4-6 ft
Light Requirements:
Part Shade
Drought Tolerance:
High
Bloom Months:
jul, aug, sep
Bloom Colors:
Yellow

Native Range

United States: Alabama, Arkansas, Connecticut, District of Columbia, Delaware, Florida, Georgia, Illinois, Indiana, Kentucky, Louisiana, Massachusetts, Maryland, Michigan, Missouri, Mississippi, North Carolina, New Hampshire, New Jersey, New York, Ohio, Pennsylvania, Rhode Island, South Carolina, Tennessee, Virginia, Vermont, Wisconsin, West Virginia, Canada: Ontario, Quebec

Keystone Species Ranking

Caterpillar Keystone:
★★★★★ Based on number of butterfly and moth species using this genus as host plant (Source: National Wildlife Federation)

Host Plant for Caterpillars

Erythroecia hebardi, Papaipema duplicatus, stalk borer moth (Papaipema nebris), the astute borer (Papaipema astuta), Holly Blue (Celastrina argiolus)

Soil Requirements

Soil Type:
rich, well-drained loamy soil
pH:
5.5 - 7.0 (slightly acidic to neutral)
Drainage:
tolerates poor drainage
Moisture:
consistently moist
Notes:
prefers shaded woodland environments

Germination Information

Pre-treatment: Cold-moist stratification for 30 days at 1–5°C (34–41°F).

Source: OpenAI GPT-4o