Arkansas Ironweed

Vernonia arkansana

Taxonomy

Division:
Magnoliophyta | - Flowering plants
Family:
Asteraceae
Genus:
Vernonia
Species:
Vernonia arkansana

Growth Characteristics

Life Cycle:
Perennial
Growth Habit:
Forb/herb
Height:
6-8 ft
Light Requirements:
Full Sun
Drought Tolerance:
Medium
Bloom Months:
aug, sep, oct
Bloom Colors:
Pink, Purple

Native Range

United States: Arkansas, Illinois, Indiana, Kansas, Missouri, New York, Ohio, Oklahoma, Wisconsin

Keystone Species Ranking

Bee Keystone:
★★★★☆ Based on number of native bee species using this genus for pollen and nectar (Source: National Wildlife Federation)

Host Plant for Caterpillars

ironweed clearwing (Carmenta bassiformis)

Reported Fauna Sightings

Bees: American bumble bee (Bombus pensylvanicus), American bumble bee (Bombus pensylvanicus)

Soil Requirements

Soil Type:
rich, well-drained loamy soil
pH:
5.5 - 7.0 (slightly acidic to neutral)
Drainage:
good drainage required
Moisture:
consistently moist
Notes:
prefers fertile soils in open areas

Germination Information

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

Source: OpenAI GPT-4o