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Vick, Albert F. W.
Vernonia noveboracensis (L.) Michx.
New York ironweed
Synonym(s): Vernonia harperi
USDA Symbol: veno
USDA Native Status: L48 (N)
New York ironweed is a tall, clump-forming perennial, growing 5-8 ft. in height. Slightly rough stems bear lance-shaped, deep-green leaves. Small flower heads occur in large, loosely branched, flat-topped, terminal clusters. Flowers are all of the disk type and deep reddish-purple in color. Tall erect stem branches toward the summit, with each branch bearing a cluster of deep lavender to violet flower heads; together, clusters form a loose spray.
This often roughish plant is common in wet open bottomland fields. It typically has more flowers per head than Tall Ironweed (Vernonia gigantea).
Plant CharacteristicsDuration: Perennial Habit: Herb Leaf:
Dark Green Fruit: Size Class:
Bloom InformationBloom Color: Red , Purple
Bloom Time: Aug , Sep
, WV Canada: ON Native Distribution: MA
s. to GA
& MS; more common near the coast Native Habitat:
Moist meadows, pastures & roadsides. Flourishes on slopes in the Edwards Plateau. Well-drained caliche and limestone.
Growing ConditionsWater Use: Medium
Light Requirement: Sun
Soil Moisture: Moist
Soil pH: Acidic (pH<6.8)
CaCO3 Tolerance: Medium
Drought Tolerance: Medium
Soil Description: Is found in moist soils in the wild, but will flourish in regular or dry soil. Tolerates clay and neutral to acidic conditions.
Conditions Comments: Juglone tolerant
BenefitUse Ornamental: As a tall, narrow plant, it is suited for the back of the border or tight spaces.
Use Wildlife: The flowers attract butterflies and seed heads attract birds.
Conspicuous Flowers: yes
Attracts: Birds , Butterflies
Nectar Source: yes
PropagationDescription: Sow seeds in fall or provide cold stratification. Germination is usually low so sow thickly. Also propagated by softwood cuttings taken in late spring or by division of clumps.
Seed Collection: Nutlets mature 3-4 weeks after the blooming period. Store dry in sealed, refrigerated containers.
Seed Treatment: This species requires or benefits from a three month period of cold-moist stratification in the refrigerator.
Commercially Avail: yes
National Wetland Indicator Status
This information is derived from the U.S. Army Corps of Engineers National Wetland Plant List, Version 3.1
(Lichvar, R.W. 2013. The National Wetland Plant List: 2013 wetland ratings. Phytoneuron 2013-49: 1-241). Click here
for map of regions.
Record Last Modified: 2010-04-28
Research By: TWC Staff