BugwoodWiki Article

tall vervain
Verbena bonariensis L.

Overview

Appearance
Verbena bonariensis, Tall vervain is a rapidly growing, erect, clump forming perennial herb. The 3-6 ft. (0.9-1.8 m) tall stems are slender, hirsute, rough and square. Upright stems branch widely off the central stem. V. bonariensis may survive as an annual in colder climates as it readily self-seeds.
Foliage
Leaves of V. bonariensis are dark green. Most of the leaves are in a basal rosette. The stem leaves are opposite and the base of the leaf clasps the stem. Leaves are elliptic to lanceolate, ranging from 3-5 in. (7.6-12.7 cm) long with serrate margins.
Flowers
The small five petaled flowers of V. bonariensis are lavender to purple and are borne in cymes. They bloom all summer until the first frost.
Fruit
V. bonariensis fruits are nutlets. Each flower produces four seeds.
Ecological Threat
V. bonariensis is native to South America. It has escaped cultivation and become naturalized in disturbed areas across the southeastern United States and in California. It is drought and heat tolerant and is very common along roadsides and other disturbed areas. V. bonariensis is very similar to V. montevidensis and V. incompta and all three are invasive species.

Selected Images


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tall vervain
Verbena bonariensis
Stem(s)
Joseph M. DiTomaso
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tall vervain
Verbena bonariensis
Stem(s)
Karan A. Rawlins
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tall vervain
Verbena bonariensis
Foliage
Karan A. Rawlins
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tall vervain
Verbena bonariensis
Flower(s)
Karan A. Rawlins
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tall vervain
Verbena bonariensis
Flower(s)
Rebekah D. Wallace
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tall vervain
Verbena bonariensis
Flower(s)
Karan A. Rawlins
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tall vervain
Verbena bonariensis
Flower(s)
Karan A. Rawlins
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tall vervain
Verbena bonariensis
Flower(s)
Karan A. Rawlins

Maps


EDDMapS Distribution - This map is incomplete and is based only on current site and county level reports made by experts, herbaria, and literature. For more information, visit www.eddmaps.org

EDDMapS Distribution

State Regulated List - This map identifies those states that list this species on their regulated list. For more information, visit Invasive.org

State Regulated List

Taxonomic Rank

Kingdom: Plantae
Phylum: Magnoliophyta
Class: Magnoliopsida
Subclass: Asteridae
Order: Lamiales
Family: Verbenaceae
Genus: Verbena

Other System Links

Plants: VEBO
Bayer: VEBBO
GRIN: 41154
ITIS: 32128
NPDN Pest: PFIAIBA

Synonyms and Other Names

Other Common Names:
purpletop vervain

Categories

Category: Forbs/Herbs
Category: Forbs/Herbs