blue vervain

Names and Synonyms

Common Names

• American blue vervain
• blue vervain
• simpler's-joy
• swamp vervain
• American Vervain
• wild hyssop

Scientific Names

Accepted name

Synonyms

• Verbena hastata var. paniculata
• Verbena hastata var. pinnatifida
• Verbena hastata f. rosea
• Verbena paniculata
• Verbena pinnatifida
• Verbena hastata var. oblongifolia
• Verbena hastata var. rosea
• Verbena hastata var. scabra
• Verbena hastata f. albiflora
• Verbena paniculata var. pinnatifida
• Verbena hastata f. caerulea

Regional and Traditional Names

Sources: Wikidata, Catalogue of Life

Taxonomical Classification

This plant belongs to the kingdom Plantae and is classified under the phylum Streptophyta and the class Equisetopsida. Within the subclass Magnoliidae, it is further organized into the order Lamiales and the family Verbenaceae. Finally, its taxonomic identity is defined by its placement in the genus Verbena.

Sources: The World Checklist of Vascular Plants (WCVP)

Distribution

This plant exhibits a broad geographical distribution spanning across both Europe and North America. In Northern Europe, its presence can be documented within Great Britain. Its range extends through Middle Europe, where it is found in both Austria and Germany. Moving across the Atlantic, the species is also established in Western Canada. Specifically, it inhabits the diverse landscapes of British Columbia and Manitoba.

Sources: The World Checklist of Vascular Plants (WCVP)

Botanical Identification

Ecology

The ecology of Verbena hastata is characterized by its status as an introduced weed, allowing it to colonize diverse environments across various geographic regions. It typically thrives in disturbed habitats, such as roadsides, riverbanks, meadows, and agricultural field margins, where it can quickly establish itself in open sunlight. As a resilient colonizer, it prefers moist to mesic soil conditions but demonstrates significant adaptability to varying moisture levels, often outcompeting native vegetation in nutrient-rich, disturbed soils. Its ability to spread effectively through seed production enables it to integrate into new ecosystems, where it functions as an opportunistic species within the local plant community.

Habitat :

introduced weed

Life history

The life history of Verbena hastata is characterized by a flexible reproductive strategy, as its lifecycle can be categorized as variable, encompassing annual, biennial, or perennial stages depending on environmental conditions. In terms of its structural growth habit and survival mechanisms, the plant exhibits distinct life forms; it is classified as a therophyte, completing its life cycle through seeds, but also functions as a hemicryptophyte, where its perennating buds are protected at or just below the soil surface during unfavorable periods.

Life form :

hemicryptophyte

Life form :

therophyte

Lifecycle :

perennial

Morphology

The morphology of Verbena hastata is characterized by its growth form as a non-woody herb and forb, reaching a maximum plant height of approximately 1.5 m. The plant functions as a self-supporting organism, lacking any climbing or liana-like tendencies, and it is categorized as a terrestrial species rather than an aquatic or epiphytic one. As an independent organism, it does not exhibit parasitic behavior, maintaining a self-contained life cycle within its habitat.

Aquatic :

terrestrial

Climber :

self-supporting

Epiphyte :

terrestrial

Growth form :

herb

Growth form :

forb

Parasite :

independent

Plant height max:

1.5 m

Woodiness :

non-woody

Physiology

The physiology of Verbena hastata is characterized by a metabolic framework governed by a C3 photosynthetic pathway, where carbon fixation occurs directly through the enzyme RuBisCO during the Calvin cycle. This process involves the initial fixation of atmospheric carbon dioxide into three-carbon molecules, a mechanism typical of many temperate herbaceous perennials. To support its rapid growth and reproductive cycles, the plant manages gas exchange and transpiration through specialized stomatal regulation, balancing the intake of CO2 with the prevention of excessive water loss. Its physiological processes are closely integrated with its structural development, utilizing the energy derived from C3 photosynthesis to drive the synthesis of secondary metabolites and the maintenance of cellular homeostasis throughout its seasonal life cycle.

Photosynthetic pathway :

C3

Reproduction

The reproduction of Verbena hastata is characterized by a specific phenological window and the production of highly diminutive seeds. The flowering period typically begins in July and extends through September, though the timing can be variable depending on environmental conditions. During this reproductive phase, the plant produces seeds that are notably lightweight, with a mean seed mass of approximately 0.0002305 g. The individual seed weight fluctuates within a narrow range, reaching a minimum of 0.000132 g and a maximum of 0.00032 g, facilitating efficient dispersal mechanisms.

Flowering time :

Jul

Flowering time :

Sep

Seed mass max:

0.00032 g

Seed mass mean:

0.0002305 g

Seed mass min:

0.000132 g

Sources: Global Inventory of Floras and Traits (GIFT)

Chemicals

Verbena hastata has 5 reported phytochemicals identified across 0 scientific publications and several other databases. The most consistently reported chemicals include 1-OCTEN-3-OL, Cornin, Hastatoside, Verbenalin, palmitic acid.

1-OCTEN-3-OL

1. Plants (Basel, Switzerland)

Cornin

1. Dr. Duke

Hastatoside

1. Dr. Duke

Verbenalin

1. Dr. Duke

palmitic acid

1. Plants (Basel, Switzerland)

Activities

Verbena hastata has 10 reported activities identified across 0 scientific publications and several other databases. The most consistently reported activities include Abortifacient, Analgesic, Antiinflammatory, CNS-Stimulant, Cathartic.

Abortifacient

1. Dr. Duke

Analgesic

1. Dr. Duke

Antiinflammatory

1. Dr. Duke

CNS-Stimulant

1. Dr. Duke

Cathartic

1. Dr. Duke

Coagulant

1. Dr. Duke

Parasympathicomimetic

1. Dr. Duke

Parasympathomimetic

1. Dr. Duke

Purgative

1. Dr. Duke

Uterotonic

1. Dr. Duke