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Species of flowering plant From Wikipedia, the free encyclopedia
Verbena urticifolia, known as nettle-leaved vervain[1] or white vervain, is a herbaceous plant in the vervain family (Verbenaceae). It belongs to the "true" vervains of genus Verbena.
| White vervain | |
|---|---|
| |
| Inflorescence | |
Scientific classification  | |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Clade: | Asterids |
| Order: | Lamiales |
| Family: | Verbenaceae |
| Genus: | Verbena |
| Species: | V. urticifolia |
| Binomial name | |
| Verbena urticifolia | |
White vervain has opposite, simple leaves on thin, rigid, green stems. The serrated leaves look similar to those of Urtica, which is the reason for the plant being named urticifolia. The small flowers are borne in spikes; they open in summer and unusually for this normally bluish-flowered genus are white. The fruit is a dark-colored capsule with many brown and thin seeds. The entire plant except for the flowers and fruit is covered in stiff bristles.
White vervain is native to eastern North America, excluding Mexico.[2]
White vervain is commonly found growing individually in disturbed areas with partial shade. It prefers mesic habitats.[3]
This species may be closest to a group that might include such North American species as V. lasiostachys or V. menthifolia, and the common vervain (V. officinalis) from Europe. Like these, it is diploid with a total of 14 chromosomes. The relationship of the swamp verbena (V. hastata) to these other species is more enigmatic; its evolution might have involved hybridization with the white vervain or a related species in the past.[4]
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