Verbena hastata

Verbena hastata

:"Blue Vervain" redirects here. This name is also used for Common Vervain ("V. officinalis")."Taxobox
name = Swamp Verbena


image_width = 240px
regnum = Plantae
divisio = Magnoliophyta
classis = Magnoliopsida
ordo = Lamiales
familia = Verbenaceae
genus = "Verbena"
binomial = "Verbena hastata"
binomial_authority = L.

"Verbena hastata" (Blue Vervain or Swamp Verbena) is a flowering plant in the vervain family, Verbenaceae. It is a herb with opposite, simple leaves which have double-serate margins, borne on stiffly erect, branching square stems. The flowers appear in summer and are purple.

This species is a member of the diploid North American vervains which have 14 chromosomes altogether. Hybridization seems to have played some role in its evolution, presumably between some member of a group including the White Vervain ("V. urticifolia"), "V. lasiostachys" or "V. menthifolia", and "V. orcuttiana" or a related species.In the recent evolutionary past, there has been an incident of chloroplast transfer of one of the latter or the Swamp Verbena to the mock vervain "Glandularia bipinnatifida" which is a close relative of the genus "Verbena". It is unknown by what mechanism this happened, but it is suspected that hybridization is not responsible. [Yuan & Olmstead (2008)]

Footnotes

References

* (2008): A species-level phylogenetic study of the "Verbena" complex (Verbenaceae) indicates two independent intergeneric chloroplast transfers. "Mol. Phylogenet. Evol." 48(1): 23-33. doi|10.1016/j.ympev.2008.04.004 (HTML abstract)


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  • Verbena hastata — ID 87362 Symbol Key VEHA2 Common Name swamp verbena Family Verbenaceae Category Dicot Division Magnoliophyta US Nativity Native to U.S. US/NA Plant Yes State Distribution AL, AR, AZ, CA, CO, CT, DC, DE, FL, GA, IA, ID, IL, IN, KS, KY, LA, MA, MD …   USDA Plant Characteristics

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  • Verbena hastata var. hastata — ID 87363 Symbol Key VEHAH Common Name swamp verbena Family Verbenaceae Category Dicot Division Magnoliophyta US Nativity Native to U.S. US/NA Plant Yes State Distribution AL, AR, CT, DC, DE, FL, GA, IA, IL, IN, KS, KY, LA, MA, MD, ME, MI, MN, MO …   USDA Plant Characteristics

  • Verbena hastata var. scabra — ID 87364 Symbol Key VEHAS Common Name swamp verbena Family Verbenaceae Category Dicot Division Magnoliophyta US Nativity Native to U.S. US/NA Plant Yes State Distribution AZ, CA, CO, IA, ID, IN, KS, MI, MN, MT, ND, NE, NM, NV, OK, OR, SD, TX, UT …   USDA Plant Characteristics

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