Corn Speedwell

Corn Speedwell Plant Information

Corn Speedwell grows in the following 50 states:

Alaska, Arizona, Colorado, Connecticut, District Of Columbia, Georgia, Idaho, Illinois, Indiana, Kansas, Kentucky, Maryland, Minnesota, Mississippi, Montana, Nebraska, New Hampshire, New Mexico, North Carolina, Oklahoma, Pennsylvania, South Carolina, South Dakota, Utah, Vermont, Wisconsin, Wyoming, Oregon, West Virginia, Alabama, Arkansas, California, Delaware, Florida, Hawaii, Iowa, Louisiana, Maine, Massachusetts, Michigan, Missouri, Nevada, New Jersey, New York, Ohio, Rhode Island, Tennessee, Texas, Virginia, Washington

Veronica arvensis (common names: wall speedwell,:592corn speedwell, common speedwell, rock speedwell, ) is an annual flowering plant in the plantain family Plantaginaceae. The species is a native European plant and a common weed in gardens, pastures, waste places and cultivated land.

It is a hairy, erect to almost recumbent, annual herb, 9 to 40cm high from a taproot. The leaves are oppositely arranged in pairs about the stem. The lower leaves have short petioles; the upper are sessile. Each leaf, 1.5 to 2.5 centimeters in length, is ovate, or triangular with a truncated or slightly cordate base, with coarse teeth. Borne in a raceme, initially compact but elongating with age, the flowers are pale blue to blue-violet, 2 to 3mm in diameter, four-lobed with a narrow lowest lobe. Flower stalks are 0.5 to 2mm and shorter than the bracts. The fruit capsules are heart-shaped and shorter than the sepal-teeth. It flowers from April to October.
It is a noxious weed, common in gardens, pastures and waste places. It is native to Africa, Asia and Europe.
V. arvensis plants go through changes in their germination due to temperature and light, furthermore explaining what controls the timing of growth in buried seed reserves. These weeds tend to germinate in consistent temperature ranges of 10 degrees Celsius to 15 degrees Celsius. If they do not make the first autumn cycle of growth, they can grow in the following spring. Overall, light is a major source to their survival and growth. In other words, they can grow in darkness, however they will remain dormant unless they get light.
It is a medicinal plant. [clarification needed]
King, T.J (July 1975). "Inhibition of Seed Germination Under Leaf Canopies in Arenaria serpyllifolia, Veronica arvensis and Cerastum holosteoides". New Phytologist. 75 (1): 87-90. doi:10.1111/j.1469-8137.1975.tb01374.x.

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