Leaves on elevated stems are shorter and narrower than lower leaves, generally, do not have serrated margins, and are pointed at the tip. Based in the College of Agriculture and Life Sciences, we reach millions of Corn speedwell (Veronica arvensis) is a small, weak, low-growing winter annual that thrives in thin open turf and often appears in solid stands.The lower leaves of corn speedwell are rounded and toothed, while the upper leaves are smaller and more pointed. Cooperative Extension has offices in every county, https://content.ces.ncsu.edu/corn-speedwell, Mountain Horticultural Crops Research & Extension Center, Vernon G. James Research & Extension Center, Entomology – Insect Biology and Management, Mountain Horticultural Crops Research and Extension Center, Weed Management in Nurseries, Landscapes & Christmas Trees, [sulfentrazone + prodiamine], MOA 14 + 3 (Echelon 4 SC) 4 SC, [thiencarbazone-methyl + iodosulfuron + dicamba], MOA 14 + 2 + 4 (68 WG) (Celsius WG), [thiencarbazone-methyl + foramsulfuron + halosulfuron], MOA 14 + 2 + 2 (60.5 WG) (Tribute Total), carfentrazone-ethyl, MOA 14 (1.9 EW) (various brands), [carfentrazone + 2,4-D ester + MCPP + dicamba], MOA 14 + 4 + 4 + 4 (2.2 EC) (Speed Zone), [carfentrazone + 2,4-D ester + MCPP + dicamba], MOA 14 + 4 + 4 + 4 (0.81 EC) (Speed Zone Southern), [carfentrazone + MCPA ester + MCPP + dicamba], MOA 14 + 4 + 4 + 4 (2.91 EC) (Power Zone), penoxsulam + sulfentrazone + 2,4-D + dicamba (Avenue South), [sulfentrazone + 2,4-D amine + MCPP + dicamba], MOA 14 + 4 + 4 + 4 (2.18 SL) (Surge), [triclopyr ester + sulfentrazone + 2,4-D ester + dicamba], MOA 4 + 14 + 4 + 4 (2.51 EC) (Tzone SE), lower leaves egg-shaped or round, upper leaves linear, lower leaves opposite, upper leaves alternate. The upper leaves are more pointed. A dense, vigorous turf is the best way to reduce the encroachment of this weed. Corn Speedwell (Veronica arvensis) is a hard-to-control weed that blossoms in winter annually. to exist in the county by There are several types of Speedwell, all with numerous small, lobed leaves and small flowers, which vary in the color and can be white, blue, pink, and purple. State documented: documented populations both exist in a county, only native status Photos and information about Minnesota flora - Corn Speedwell: 1/8-inch tubular blue to violet flowers with 4 rounded lobes of unequal size, and 2 white stamens N.C. (Optional) Corn speedwell (Veronica arvensis) is a small, weak, low-growing winter annual that thrives in thin open turf and often appears in solid stands. VT. Fields, lawns, roadsides, waste areas. For details, please check with your state. Macro closeup of blue corn speedwell flower. Corn speedwell is similar in many respects to Persian and ivyleaf speedwell. Like the other speedwells, the leaves are both alternate (end of stem) and opposite (base of stem). History and Folklore of Speedwell The name speedwell comes from an old meaning of the word speed, "thrive." It is low-growing and can form dense patches in a lawn. Also covers those considered historical (not seen NC State University and N.C. A&T State University work in tandem, along with federal, state and local governments, to form a strategic partnership called N.C. Corn Speedwell (Veronica arvensis) Blooming from early through mid-spring (depending upon your area) Corn Speedwell, a member of the Scrophulariaceae (Figwort) family, is an introduced plant from Europe. This Extension factsheet can also be viewed at: N.C. Below: Corn Speedwell and Thymeleaf Sandwort with pin. Known hazards of Veronica arvensis: None known Plant information taken from the Plants For A Future. Bentley. … Corn speedwell is a winter annual weed that is classified by herbicide manufacturers as hard to control. Speedwells have a short taproot to fibrous root systems and branching upright stems. Corn speedwell flowers are small and white to blue in color. is shown on the map. Corn speedwell – Veronica arvensis. Speedwell is plentiful now in spring. Take a photo and The weeds will take over a lawn with a thick bed of leaves that will sprout pale blue and white colored flowers. The plant is covered with fine hairs. Flower stalks are 0.5 to 2 mm. corn speedwell. Both the leaves and stems are fleshy. The hardy medium sized speedwell, with striking 1 to 3 foot flower spikes, flourishes in USDA hardiness zones 3-8… To reuse an The lower leaves are near round with toothed margins. Information available on this site is provided by faculty and staff in the Departments of Crop and Soil Sciences, Entomology and Plant Pathology, and Horticultural Science at NC State University. Corn Speedwell. those considered historical (not seen in 20 years). state. Seeds need contact with soil sunlight and moisture to sprout and grow. The plant has a long blooming season, from June to August, and is fairly pest and disease resistant as well, with the exception of some issues like powdery mildew, spider mites, and thrips. A dense matt forming weed of thin or poor quality turf. Corn speedwell is a winter annual that germinates in mid-fall. The entire corn speedwell plant is covered with soft, fine hairs. The upper leaves are more pointed. Your help is appreciated. post It is often difficult to tell one species from another. Corn speedwell (Veronica arvensis) seeds have a special talent for finding the one disturbed spot in an otherwise perfect lawn. Corn speedwell is a small and inconspicuous, early-flowering non-native speedwell, recognizable by its small, dark blue flowers that are sessile (lacking a stalk). Veronica arvensis Some edges of the petal, near the corolla’s throat, have hairs growing on them. to exist in the state, but not documented to a county within Non-native: introduced It is hardy to zone (UK) 5. Several species of speedwell are sometimes considered weeds in lawns. The fruit is a heart-shaped … Winter annual broadleaf weeds germinate in the fall or winter and grow during any warm weather, which may occur in the winter, but otherwise remain somewhat dormant during the winter. Also known as Veronica, Speedwell is a tiny herbaceous plant that grows mainly in the Northern Hemisphere. Actual size of lower (left) and upper (right) leaves of corn speedwell. The lower, non-flower, portion of the plant has leaves that are round-to-oblong with rounded teeth on the margin in an opposite arrangement. Veronica arvensis L.. Scrophulariaceae (Figwort family) Life cycle. If a section of a Corn Speedwell petal is removed from the flower, and examined under the microscope, its variable blue pigmentation, and cellular structure are visible. At the very base of the corolla tube, the structure is green in colour due to the presence of chlorophyll. Weed Identification. Cooperative Extension, which staffs local offices in all 100 counties and with the Eastern Band of Cherokee Indians. Suitable for: light (sandy), medium (loamy) and heavy (clay) soils and prefers well-drained soil. The lower leaves of corn speedwell are rounded and toothed, while the upper leaves are smaller and more pointed. Corn speedwell is similar in appearance to Persian and ivyleaf speedwell. They are usually very weedy species. The species is a native European plant and a common weed in gardens, pastures, waste places and cultivated land. North Carolina citizens each year through local centers in the state's 100 counties wall speedwell. 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