Flowering Dogwood: Cornus Florida Essay

1489 words - 6 pages

Taxonomic ClassificationsFlowering dogwood is a member of the genus Cornus within the family Cornaceae. The currently accepted scientific name is Cornus florida. The taxonomic classification for the flowering dogwood is the following:Plantae (plants)Embryophyta (higher plants)Magnoliopsida (dicotyledons)CornalesCornaceae (dogwoods)Cornus (dogwoods)Cornus floridaCommon names of the species include: flowering dogwood, cornel, false boxwood, Florida boxwood, arrow wood, and bunchberry (Wood Bin, 2005).Cornus florida is the aristocrat of native flowering trees. The Dogwood tree has four-season character; beautiful flowers, summer and fall foliage, fruit and winter habit. It is excellent as a specimen plant, near a patio or corner of a house, in groupings, or against dark evergreens or building background where the flowers can be accentuated.Diagnostic FeaturesThe flowering dogwood has opposite, deciduous green leaves, 3-6 inches in length, that turn red and purple in autumn (ODNR, 2005). (Figure 1) The actual flowers are tiny and inconspicuous. They are a greenish yellow color and are surrounded by four snowy white or pink bracts, ovate to elliptical in shape, which are each approximately 2" long (ODNR, 2005). (Figure 2) The dogwood blooms in mid-spring, as its newer leaves are unfolding, and usually remain "snowy" for 2-3 weeks (ODNR, 2005). The true flowers that are occur in the center of the bracts produce numerous green football shaped fruits by early summer. These turn red by late summer and fully ripen by mid-autumn (ODNR, 2005). (Figure 3) The Dogwood tree can grow 15 to 20 feet in height with a spread equal to or greater than the height (ODNR, 2005). It prefers well-drained soil and grows best in partial sun. The bark on mature trees is broken up into small square blocks, and is often referred to as "alligator" bark. (Figure 4)EnvironmentThe range of flowering dogwood extends from extreme southwestern Maine west to New York, extreme southern Ontario, central Michigan, central Illinois, and central Missouri; south to extreme southeast Kansas, eastern Oklahoma, east Texas; and east to north Florida. A variety also grows in the mountains of Nuevo León and Veracruz, Mexico (McLemore, 2005). (Figure 5)Flowering dogwood grows well on flats and on lower or middle slopes, but not very well on upper slopes and ridges. The inability to grow on extremely dry sites is attributed to its relatively shallow root system (McLemore, 2005). Partial or broken shade is best, but flowering dogwood can tolerate full sun, too. It does best with some shade in the south and full sun in the north (OSU, 2005). It does not grow well in sandy soils, and prefers acidic soils with a pH of 6 or 7 (OSU, 2005). Dogwoods are tolerant of normal dry periods, but will need supplemental watering during extreme droughts (OSU, 2005). Stress of any kind makes dogwoods susceptible to diseases (ODNR, 2005).UsesFlowering dogwood is one of the most popular ornamental specimen trees...

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