Facelis retusa is a winter annual with freely branched stems at teh base. Facelis leaves are narrow in shape with a dull green upper surface and a lower surface covered with white turfs of long hairs. Facelis can be found in Tennessee and North Carolina, and south into north Florida and west to Texas and Oklahoma.
Venice, Englewood & North Port
Soliva sessilis is a low-growing, freely branched winter annual. Leaves alternate with sparse hair and are twice divided into narrow lobes. Lawn Burweed occurs in most turf and is generally found in the Coastal Plain and Piedmont regions of most southern states, as well as in North Carolina, south into Florida and west to Texas.
Veronica arvensis L. is a low-growing winter annual with two levels of leaves. The lower leaves are near rounded with toothed margins while the upper leaves are smaller in size and more linear in shape. Corn Speedwell can be found throughout the United States, with the exclusion of the Rocky Mountain Region.
Polygonum aviculare is a mat-forming, summer annual identifiable by its blue-green colored, alternating leaves. Leaves are smooth, oblong to linear in appearance and joined to the stem by a sheathing membrane. The annual flowers from late spring until frost and is found throughout the United States.
Oxalis stricta is a herbaceous perennial found in warmer climates and annual in cooler areas. Yellow Woodsorrel is identified by its green to yellow-green, alternating leaves, divided into three partly-folded, lobes appearing heart-shaped. It can be found in most of the Eastern and Central United States.
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Weeds are described as plants growing where they are not wanted. They can disrupt the appearance and use of lawns, recreational areas, and other turfs. In addition, they compete with desired turfgrasses for space, water, nutrients, and light. Turf weeds may be grasses, grass-like plants (rushes and sedges), or broadleaf plants with annual, biennial, and/or perennial life cycles.
Weeds are classified as summer annuals, winter annuals, biennials, and perennials. Annuals complete their life cycles in one season by flowering, maturing seed, and dying. Summer annuals germinate from late March through July, depending on the location. They flower in the summer and die in the fall. Winter annuals germinate in the fall and early winter and usually die with warm weather in the spring or summer; however, they may continue to grow into early summer in cool seasons. Biennial weeds have a two-year life cycle. They create vegetative structures (leaves, stems, and roots) during the first year, and reproductive structures (flowers and seeds) the second. Perennials live more than two years and may produce seed each season.