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Annual, broadleaf (sometimes survives as a short-lived perennial).

RANGE: Throughout the United States.

APPEARANCE: With its three leaflet, cloverlike leaves, this legume is often confused with white clover. Low growing, with trailing, slightly hairy stems, it produces clusters of small, bright yellow flowers in late spring to early summer.

GROWTH: Black medic is common in lawns from May through September. It is especially prevalent in dry soils where turf is spotty and in high-phosphorus soils. Though an annual, it can be as persistent as a perennial.

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RANGE: Throughout the United States

APPEARANCE: Henbit, a member of the mint family, is an upright winter annual that blooms in the spring. The leaves are rounded on the end with rounded toothed edges that grow opposite one another on square stems Upper leaves lack petioles. Henbit can grow from 4 to 12 inches tall on weak stems.

GROWTH: Although an upright plant, weak stems sprouting from the bottom may lay almost horizontal. Henbit spreads only by seed and is generally not a problem in dense, vigorous turfgrass sites.

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Perennial, broadleaf

RANGE: Throughout the United States and southern Canada.

APPEARANCE: Broadleaf plantain has gray-green, egg-shaped, wavy-edged leaves growing in ground-hugging rosettes. Narrow seed heads appear in a long cluster on a central, upright stem.

GROWTH: Rosettes appear in mid-spring in thin and weakened turf. Seed stalks rise from early summer through September. The rosette has a tendency to suffocate desirable lawn grasses. Plantain grows from seed and re-sprouting roots. Seed germinates best in rich, moist, compacted soil.

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RANGE: Throughout the United States

APPEARANCE: The name of this weed offers a clue to its appearance. It has long, narrow, fleshy leaves that look fuzzy. Small, white flowers appear in late spring and early summer, followed by seed heads in mid summer.

GROWTH: This weed grows most actively during spring and early summer when it spreads by means of creeping stems that root at the nodes. It grows close to the ground and can withstand low mowing. It grows vigorously in moist, poorly drained, and shaded areas.

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Perennial, broadleaf

RANGE: Comming Soon.

APPEARANCE: Comming Soon

GROWTH:Comming Soon

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RANGE: Throughout the United States

APPEARANCE: Has bright yellow flowers and green leaves. It grows upright. O. europaea (also called O. Oxalidaceae) is a perennial with seeds and rootstocks so that it sometimes appears to be a creeping vine. The leaves and stems are often purple or reddish.

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RANGE: Throughout the United States.

APPEARANCE: The leaves are compound, with 3 broad leaflets (sometimes 4, if you’re lucky!) 1.3 – 2.5 cm long, with tiny teeth on the edges, a pale triangular mark appears on each leaflet.

GROWTH: Appear from May to September

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RANGE: Throughout the United States, especially troublesome east of the Mississippi River.

APPEARANCE: Sprawling, thick, fleshy stems with rubbery leaves. Tiny, yellow, five-petaled flowers open when the sun is shining brightly. Cup-shaped seedpods produce many small, black seeds that may lie dormant in the soil for years. Seldom found in the spring when the lawn is treated for other weeds.

GROWTH: Thrives in hot, dry weather, spreading by sprawling stems. It’s extremely troublesome in thin areas of the lawn or in new lawns seeded in summer.

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RANGE: Throughout the United States.

APPEARANCE: 6 to 36 inches in height. Erect stems support linear, alternate, and apetiolate leaves of a bluish-green hue. The species exhibits yellow-green inflorescence on an umbel near the top of the stem. The yellow-green bracts are the most colorful and conspicuous part of the plant. A milky white sap (latex) is present in all parts of the plant, and aids in identification.

GROWTH: The plant occurs primarily in non-cropland habitats, including roadsides, prairies, savannas, and woodlands. It is tolerant of a wide range of habitats, from damp to very dry soils.

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RANGE: Throughout the United States

APPEARANCE: Also called creeping Charlie, is a common lawn weed problem. Lawns in shaded areas and often with poorly drained fertile soil are typical sites for ground ivy to develop into a major problem. This plant may form extensive patches as it creeps along the soil and can move into sun areas. Stems are square. Leaves are arranged opposite of each other along stems, and are round to somewhat kidney shaped with rounded, toothed margins. Crushed leaves have a minty odor. Ground ivy has small funnel-shaped purplish-blue flowers.

GROWTH: April To June

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RANGE: Throughout the United States.

APPEARANCE: Wild violet is a winter perennial, growing 2 – 5 inches tall. It can have a tap root or a fibrous root system, and also can produce rooting stolons and rhizomes. The leaves can vary but usually are heart shaped, on long petioles with scalloped to shallow rounded margins. The flowers of wild violet range from white to blue to purple. Wild violet flowers are pansy-like with three lower petals and two lateral petals on long single flower stalks.

GROWTH: Appear from March to June

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RANGE: Throughout the United States.

APPEARANCE: Annual bluegrass has a boat-shaped tip, folded in the bud. The ligule is membranous and auricles are absent. Annual bluegrass has a small panicle seedhead.

GROWTH: Annual bluegrass contains both annual and perennial species. Annual bluegrass forms dense patches that can withstand low mowing heights. Germination occurs in late summer and early spring.

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RANGE: Throughout the United States

APPEARANCE:he leaves are rolled in the bud. The collar is narrow and continuous. The seed head is a bushy, erect spike which resembles the tail of a fox. GROWTH: Yellow foxtail is a summer annual which germinates when soil temperatures reach 65 degrees F.

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RANGE: Barnyard grass is found throughout the United States and Mexico

APPEARANCE: The leaves of barnyard grass are rolled in the bud and contain neither a ligule nor auricles; the sheath is open but compressed. The mid-vein is thick and keeled; roots are fibrous.

GROWTH: Barnyard grass is a summer annual which has tillers which lie flat and form secondary roots resulting in a mat formation. Barnyard grass spreads by seed which germinate in late spring and early summer. The seedhead is a coarsely branched green to purplish panicle with spiked awns.

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RANGE: Comming Soon

APPEARANCE:Comming Soon

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RANGE: Southern areas of the United States

APPEARANCE:The leaves of Bermuda grass are folded in the bud, and the sheath is strongly compressed. The leaf is short, approximately 1/8 inch wide with rough edges. The seed head of Bermuda grass consists of 3 – 7 finger-like spikes.

GROWTH: Bermuda grass is found in open sunny areas. Bermuda grass does not grow in the shade. It can be found in turf, landscapes and in most cultural crops. Bermuda grass is very tolerant of low mowing, and can be found on both dry and wet soils.

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RANGE: Throughout the United States

APPEARANCE: Smooth and hairy crabgrass have a prostrate growth habit with coarse, light green blades. The blades are short, pointed, and hairy.

GROWTH: This vigorous, warm-season annual grass grows rapidly from early spring until seed heads form in late summer to early fall. It grows especially well in lawns that are watered lightly, under-fertilized, poorly drained, and growing thinly. The plant spreads by seed, and to a lesser extent, by rooting from the lower swollen nodes of stems.

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RANGE: Coastal states from New Jersey to California, and as far north as Missouri.

APPEARANCE: Coarse blades, somewhat upright in a bunch-type growth. Rhizomes are so closely jointed that they appear almost scaly. Stems 2 to 6 inches long emerge from the plant center in a star-like pattern. Seed heads are sparsely branched on long stems. Seeds lie dormant over the winter and sprout very early in spring.

GROWTH: This is a summer weed in many areas of the country, but it grows throughout the year in mild climates, and thrives in those areas that are low and wet.