January 20, 2019

Weed ID

Bermuda Grass
A wiry perennial with long, slender, creeping rhizomes and stolons. Stolons spread laterally over the ground, rooting freely at any node, above or below ground. The seed heads are upright and bear a group of 3 or 7 spikes up to 2 inches long. Bermudagrass actively grows with hot weather approximately April through the first frost.

Chamomile
Often called dog fennel, this weed is an annual bushy broadleaf plant that germinates in early spring.This plant contains a fibrous root system. It can occupy one full square meter. Scentless chamomile grows up to a meter high and exhibits a ring of white petals surrounding a brilliant yellow center that blooms continually. Although they may look like a daisy, they like to bloom among Roadsides, drainage ditches, as well as fence lines, hayfields and pastures.

Coast Fiddleneck
Coast fiddleneck is a native winter annual with upright stems, and
inhabits agricultural land and other disturbed areas. This weed’s fruits can be toxic to livestock when consumed in quantity. Poisonings most often occur when livestock ingest contaminated grain or feed. It can reach up to 4 feet (1.2 meters) tall. Leaves are alternate to one another along the stem and are stalkless, except for the short-stalked lower leaves. Leaves are long and narrow to spear shaped with smooth edges and sparsely to moderately covered with stiff, bristly hair.

Crabgrass
Crabgrass is an annual weed that grows vigorously dry and hot conditions. Its seeds begin to sprout in mid-spring, when the soil temperature reaches around 55 degrees. Crabgrass gets its name because it grows low to the ground with stems that radiate out from the center of the grass clump, resembling crab legs. This weed thrives on stressed areas of your yard, like
dried-out lawns, thin patches, and sun-scorched areas.

Dandelion
Dandelions are a broadleaf perennial that can grow in any soil and are most numerous in full sunlight. In the early spring, new sprouts will emerge from the taproot, which can be 2 to 3 feet deep in the soil. They grow yellow flowers that mature and turn into white puffballs that contain seeds which spread with the wind to other lawns.
Even the most well groomed yard will have an occasional dandelion. They are difficult to completely eliminate and the entire plant (root and all) needs to be removed or they can grow right back.

Hog Potato

London Rocket
A winter annual, it is erect, usually 1 ½ to 2 feet tall.  Stems and leaves are smooth. Flowers are small, yellow and borne on slender stalk, with small clusters at stem tips.

Nutsedge
Nutsedge is a perennial, grass-like lawn weed. Although it’s sometimes called nutgrass, it’s not technically a grass. It’s a sedge. Its leaves are grasslike and yellow-green, and the spiky flower or seed head is yellow. Yellow nutsedge can be distinguished from good grasses by its V-shaped stem. Its leaves are bright green and have a waxy appearance, and grows faster than many lawn grasses, so it is often noticed when it outgrows the surrounding grass. It will also remain a bright green in summer when surrounding lawn grass may be a lighter green. Nutsedge thrives in low spots and high moisture areas that drain poorly, but can occur in drier sites as well.

Pineapple Weed
Pineapple weed is an erect weed that can grow up to about a foot tall. They have leaves that are divided into very short narrow segments. The heads are cone-shaped with many yellowish-green flowers, each head surrounded by several overlapping bracts with papery margins. This weed gives off an odor when it’s crushed.

Puncture Vine
This plant produces spiny seed burs that are sharp enough to cause severe pain to feet and hooves. They are sturdy enough to puncture rubber or leather, which means they can poke through shoe soles or bike tires. The spiny burs are harmful to agricultural crops, such as wool and hay. Puncture vine is adapted to grow in dry climate locations in which few other plants can survive.

Redstem Filaree
This weed is a winter annual or biannual with stems between 1 inch and 2 feet long. Their stems are either spread out or erect, generally from a rosette. The -leaves are divided into narrow feather-like or lobed or toothed segments. Both the leaves and the stems are hairy. Its flowers are a purplish/pink color, and are usually borne in clusters of 2 or more.

Ridgeseed Spurge
This weed is a summer annual with many branches that form circular mats. The stems are hairless, and branch heavily from the base and upper branches, forming dense spreading mats up to 12 inches across, or somewhat open and ascending in surrounding grasses. Leaves and stems exude milky sap when broken.

Russian Thistle
This weed, after drying out, is also known as a tumbleweed. Russian thistle is a bushy annual that grows 6 to 36 inches tall and reproduces from seed. Stems are usually red or purple striped. Flowers are green and hard to recognize near the upper leaves. Seeds are spread as mature plants break off at ground level and tumble with the wind. One plant typically produces about 250,000 seeds, which may remain viable for one year. Rapid germination and seedling establishment can occur with very limited amounts of precipitation. It is often found in dryland fields but is also common on disturbed and overgrazed rangeland.

Scarlet Globemallow
This perennial forb, with a stout taproot, grows 3 to 18 inches in height, topped with deep orange or light pink to brick red flowers. Leaves are grayish-green and palmately lobed. Both the leaves and the several erect stems are covered with silver-gray hairs that reflect solar radiation and protect against drying. These hairs, along with its deep root system, make it very drought tolerant. Scarlet globemallow exhibits low seed germinationdue to a hard seed coat. The hard seed coat enables long-term seed viability in the seedbank. Seeds then germinate when conditions are occasionally favorable.

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