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Azure-blue Anagallis arvensis, a blue form. Anagallis arvensis (syn. Lysimachia arvensis), commonly known as the scarlet pimpernel, red pimpernel, red chickweed, poor man's barometer, poor man's weather-glass, [1] shepherd's weather glass or shepherd's clock, is a species of low-growing annual plant with brightly coloured flowers, [2] most often scarlet but also bright blue and sometimes pink.
Lobelia inflata.Flower. Lobelia inflata is an annual or biennial herbaceous plant growing to 15–100 cm (5.9–39.4 in) tall, with stems covered in tiny hairs. Its leaves are usually about 8 cm (3.1 in) long, and are ovate and toothed.
Acmispon glaber (previously Lotus scoparius) (common deerweed, deer weed, deervetch, California broom or western bird's-foot trefoil) is a perennial subshrub in the family Fabaceae (pea family). [2] The plant is a pioneer species found in dry areas of California , Arizona , and Mexico .
A 2003 report noted that 99% of the cannabis eradicated under this program in 2003 was feral cannabis, not cultivated plants. [ citation needed ] Feral cannabis is an exceptionally hardy weed, widely dispersing its seeds which can lie dormant for 7–10 years before sprouting again. [ 4 ]
In 2014, North Dakota State University's "ND Weed Control Guide" selected Amaranthus palmeri, as "weed-of-the-year" to raise awareness about its "potentially devastating impact." [ 19 ] : 5 In 2015, Palmer amaranth was chosen as "weed-of-the-year" for the second year in a row as a "proactive approach to prevent Palmer amaranth establishment in ...
Many of the attacked plants were completely defoliated. [20] Calligrapha suturalis was introduced to Russia, and then China, for ragweed control, with very positive initial results. SMARTER is a European interdisciplinary network of experts involved in the control of ragweed, health care professionals, aerobiologists, ecologists, economists ...