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Witchweeds are characterized by bright-green stems and leaves and small, brightly colored and attractive flowers. [5] They are obligate hemiparasites of roots and require a living host for germination and initial development, though they can then survive on their own. [6] The number of species is uncertain, but may exceed 40 by some counts. [6] [7]
Commonly considered a weed of gardens, fields, and lawns, it grows in full sun or shade. The alternate leaves of this plant are divided into three heart-shaped leaflets (a typical trait of other species of Oxalis) that can grow up to 2 cm wide. These leaves curl up at night (exhibiting nyctinasty), and open in the day to perform photosynthesis.
Cladophora is a genus of reticulated filamentous green algae in the class Ulvophyceae. They may be referred to as reticulated algae , branching algae , [ 1 ] or blanket weed . [ 2 ] The genus has a worldwide distribution and is harvested for use as a food and medicine.
"Weed control is all about competition as a healthy and properly cared for lawn will make it much harder for these pesky weeds to take hold," he says. Mowing The type of turf provides guidance on ...
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Cyanobacteria (blue-green algae) bloom on Lake Erie (United States) in 2009. These kinds of algae can cause harmful algal bloom. A harmful algal bloom (HAB), or excessive algae growth, sometimes called a red tide in marine environments, is an algal bloom that causes negative impacts to other organisms by production of natural algae-produced toxins, water deoxygenation, mechanical damage to ...
Setaria viridis is a species of grass known by many common names, including green foxtail, [1] green bristlegrass, [1] and wild foxtail millet. [1] It is sometimes considered a subspecies of Setaria italica. [1] It is native to Eurasia, but it is known on most continents as an introduced species and is closely related to Setaria faberi, a ...
The flowers are mostly visited by bumblebees; [2] when the flowers drop off and tiny bright green seed pods 10–20 mm long, start to form. [3] Cow vetch is very similar to hairy vetch (Vicia villosa), but is distinguished from the latter by its smooth stem. Legumes and seeds. The seed pods are 2 cm long and contain 6 to 8 seeds. [4]