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Sesleria caerulea, the blue moor-grass, is a species of perennial grass in the family Poaceae, native to Europe.

Sagina apetala is a species of flowering plant in the family Caryophyllaceae known by the common names annual pearlwort and dwarf pearlwort. It is native to Europe and it is known elsewhere as an introduced species, including parts of North America. It grows in many types of disturbed habitat, such as cracks in the sidewalk. It is a petite annual herb producing a threadlike stem just a few centimeters long, spreading or growing erect. The plant is glandular and somewhat hairy. The leaves are linear in shape and not more than about a centimeter long. The inflorescence is a solitary flower

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Melica brasiliana, is a grass species in the family Poaceae that is endemic to Brazil and southern South America.

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Echinochloa oryzoides is a species of grass known by the common name early barnyard grass. Its origin is not certain but it may be Eurasia. The grass is a major weed of rice paddies; it is a serious problem as it is an effective Vavilovian mimic of rice, very difficult to separate from the crop.

Oplismenus undulatifolius, commonly known as wavyleaf basketgrass, is a species of perennial grass from the family Poaceae that is native to Eurasia, specifically Southern Europe through Southern Asia. Due to its invasive nature, it can be found in countries such as Pakistan (Punjab & Kashmir), China, Japan, Korea, India, Australia, South Africa, and has since been introduced to the Mid-Atlantic United States. There are no recognized subspecies in Catalogue of Life.

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Ammannia verticillata is a species in the family Lythraceae. It is found in central and southeast Asia, and is naturalized in southern Europe. It grows in wet places such as marshes, river banks and rice fields.

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Mcneillia graminifolia is a species of flowering plant in the carnation family, Caryophyllaceae. It is a subshrub native to southeastern Europe, including Italy, Sicily, the former Yugoslav countries, Albania, Greece, and Romania.

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