Michel Kerguélen

Setaria parviflora is a species of grass known by the common names marsh bristlegrass, knotroot bristle-grass, bristly foxtail and yellow bristlegrass. It is native to North America, including Mexico and the United States from California to the East Coast, Central America and the West Indies, and South America. This grass is a perennial with small, knotty rhizomes. It produces stems 30 centimeters to well over one meter tall. The leaf blades are up to 25 centimeters long and under a centimeter wide. The leaves are whitish-green. The inflorescence is a compact, spikelike panicle up to 8 or 10

Thinopyrum acutum, the sea couch, is a species of perennial grass in the family Poaceae (true grasses). They have a self-supporting growth form and simple, broad leaves. Individuals can grow to 65 cm tall. The species is invasive to the Mont-Saint-Michel Bay and has altered the area's ecology.

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Festuca arvernensis (also known as field fescue) is a species of perennial plant from family Poaceae. It is native to France. It can also be found in such US states as California and New Mexico. It was first described in 1977.

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Festuca durissima is a species of grass.

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Festuca armoricana, the Breton fescue, is a species of grass endemic to Europe. It was first described in 1975 by Kerguélen.

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Agrostis curtisii, the bristle bent, is a species of grass in the family Poaceae native to Eurasia. It is densely tufted, with hair like leaves and stems that grow up to 60 cm. Its spikelets are yellow-green in colour, and its lemmas are awned. The ligule is pointed. It has no rhizomes or stolons. Bristle bent flowers in the UK from June until July and is found typically on dry heaths and moors.

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Gamochaeta coarctata, the gray everlasting (also known as cudweed, like other members of its genus), is a species of flowering plant in the family Asteraceae. It is widespread in South America (from Colombia to Uruguay) and naturalized in parts of Eurasia, Australia, and North America. Gamochaeta coarctata is an annual herb up to 15 cm (5.9 in) tall. Leaves are up to 3 cm (1.2 in) long. The plant forms many small flower heads in elongated arrays. Each head contains 2–4 yellow disc flowers but no ray flowers. Some specimens collected in the United States were formerly misidentified as G.

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