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Festuca: A plant genus of the family POACEAE. The common name of fescue is also used with some other grasses.Lolium: Common member of the Gramineae family used as cattle FODDER. It harbors several fungi and other parasites toxic to livestock and people and produces allergenic compounds, especially in its pollen. The most commonly seen varieties are L. perenne, L. multiflorum, and L. rigidum.Poaceae: A large family of narrow-leaved herbaceous grasses of the order Cyperales, subclass Commelinidae, class Liliopsida (monocotyledons). Food grains (EDIBLE GRAIN) come from members of this family. RHINITIS, ALLERGIC, SEASONAL can be induced by POLLEN of many of the grasses.Acremonium: A mitosporic fungal genus with many reported ascomycetous teleomorphs. Cephalosporin antibiotics are derived from this genus.Epichloe: A genus of ascomycetous fungi in the family Clavicipitaceae, order HYPOCREALES, which are fungal symbionts of grasses. Anamorphic forms are in the genus NEOTYPHODIUM.Ergotism: Poisoning caused by ingesting ergotized grain or by the misdirected or excessive use of ergot as a medicine.Poa: A plant genus of the family POACEAE that contains the Poa p Ia allergen and allergen C KBGP.Plant Poisoning: Poisoning by the ingestion of plants or its leaves, berries, roots or stalks. The manifestations in both humans and animals vary in severity from mild to life threatening. In animals, especially domestic animals, it is usually the result of ingesting moldy or fermented forage.Neotyphodium: The anamorphic form of the fungus EPICHLOE. Many Neotyphodium species produce ERGOT ALKALOIDS.Hypocreales: An order of fungi in the phylum ASCOMYCOTA that includes a number of species which are parasitic on higher plants, insects, or fungi. Other species are saprotrophic.Ergotamines: A series of structurally-related alkaloids containing the ergotaman backbone structure.Ergot Alkaloids: Alkaloids originally isolated from the ergot fungus Claviceps purpurea (Hypocreaceae). They include compounds that are structurally related to ergoline (ERGOLINES) and ergotamine (ERGOTAMINES). Many of the ergot alkaloids act as alpha-adrenergic antagonists.Carex Plant: A plant genus of the family CYPERACEAE. The seed contains oligostilbenes (STILBENES).Animal Feed: Foodstuff used especially for domestic and laboratory animals, or livestock.