Helictotrichon pratense, known as meadow oat-grass, is a species of perennial flowering plant in the grass family Poaceae, found in temperate parts of Europe, North Africa, and Asia. Its culms are erect and 30–85 cm long; leaves are mostly basal. It is restricted to shallow, calcareous soils such as those formed on chalk and limestone substrates. Synonyms Arrhenatherum pratense (L.) Samp. Avena pratensis L. Avenochloa pratensis (L.) Holub Avenula pratensis (L.) Dumort. Avenula pratense Helictochloa pratensis Romero Zarco References See also GrassBase entry Rzut. Oka Jeogr. Fiz. Wol. Pod. 10. 1828 Roser, M. 1995. Taxon 44:395. Tutin, T. G. et al., eds. 1964–1980. Flora europaea. [Avenula pratensis (L.) Dumort.]. Tzvelev, N. N. 1976. Zlaki SSSR. pratense Plants described in 1753 Taxa named by Carl Linnaeus