Helictochloa pratensis, known as meadow oat-grass, is a species of perennial flowering plant in the grass family Poaceae, found in temperate parts of Europe 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.
References
Further reading 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.