In Malesia there are two species of grasses here tentatively included in Helictotrichon Besser (Gramineae): H. sumatrense Ohwi and H. virescens (Nees ex Steud.) Henr. [inch H. asperum (Munro ex Thw.) Bor and H. junghuhnii (Buse) Henr.]. The delimitation and nomenclature of Helictotrichon, Avenastrum Opiz and Avenula (Dum.) Dum. are discussed. It is proposed to lectotypify Helictotrichon with Avena sempervirens Vill. In the matter of automatic typification of superfluous names Art. 7. 11 is in conflict with Artt. 7. 10 and 63. 3; a correction is proposed