Apera is a small genus of annual grasses, known commonly as silkybent grass or windgrass. They are native to Europe, North Africa and parts of Asia but have been introduced and naturalized in much of North and South America. see Agrostis Anemanthele Dichelachne Muhlenbergia Sporobolus • Apera arundinacea - Anemanthele lessoniana • Apera aspera - Sporobolus compositus • Apera crinita - Dichelachne crinita • Apera liebmannii - Agrostis liebmannii • Apera palustris - Agrostis stolonifera • Apera procumbens - Agrostis stolonifera • Apera purpurascens - Anemanthele lessoniana • Apera tenuiflora - Muhlenbergia tenuiflora