Garudapurana 2.45.7

2.45.7

ekoddiṣṭamaputrāṇāṃ puṃsāṃ syādyopitāmapi /
ekoddiṣṭe kuśā grāhyāḥ samūlā yajñakarmaṇi /
bahirlūnāḥ sakṛllanāḥ śrāddhaṃ vṛddhimṛte sadā //

An ekoddiṣṭa śrāddha is for childless men and also for women.
In an ekoddiṣṭa, the kuśa grass taken should be rooted, for a sacrificial act;
cut at the ends and plucked once, always in a śrāddha, except in an auspicious śrāddha.