Gobhilagrihyasutra 1.5.18

1.5.18

teṣām alābhe śūkatṛṇa-śara-śīrya-balbaja-mutava-nala-śuṇṭhavarjaṃ sarvatṛṇāni;

If that (i.e. Kusa grass) cannot be obtained, (he may take) any kind of grass, with the exception of Sûka grass, of Saccharum reed, of such grass as is apt to break, of Balbaga grass, of Mutava, of Amphidonax reed, of Suntha.