The headword, evidently extracted from the quotation given, is problematic. It is the name of a small (64 km. sq.) island at the southern end of the Dodecanese chain, between Crete and Rhodes; but clearly that is inappropriate here. A personal name would be apt, though Toup's suggestion of Kossos was declared rash by Adler; perhaps Krassos (cf. omicron 354)? Hercher printed kle/os ("renown").
[1] Dog's tooth grass, a)/grwstis (cf. LSJ s.v.), which appears in the genitive singular in the quotation, is Cynodon dactylon or Bermuda grass. This turf and forage grass is native to northern Africa, southern Europe, and Asia (Tutin, p. 259; Polunin, no. 1801), but gets its common modern name from having propagated so invasively on the island of Bermuda.
[2] Aelian fr. 120 Hercher (123d Domingo-Forasté), unplaced; cf. delta 233, pi 2054; and mu 1286.