Entry lacking, Adler reports, in mss AF.
The headword is a neuter noun in the genitive plural; cf. generally LSJ s.v. sau/nion. It must be quoted from somewhere, and there are suitable instances in (e.g.) Diodorus Siculus and Dionysius of Halicarnassus' Roman Antiquities, but in the 'javelin' sense (#1 in LSJ; #2 is membrum virile, in Cratinus). Later -- see next note --, the connotation seems to change to a banner attached to such a staff, and the Suda's instance must be an unidentifiable one of that kind.
[1] The first gloss gives a feminine noun in the genitive singular; see generally LSJ s.v. shmai/a. The second gloss, an alternative spelling of a later Hellenized form from the Latin flammeolum, flammula (veil, banner, pennant), is a neuter noun in the genitive singular; cf. Sophocles, vol. II, s.v. fla/mmoulon, -ou, to\. [In her critical apparatus Adler reports that ms V omits shmai/as h)\ (leaving a kind of pennant), and that ms M transmits the alternative spelling flamou/llou.]