[1] Similarly in Hesychius (rho500) and, post-Suda, the Etymologicum Magnum (706.35-36); generated by the appearance of the noun r(umo/s in Homer, Iliad 5.729. In the Hesychius entry (as printed in Latte's edition) the single word 'pole' is the headword, and 'of the chariot' begins the gloss: 'the extended timber of the pole etc.'. The same might be true here. See further, next note.
[2] Such a thing is otherwise unattested -- but NB: in Hesychius rho500 the reading is '(timber), which some call a stemon and stathmion'. Perhaps this Suda contributor knew that 'some' included the Rhodians; or else the clause is corrupt.
[3] On Heraclitus see generally eta 472; on the Bear, alpha 3961.