GRC
Bailly
ΐδος (ἡ) [ᾰῐδ] peuplier blanc (Populus alba L.) IL. 13, 389 ; 16, 482.
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LSJ
ΐδος, ἡ, white poplar, Populus alba, elsewh. λευκή, Il. 13.389, A.R. 4.1476. (Expld. with ref. to Ἀχέρων, from the legend that it had been brought from the nether world by Hercules, Paus. 5.14.2.) Ἀχερωΐδες ὄχθαι of the river Acheron in Asia Minor, Nic. Al. 13.
Liddell-Scott-Jones, Greek-English Lexicon (9th ed., 1940)
Pape
ίδος, ἡ, Silberpappel, populus alba, Il. 13.389, 16.482 ; von Ἀχέρων, weil sie Herakles aus der Unterwelt herausgeholt haben soll.
Pape, Griechisch-deutsches Handwörterbuch (3. Aufl., 1914)