[1] Comment from the scholia to Aristophanes, Birds 238 (see next note). The gloss explains that the second declension noun κλάδος, κλάδου, ὁ has metaplastic datives in the third declension, as if from the neuter κλάδος, κλάδους, τό , declined like τέκος, τέκους, τό .
[2] Aristophanes, Birds 238-239: "and those of you [birds] in gardens that have their pasture on branches of ivy": a lyric passage, see web address 1.
[3] This dative leads back to a nominative *κλάς, κλαδός , instead; its major attestation is in the song "I shall carry my sword in a branch of myrtle", on which see epsilon 1384, phi 592. The latter also comments on the grammar of the form.