Same entry in Photius, Lexicon kappa996 Theodoridis; similar ones elsewhere (see Th.'s references, and notes below).
[1] Also glossed in Hesychius kappa3736 (s.v. ko/rxoron) as "a wild herb". We know this is the blue pimpernel through Dioscurides Pedanius, De Materia Medica 2.178, where it is used as an alternative name for a)nagalli\s h( kuanh=, Anagallis caerulea.
[2] Zenobius 4.57, Diogenianus 5.36a (repeated in Apostolius 9.100); scholia on Aristophanes, Wasps 239a, 239b (web address 1); scholia on Nicander, Theriaca 626a; often in the variant ko/rkoros. Mangled in kappa 1404 as a reference to galleys (ke/rkouros).
LSJ s.v. ko/rxoros suggests the equivalent "a tailor among kings". Zenobius gives the wording used by the Suda: "the Peloponnesians call 'blue pimpernel' a certain wild herb, of the worthless sort; hence the proverb." Diogenianus actually explains it: "[proverb] concerning those who are worthless, but think of themselves as great. For the blue pimpernel is a kind of worthless plant."
[3] Better known now as mahi-mahi: Coryphaena hippurus. This interpretation of the word comes from the scholia to Aristophanes, Wasps 239a (see above): "against Lycophron, who said the korkoros is a little fish; but he is deceived, as Eratosthenes says, for it a wild and worthless herb". The word is not present in our attested corpus of Lycophron. Hesychius (above) also glosses the word as "fat".