Same entry in Photius and elsewhere. The headword is a poetic two-termination adjective (Archilochus, Bacchylides, and later poetry: see LSJ s.v.) here, as the glossing shows, in the feminine nominative singular. It must be quoted from somewhere; probably Nicander, Theriaca 145, referring to Mt Othrys in Thessaly.
The headword spelled (as it should be) with alphaiota is out of alphabetical order here. Adler's apparatus claims that ps.-Zonaras has duspe/palos -- which would be at the right place here -- but the online text has -ai-. (Bacchylides 5.26 requires the diphthong to make a long syllable.)