NoDictionaries   Text notes for  
... adparatus, displicent nexae philyra coronae, mitte sectari,...

Abl. is required by both sense and meter, "a crown woven of philyra"; the meter is Sapphic strophe; the last four syllables of the Sapphic line are long, short, long, short, so the final "a" of "philyra" is long.