Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
† nardostăchyon, ii, n., = ναρδόσταχυς, spikenard, Apic. 7, 6, § 282; 8, 2, § 347; Theod. Prisc. de Diaet. 15.