hys·sop 
(hĭsəp)
(hĭsəp)n.
1. A woody Eurasian plant (Hyssopus officinalis) in the mint family, having spikes of small blue or violet flowers and aromatic leaves used in perfumery, as a condiment, and formerly in medicine.
2. Any of several similar or related plants, such as some species in the genus Agastache.
3. An unidentified plant mentioned in the Bible as the source of twigs used for sprinkling in certain Hebraic purification rites.
[Middle English ysope, from Old English ȳsōpe, from Latin hȳsōpum, hyssōpus, from Greek hussōpos, probably of Semitic origin; akin to Aramaic 'ezobā.]
hyssopHyssopus officinalis