pellitory
noun
pel·li·to·ry ˈpe-lə-ˌtȯr-ē 
plural pellitories
1
: a southern European composite plant (Anacyclus pyrethrum) resembling yarrow
called also pellitory-of-Spain
2
: any of a genus (Parietaria) of herbs of the nettle family with alternate leaves and inconspicuous flowers
called also pellitory-of-the-wall
Word History
Etymology
Middle English peletre, pelytory, from Anglo-French peletre, peretre, from Medieval Latin peletrum, piretrum, alteration of Latin pyrethrum — more at pyrethrum
First Known Use
15th century, in the meaning defined at sense 1