Try to make your search as simple as possible:
Lunaria will find all items including that sequence of letters.
Search results for "Lunaria":
"Botrychium lunaria var. matric" - Botrychium matricariifolium proteg.
"Lunaria biennis" - Lunaria annua mix
"Lunaria biennis Alba" - Lunaria annua v albiflora
"Lunaria biennis Violet" - Lunaria annua