Try to make your search as simple as possible:
Lecythis will find all items including that sequence of letters.
Search results for "Lecythis":
"Lecythis elliptica" - Lecythis minor
"Lecythis ovata" - Eschweilera ovata
"Lecythis usitata" - Lecythis pisonis
"Lecythis zabucaya" - Lecythis zabucajo