Try to make your search as simple as possible:
Hovea will find all items including that sequence of letters.
Search results for "Hovea":
"Hovea celsii" - Hovea elliptica
"Hovea corrickiae" - Hovea longifolia
"Hovea ilicifolia" - Hovea chorizemifolia
"Hovea purpurea v rosmarinifoli" - Hovea rosmarinifolia