What's in a name?
'A rose by any other name would smell as sweet.'
Absolutely true, but if you are searching for reliable information using the correct name will get you more hits from reputable sources. I'm not referring to common names, but the linguistically interesting back formations and reinterpretations of botanical names which evolve.
A Cosmo (Cosmos is singular & plural)
Rudbeckia 'Goldstrum' (Goldsturm)
A Gladiola ( Gladiolus/Gladioli)
Any more favourites?