Just like the common name "cat" refers to many different species (Persian, Siamese, etc.), "bromeliad" refers to many different species and genera within the Bromeliaceae family.
Here are some examples of bromeliad species and their scientific names:
* Pineapple: *Ananas comosus*
* Tillandsia ionantha (Pink Quill): *Tillandsia ionantha*
* Aechmea fasciata (Urn Plant): *Aechmea fasciata*
* Guzmania lingulata (Scarlet Star): *Guzmania lingulata*
* Vriesea splendens (Flaming Sword): *Vriesea splendens*
To be more specific about a particular bromeliad, you need to use the genus and species name (e.g., *Tillandsia ionantha*), which is how scientists refer to them.