Two older gentlemen are sitting in the yard of one of their homes, enjoying some sun.

Two older gentlemen are sitting in the yard of one of their homes, enjoying some sun.
‘Hey,’ said one of them, ‘My doctor gave me these pills for my memory loss. I’m telling you, since I’ve been taking them, I can remember everything I do.’
‘That’s great, Harry,’ said the other. ‘You know, I’ve been having some issues myself. Mind if you tell me the name of these pills so I can buy them..?.
It’s, uh… it’s… what’s the name of the flower, the red one?’ Harry asked.
‘Uhm, a carnation.?.’ his friend asked.
No, no,’ Harry says, ‘it’s the really popular one, you know, the one everybody buys for birthdays.?.
A lily.?’ the friend guesses.
No, no!’ Harry says. ‘The one with the thorns?
‘A rose.’
‘Yes! That’s it,’ Harry says. Then he turns around towards his front door.
‘HEY! ROSE!’ he shouts. ‘What’s the name of those pills I’ve been taking for my memory?