Colchiques dans les prés, fleurissent, fleurissent; colchiques dans les prés, c'est la fin de l'été.
From what I can tell, they are some kind of colchique (colchicum), commonly known as autumn crocus (there's a label in the pot that says "yellow colchicum." Most of the examples of this plant I found on the internet are wild and flower before leaves are visible, but this one put its leaves up before the flowers, so I'm a little confused by that. Colchiques are not true crocuses and should not be taken for saffron-producing flowers. These are highly toxic if ingested.