Dracula's Ranunculus

Dracula's affinity for ranunculus bordered ridiculous
To the point of using calculus and parabolas to predict the bloom of the flower fabulous

Then Dracula's time came to give the ranunculus
To the lovely Ursulas who had his heart rapturous

But alas! The ranunculus were not in season crushing Dracula's reason

"So sorry. Indeed I am." were the words of Dracula as was his weird vernacular
Nonetheless Ursulas says, "Don't be ridiculous!"

And her smile was enough for Dracula to reason
That it needn't matter the season
Nor what the calculus and parabolas said when the flower fabulous would bloom

For Ursulas herself was the flower fabulous, the rapturous ranunculus that's forever in bloom.