Heard spelling

inflorescance

Spelled inflorescence. an unstressed vowel

The vowel before the final -nce is an e.

Inflorescence, not inflorescance.

It is unstressed and close to nothing in speech, but the family it belongs to settles it: adolescence, convalescence, effervescence, obsolescence. All take an e, because all of them come through Latin -escentia.

Say

in-flor-ESS-uhnss

Letters

I-N-F-L-O-R-E-S-C-E-N-C-E