Visited my garden graveyard today, where all the flats that failed to sprout and wimpy seedlings are banished until I get around to sanitizing pots. To my surprise, I was met with several robust pepper plants, some even with flowers!

Is there any way to ID what variety these are, other than 'wait and see' ? It's so late in the season I might not see mature fruit before frost, especially if I transplant them to a proper bed. I'd hate to give up limited greenhouse space 'just in case' its a variety I don't have. :-/

Only seeded three varieties this year: habanero, hungarian yellow wax, and bell pepper.

Thanks!

...TL;DR: Is fruit the only way to ID pepper plant varieties?