A New Recurring Segment – Mystery Plants

All my neighbors warned me to just let things grow in my front and back yard – the OG MG’s (remember, that means original owners, the Master Gardeners) planted a ton of beautiful flowers, and they just pop up at random. Much of my gardening is playing a game of “is this a weed or a flower?” and it looks a lot like this…

The goal with this segment is to (hopefully) crowdsource information from more knowledgeable gardeners, so I can know what is growing in my yard. And, of course if it’s something I want to grow or yank.

Today’s Mystery Plant

I’ve counted 4 of these seedlings that have popped up in my front yard. They have very thick stems compared to the zinnia I grow nearby, and their cotyledons are shaped like a horizontally-elongated “B”.

cot·y·le·don – an embryonic leaf in seed-bearing plants, one or more of which are the first leaves to appear from a germinating seed.
DEFINITIONS FROM OXFORD LANGUAGES, VIA GOOGLE

Since these funky-shaped leaves are cotyledons, I’m not sure that the true leaves that grow later will be the same shape.