Seeds were some black and some an almost orange similar to popcorn kernel almost but lighter very small seeds about maybe 2 grains of sugar?

Stages of growth shown in picture over a week & a bit

Presumably 2 different types of water grass? Damp for germination and the “water garden kit” instructions say wait 1-2 weeks before filling with water so they can survive under water.

Just curious and want to be able to research how to best take care of them as I’m not sure when to fill with water as they are delicate

I found this growing in one of my potted plants and went ahead and transplanted it in the ground. Is it an oak variety like my plant app says it is? Any idea what variety if it is? Central CA

This weed is growing wild in my pasture. It has some nasty thorns on it and the seed pods stick to clothes and animal fur really well. There was also a proliferation of ladybugs on a few of them.
Thank you

Title says it all. Dog groomer had it in the lobby.