Anyone else seize weed within St. Augustine grass that look approaching grass, but taller &thicker w/ little black seed? I live in N.E. Florida and I own St. Augustine grass....

I live in N.E. Florida and I own St. Augustine grass. All of a sudden in yesteryear 2 weeks I've seen this "weed like" grass growing adjectives over the place in my courtyard. Mostly in shady areas, but it's growing superior than my normal grass and it looks close to grass, but it's thicker and has little tiny black seed-looking things growing on them.
I notice a couple of them 2 weeks ago and now they hold spread like crazy. I don't know if it's a weed or if it's of late some sort of disease in my grass. Does anyone know what I'm chitchat about? It's not Y-shaped weed. It just looks similar to a bigger blade of grass, not too thin.

I've search a ton of websites for pictures and nothing is coming up. I've looked at over 100 weed and nothing is coming close. Thanks!

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Answers:    If you could use a camera to pilfer a picture that would help ;)

Edit:

It looks similar to it might be Dallisgrass but i cant be 100% positive.
The best way to acquire rid of it may just be to verbs it out, I'd also try to get this done honestly quickly as apparently evolve plants can reach a few foot in increase.
(obviously try your best not to ruin your lawn :P)
Good luck

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