Please help identify these 3 weeds
Hi, I recently moved to Hawaii and new to this forum. Could anyone help me identifying these weeds in the pictures, please? 2 weeds in the 1st pic are very thorny and I want to eliminate them for my 2 yo. The weed in the 2nd pic is very invasive and would take over my whole Bermuda if no action are taken soon.
The one with red/pinkish stem with long roots (left in pic) is spreading in my lawn, I use Weed Hound for pulling them as it's very thorny.
The one looks purplish has thorns and very rough to touch. It closes its leaves when touched as sensitive plants.
Here's the crawler that I'm having most problem with:
I was browsing online and it looks like Beach Wire Grass or Crow Foot Grass?!? What's the best way to deal with this? They crawl low on the ground and won't get cut by mower and spread all directions very fast. Grass underneath is dead and often other weeds are hiding instead! Right now I'm hand-pulling but I can not keep up with the growth of this weed. Any advice would be greatly appreciated.
Thank you for your time!