This plant is from the orchid family. The plant in my photos (along with more of different sizes) were found growing in my front yard daylily border. The leaves blend in with daylily plants, which is not really noticeable until it scapes and produces tiny pink blooms. There is concern that it may become invasive in Florida. It can withstand cooler (not long-term freezing) temps as well therefore it could show up in other southern US states. It is thought to have entered the USA as an import plant. It reproduces via tiny seeds that can be carried by the wind and it is becoming a concern that it has naturalized in Florida.

The area that many of these were found in my yard, is an area that had fill dirt brought in after we had our septic drain field redone. I suspect seeds were in the dirt or perhaps in mulch that was used in that location of my front garden. I had planted a long border of daylilies along the front bed and these orchid bulbs started showing up. Some were as large as 3" and others very small (under an 1"). It must grow quite fast, as I never noticed the bulbs when planting the daylilies, but within 8 months they started becoming apparent. It is probably best to bag and trash any when you find them in your yard to prevent the seeds from dropping or blowing around other areas of your yard. I can certainly see how they could become invasive in a garden bed. Best to dispose of them properly to prevent spread of any seeds.