
The aptly-named caterpillar grass of South Africa, this photograph captures the inflorescence with only a few anthers emerged. For contrast, see this image revealing the inflorescence with a full row of pendulous exposed anthers.
For further reading, see Harpochloa falx via the South African National Biodiversity Institute.





What a surprise! And another delightful photo if you follow the first link in the description (click on the thumbnail, too) -- the "full row of pendulous exposed anthers" -- I can imagine this lovely fringe dancing in the breeze.
An image search comes up with quite a few more on this one. Also called "eyelash grass".