Cymbopogon species- Desert National Park, Rajasthan

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Request for grass species identification : 1 correct image as above.  5 posts by 3 authors.
Please help me to identify the two grass species. I photographed this 2 grass species in the Desert National Park in 2005.

1 image is Aristida species and 2 I think Apluda mutia

the second one is cymbopogon sp

Second one is Cymbopogon sp. may be tharensis