Grass, plain grass. You can see some large foliage there where the mist's thinned down.
7 seconds sound clip from the X Minus 1 - Mars is Heaven by Ray Bradbury classic radio dramaseries.
You can hear this line at 00:10:06 in the radio play.
Quote context
[...]
- Very homley but unlikely sound. A rooster crowing on Mars.
- Kingston. Set that machine gun twenty-five yards to the flank.
- We'll stay here till the ground mist lifts.
- What do you make of the ground, Horst?
- Grass, plain grass. You can see some large foliage there where the mist's thinned down.
- Kingston, hold your fire you fool!
- I hit it Captain! Some kind of wild animal, I hit it. I can see the traces, but it's still standing.
- Come on, Horst. Doctor where are you?
- Up ahead, admiring the wild animal.
[...]