[HairOfTheDog]

I know this one! - It is in Lothlorien! - from the chapter Lothlorien:

'Behold! You are come to Cerin Amroth,' said Haldir. `For this is the heart of the ancient realm as it was long ago, and here is the mound of Amroth, where in happier days his high house was built. Here ever bloom the winter flowers in the unfading grass: the yellow elanor, and the pale niphredil. Here we will stay awhile, and come to the city of the Galadhrim at dusk.'

[HairOfTheDog]

The quote is Aragorn speaking.