Robert Graves Poem Line, __ Drowsed Again I Lay

This page is the CodyCross answer for the clue below from African grasslands, Group 1547, Puzzle 4 (Ostriches and Flamingos).

Question is: Robert Graves Poem Line, __ Drowsed Again I Lay

and the answer is: MORPHIA

Word Meaning:

MORPHIA — (dated) Synonym of morphine.

Definitions from Wiktionary.