Sentence:  And so , after a flight southeast to Savannakhet , we found ourselves bouncing along in a Jeep right behind the Land-Rover of Prince Boun Oum of Champassak , a tall man of Churchillian mien in a <WSD>bush</WSD> jacket and a ten-gallon hat from Texas . 
Meaning of the word marked with <WSD> tags:  a loose fitting jacket; resembles a shirt with four patch pockets and a belt