What is "phyllocladium"

Phyllocladium \Phyl`lo*cla"di*um\, n.; pl. Phyllocladia. [NL., fr. Gr. ? a leaf + ? a sprout.] (Bot.) A flattened stem or branch which more or less resembles a leaf, and performs the function of a leaf as regards respiration and assimilation.

n. (context botany English) A flattened stem or branch that more or less resembles a leaf, and performs the function of a leaf as regards respiration and assimilation.