Marrs arose as a limb sport of 'Washington' navel in 1927 in Donna, TX. The tree is small by comparison to other oranges. Its fruit are medium large, round to slightly oblate, with a thin, smooth, moderately thick peel that is easily bruised during harvest. It can contain as many as nine seeds. The peel is yellowish, as is the juice, but quality is not particularly good because of low acidity, although the flavor is sweet. It matures in late September.