 There are several small yellow discomycetes with which Bisporella citrina might be confused. Lookalikes include the acorn cup (Hymenoscyphus fructigenus) that grows on fallen acorns and hickory nuts. The green stain fungus (Chlorociboria aeruginascens) forms blue-green cups, and stains its wood substrate bluish-green. Lachnellula arida is up to 6 mm (0.24 in) in diameter, and has hairs around the edge of its cup, and its outer surface is covered with short brown hairs. Fruit bodies of Bisporella sulfurina have a coloration similar to B. citrina, but they are smaller and grow in clusters on old, blackened, fungal stroma on wood.
