C. tumescens

C. tumescens may refer to:


 * Chonetes tumescens, an extinct species of brachiopod.
 * Chorigyne tumescens, a species of plant.
 * Chrysogaster tumescens, a species of hoverflies.
 * Clypeaster humilis (synonym Clypeaster tumescens), a species of sea urchin.
 * Corymbia tumescens, a species of tree.
 * Cymbella tumescens, a species of diatom.
 * Cymus tumescens, a species of true bug.
 * Terrabacter tumescens (formerly Corynebacterium tumescens), a Gram-positive bacterium.