C. tomentosum

C. tomentosum may refer to:
 * Calophyllum tomentosum, the bintangur, a flowering plant species found only in Sri Lanka
 * Cerastium tomentosum, the snow-in-summer, a flowering plant species
 * Clerodendrum tomentosum, the downy chance, hairy lolly bush or hairy clerodendrum, a shrub or small tree species occurring in eastern and northern Australia

Synonyms

 * Caryocar tomentosum, a synonym for Caryocar nuciferum, the butter-nut of Guiana or Pekea-nut, a fruit tree species native to northern Brazil, Colombia, Guianas, Peru and Venezuela