C. rubra

C. rubra may refer to:

Cephalanthera rubra, the red helleborine, an orchid species found in Europe, north Africa and parts of Asia
Chionochloa rubra, the red tussock, a plant species endemic to New Zealand
Clathrina rubra, a sponge species
Claytonia rubra, the redstem springbeauty, a wildflower species
Crax rubra, the great curassow, a large black pheasant-like bird species

See also