In young cells the chromatophores are small, colorless, highly refractive bodies, principally located around the nucleus.
Those chromatophores which remain colorless, and serve simply as starch-f ormers in parts of the plant not exposed to the light, are called leucoplasts or amyloplasts.
In the Cyanophyceae the contents of the cell are differentiated into a central colorless region, and a peripheral layer containing the chlorophyll and other coloring matters together with granules of a reserve substance called cyanophycin.
An entirely clear colorless glass was made in the XVIIIth Dynasty, but colored glass was mainly used.
Ax., Green axis creeping on the surface of damp soil; rh., colorless rhizoids penetrating the soil; asc. ax., ascending axes of green cells.