| Within the genus or family of maple trees, for instance, a red maple is Acer rubrum and a sugar maple is Acer saccharum. |
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| Previously, time-resolved fluorescence and transient absorption measurements have been performed using chromatophores from Rhodospirillum rubrum and Blastochloris viridis. |
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| Much of the sampled bark on older trees, especially Acer rubrum, was loosely attached and in various stages of decay, much like the bark on decaying logs on ground sites. |
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| For example, the pink sands of Bermuda get their color from the shells of a foraminiferan called Homotrema rubrum which has pink to red-colored shells. |
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